Now VoIP is Spelled C-L-O-U-D

By: John Shepler

When VoIP telephony first appeared on the scene, it looked distinctly like a different way to make a phone line. In fact, a lot of the motivation in switching technologies was based on trying to avoid long distance toll charges on the PSTN. We’ve come a long way from Analog Telephone Adaptors (ATA) to IP PBX. The next big migration is away from in-house VoIP systems and out to the cloud. It’s a migration that could easily turn into a stampede.

The Need For Speed
What’s driving the continuing innovation in VoIP technology? It’s all part of the business reorientation away from ownership. The “great recession” exacerbated a trend that was already underway. Business wants and needs to be nimble. Timelines that used to be measured in years are now months. This is especially true for seasonal businesses, but can affect everybody. Why do you want to be stuck with assets that are too much or too little for what you need right now? Why, indeed, when you have to option to match resources to needs on the fly?

Nimble is the Cloud
That’s the promise of the cloud. As one tenant among many at a datacenter with seemingly unlimited resources, you can quickly scale up and down as needed. It’s unlikely that your needs will tax the system or leave it sitting idle. If the providers are doing their jobs, there will be plenty of capacity for everyone and enough in reserve to handle unexpected requirements.

Contrast that with running your own data center in-house. Running out of capacity? You better get to work preparing the justification and requests for more capital. Then get the equipment and software ordered, installed and on-line… before external events bring your business to its knees. That’s weeks, months and sometimes years.

Much easier just to make a phone call or, better yet, log-in to your online control panel and activate or deactivate resources. An unexpected flood of orders is cause for celebration instead of panic when you can respond instantly. Business fall off a cliff? No need to be stuck paying for idle capital when you can be rid of it and its unjustified expense in a moment.

Why Do You Really Need a Phone System?
The obvious reason to have a business phone system is for critical communications among employees, customers and vendors. Actually, that’s the reason to have the phone function. You don’t really need to have the system yourself.

The telephony cloud solution is called Hosted VoIP or Hosted PBX. All that “big iron”, as these systems are lovingly referred to, go out the door. They are replaced by cloud services that take care of call switching and connections to the public telephone system. How that’s done is invisible to you. Your phones work the way they should and you don’t have to deal with having to maintain a morass of wiring and rack equipment.

You also don’t have to cough up the capital needed to purchase a premises telephone switching system or replace one that has reached its capacity limit or useful life. Adding or removing phone from a hosted system is almost trivial. You’ll always have exactly the right level of resources to meet today’s needs. You also have the peace of mind that comes from knowing if things change tomorrow, you can easily accommodate the new situation.

The Technology Advantage
Another promise of VoIP technology is that phone networks become more like computer networks. In fact, there is generally one network that serves both phones and computing equipment. Building phones with little computers inside expands the possible functions they can do and make it easy to integrate them with desktop computers for combined operations. That’s especially valuable for call center operations.

The cloud hosted phone system also may have the capability to integrate mobile phones as well as the hardwired variety. Few in-house PBX systems can do that. In the end, you want employees to be able to do their jobs whether they are at their desks, out in the field, in a hotel room or anywhere else. That’s something technology can accomplish today… but you can’t do it with yesterday’s gear.

Are You Missing Out?
The telephone cloud has developed so rapidly that many companies aren’t even aware of the capability that’s out there and how cost effective it can be. Could you benefit from a hosted VoIP phone solution ? You might be able to sooner than you think.

Circuit Switched vs Packet Switched Networks

By: John Shepler

There have been two major network technologies slugging it out for supremacy over the last few decades. The first is the original telephone architecture that has served us well over the last century of the industrial age. The newcomer is the computer-centric architecture that has been the driver of the information age. You may also know them as circuit switching and packet switching.

While it’s likely that both technologies will continue to coexist for some time to come, we’re clearly at an inflection point. From here on out, packet switching will dominate on every network from copper to fiber to wireless. Let’s see why that is.

What is Circuit Switching?
Circuit switching is a telephone technology. It’s a logical system for that application. Telephone calls require a connection between two devices for a given amount of time. Specialize phones like intercoms can be connected permanently or “nailed up.” For general use it is desirable that any phone can be connected to any other, but needs that connection only for the duration of the call.

That’s the function of the central office switch. It physically ties together the lines running to any two phone sets using electrical switches. At one time multiple phones in a neighborhood would share a line to the central office. This was called a “party line” and allowed anyone to eavesdrop on their neighbor’s calls. As automatic dialing was introduced, the party line fell out of favor and each location had its own phone line with its own phone number. When phones where connected, they had their own unique electrical circuit. This is where the term circuit switching comes from.

Circuit Switching For Digital Lines
When long distance telephone transmission migrated from analog to digital, the concept of circuit switching was kept. Take the T1 telephone trunk, for instance. Each T1 line is segmented into 24 separate channels. Each of those channels carries one phone conversation exactly as if they were on separate wires.

T1 lines found a new application to interconnect computers to let them “talk.” Each telephone channel only supports 64 Kbps of data… dial up speed. A broadband circuit can be created by combining all the channels to make a single 1.5 Mbps transmission line. Like the original analog telephone lines, the circuit from computer to computer needs to be connected or “nailed up” as long as the machines want to talk. Circuit switching connects point to point, but what if you want many machines to be able to communicate at the same, or nearly the same time?

What is Packet Switching?
Packet switching was developed to allow information to be sent among many machines. In a way, it’s the party line re-imagined. Unlike the old analog party line, multiple “conversations” need to occur simultaneously without interference. You can’t do that if all devices simply spew bits onto the line indiscriminately, but you can if each if the bits for each network node are packaged into self-contained units… packets.

Packets contain chunks of data. They also contain address bits that tell where they are coming from and where they should go. This is what makes packet switching possible. Instead of dialing a phone number to determine what circuits should be tied together, network switches and routers direct the packets on their journey according to the addressing contained in the packets. You can have packets from many different devices on the network line at the same time as long as the traffic is well controlled and each packet tells where it needs to go.

Circuit vs Packet
For a long time now, computer based packet networks and telephone based switched circuit networks have coexisted. The largest circuit switched network is the PSTN or Public Switched Telephone Network. The largest packet switched network is the Internet. What’s happening now is that these networks are being combined.

It is more efficient to have one network instead of two to maintain and there are additional services you can have when voice and data share the same network. But, which technology is best, circuit or packet switching?

And the Winner Is….
Packet switching is clearly winning out and has been since computer traffic has exceeded voice traffic worldwide. Computer traffic now includes digitized video which is more dominant and voice and data combined. All of these share the Internet and private networks using packet switched technology. As wireless voice moves from dedicated cellular to packet transmission over 4G networks, the transition from circuit switched networks to packet switched networks will be complete.

What network connections do you need to support your business or organization? There are many options from analog POTS to T1 digital trunks, to dedicated copper and fiber optic Internet access and multi-location Ethernet and MPLS networks. Get pricing and availability now.

VoIP Compatible High Speed Internet

Voice over IP (VoIP) technology is attracting more and more business users all the time. There are big advantages over traditional Plain Old Telephone Service (POTS) in features and cost savings. The big issue is what to do with the outside phone lines.

Why is this even a question? It’s because the century old public telephone system has been based on analog transmissions over twisted pair copper wiring. Many smaller companies still have multiple analog business lines connected directly to their phones or to Key Telephone systems or in-house PBX systems. Others who are big enough to need at least a half-dozen outside lines have moved to digital transmission via ISDN PRI, also called T1 PRI.

So, if PRI is digital then what’s the issue with VoIP?

Well, there’s digital and there’s digital. PRI telephone trunks are actually digital replications of the old analog lines. Each PRI consists of 23 channels that each carry one digitized phone conversation. One other channel is used for switching and data, like Caller ID. Those 23 PRI “B” channels are strung together end to end for transmission. Each channel is 8 bits wide and sampled 8,000 times a second. At the far end, the channels are separated and converted back to analog phone signals.

Note that nowhere here is any mention of packets. You know that computer networks all communicate using standardized packets of information. Each packet has both address and data bits. This allows switches and routers to get them from wherever they originate to wherever they are intended.

TDM (Time Division Multiplexed) lines, such as PRI, use channels instead of packets. The switching function is provided by the central office switch. When a phone call is in process, there is a direct electrical connection between the two callers. That connection is set up at the beginning of the call and torn down when the call is over.

If you are thinking that PRI service isn’t really compatible with VoIP, you’d be partially right. It’s really a conversion process between your office phone system that might be VoIP and the Public Switched Telephone Network (PSTN) that is still analog and TDM based. What VoIP really needs is a telephone line that is compatible with packet switched technology.

The first obvious option is to use the Internet to connect you with your VoIP phone service provider. After all, the Internet is readily available, relatively inexpensive to access, and packet based. Remember that Internet Protocol (IP) is the basis of VoIP.

What gets missed is that there is a big difference in the technology that includes Internet Protocol and the actual performance of the public Internet itself. One issue is that the Internet is open to anyone to do pretty much anything they want on it. There is no traffic manager ensuring that each user gets adequate resources for their particular application. There is a pool of resources and it’s first packet come, first served. Your voice packets may be competing with users backing up their files to the cloud, accessing ecommerce websites or downloading HD videos. If there is enough low latency bandwidth for everyone, then no problem. If the pipes get clogged up like rush hour on the Interstate, then you get what you get.

That can be a big problem for sensitive packet streams such as VoIP calls. Network congestion can cause dropped packets that distort the voice, delay some packets so they arrive out of sequence and are discarded, or impose a noticeable delay that makes two-way conversations difficult.

You can improve your chances of getting decent VoIP voice quality by using dedicated instead of shared bandwidth for your connection. That means Ethernet over Copper or T1 lines instead of cable broadband or DSL. You can also impose QoS (Quality of Service) through your own router so that at least your VoIP conversations aren’t competing with computer file transfers in your own office.

A better idea, although a bit pricier, is to use a dedicated private line called a SIP trunk between your network and your service provider. QoS is maintained by the service provider from end to end. As long as you have enough bandwidth to support all the calls you want to make, everything should work beautifully all the time. SIP trunks can be set up to provide you with both telephone service and broadband Internet access. This is done by dividing up the trunk so that phone calls and Internet are kept completely separate.

Are you considering a change to your business phone system because you are dissatisfied with how it works or are looking to add features or reduce costs? Investigate enterprise VoIP and hosted PBX solutions with SIP Trunks as a better approach for your company.

Is MPLS The New Telephone Network?

The telephone network, as we’ve come to know and love it, is based on incremental improvements to the PSTN or Public Switched Telephone Network. This is a copper and fiber infrastructure that switches circuits to connect analog, cellular and digital phone calls from any party to any other party. Most business phone systems have depended on or mirrored the architecture of the PSTN to connect even their in-house calls. That’s all changing, with various technologies vying to become the next solution for connecting telephone calls.

What’s prompting the change? It’s not wireless. The cellular phone system was designed to be tightly integrated with the PSTN. The earliest cell phones were analog, with TDM and other digital multiplexed protocols following. What hasn’t happened yet is the wholesale transition to packet switched voice on the wireline or wireless phone networks.

Where packet switching, notably VoIP, has flourished is on private telephone networks set up by enterprises for their own use and on connections to the PSTN through the Internet to avoid the phone company local loops.

Why is VoIP such a big deal? More and more businesses are migrating their in-house phone systems to VoIP solutions. Part of the reason is the cost advantage of eliminating the separate phone wiring network in favor of using the corporate LAN to connect computers and telephones. Another reason is to avoid long distance toll charges by interconnecting business locations on a converged voice and data network. A third reason is features. IP telephones are really more like computers than the old desk sets. They can be integrated with business applications to provide things like “screen pops” of customer information based on who is calling.

The migration from circuit switching to packet switching was originally accomplished by replacing the traditional PBX (Private Branch Exchange) with an IP PBX. Think of the PBX as a small version of the PSTN switches that handle massive amounts of public traffic. The PBX resides on your premises and does all your in-house call connections so you don’t have to pay the phone company to make a call from one desk to another. You also need the capacity to make and receive calls with the outside world, so your PBX has to connect to the PSTN through one or more outside lines called trunks.

Trunk lines are bundles of telephone lines. Most businesses need more than one outside line. They may start off with a single analog business line and add more over the years. At some point it makes sense to consolidate all those separate lines into a single digital trunk that can carry up to 24 separate phone conversations.

Just because the trunk lines have been switched from analog to digital, doesn’t mean you are using VoIP. Yes, VoIP telephony is digital, not analog. But the digital protocol used by T1 and PRI digital trunks is time division multiplexed switched circuit, not packet switched IP. With an IP PBX, you can switch to IP telephones in-house and connect your IP PBX to the company LAN so that you don’t have to maintain the separate telephone wiring. Your connections to the outside world will still by the same analog or digital trunk lines to the PSTN.

Where you really cut the cord, so to speak, is when you replace those PSTN trunk lines with something called a SIP Trunk. This is a private line connection between your IP PBX and your telephone service provider. That service provider takes the place of the local telephone company and connects to the PSTN at their end. You can still make all the local and long distance calls you want, but perhaps at a considerable cost savings.

The alternative to the SIP Trunk is the Internet. The Internet connects literally from everywhere to everywhere. It is a massive public infrastructure that economy of scale makes very inexpensive. Connecting from telephone to service provider for residential users is done using the Internet. Many small businesses have also taken this approach to minimize costs.

The tradeoff is that voice quality over the Internet varies quite a bit. It depends on the capacity of your connection plus whatever else is happening on the Internet. Traffic jams called “congestion” can degrade voice quality with distortion and delay. One minute everything sounds great, the next minute the caller sounds garbled. If it gets really bad, the call may be dropped.

Many businesses can’t stand this variability of performance. They want the same quality of phone conversations they had with the PSTN, but with the advanced features and cost savings offered by VoIP. The technical answer has been to use a private line connection between your company and the service provider. These SIP trunks can support multiple conversations, even scaled for hundreds or thousands of simultaneous calls.

The latest development is cloud hosted PBX systems. Cloud computing offers businesses the opportunity to avoid capital investments and maintenance costs in favor of paying by the user by the month to use a cloud based infrastructure. Cloud computing has been extended to include telephone service through a cloud hosted VoIP or cloud hosted PBX system. All of your in-house switching and outside calls are handled through the cloud. You have IP telephones on your premises plus a gateway device that connects through a private line to your cloud service provider.

This is great for single business sites, but does the entire setup have to be replicated at multiple locations?

Yes and no. Yes, you still need your IP phones and gateway at each branch office or other location. However, you can route your calls through the same cloud hosted PBX. Now it becomes more sensible to connect all of your locations to your cloud service provider through a MPLS (Multi-Protocol Label Switching) network rather than pay the cost of a private line for each location.

MPLS networks are privately operated, as opposed to the public Internet, and maintain enough resources to simultaneous support the needs of all of their customers. This includes class of service tagging so that voice calls get the priority they need to maintain call quality. Each location simply needs a last mile connection, such as T1 or Ethernet over Copper, to the very large MPLS network. The network takes care of traffic routing between your locations and your cloud service provider where all the switching takes place.

One excellent example of where this approach is optimized is the XO Hosted PBX service offered by XO Communications. XO is also a network operator, so they can provide both the cloud PBX and the MPLS network to connect your business locations in one optimized system. This gives you one vendor to deal with if problems ever arise.

Sounds a little like the old Bell System, doesn’t it? You deal with a single provider who makes the connections to your phones and does the switching. In this case, you have a choice of vendors and a far richer feature set than offered in the old days of phone monopoly. Today’s cloud hosted PBX systems can include your wireless phones as well as your desk phones so that you only need one telephone number no matter where you are.

MPLS is a likely candidate to become the new telephone network. It supports hundreds or thousands of customers without interference or service degradations. Of course, there needs to be a way to interconnect customers on different networks. This is currently done by routing outside calls through the PSTN. Eventually, Network to Network Interfaces (NNI) may allow larger cloud PBX providers to peer traffic so that most of your calls will be on-net and not subject to toll charges. Even the PSTN may evolve to a very large MPLS network based on VoIP technology, abandoning the analog and TDM legacy technologies that have been the standard for the last century.

Is your company interested in more advanced phone services with potentially large cost savings? If so, get prices and features for enterprise grade VoIP and cloud services now.

Packet Voice Moves to the Cloud

Many businesses and individuals have already switched to VoIP for their telephone service. The original impetus is a cost savings over legacy phone service. Beyond that, enterprise VoIP services offer the opportunity for reduced staff and maintenance coupled with a richer feature set. Just when you thought that VoIP was a settled technology, a new wrinkle comes along. That’s VoIP up in the cloud.

Why move your phone service to a cloud? Let’s take a look at why this might be advantageous to your company and how we got from the old-timey candlestick and desk sets to something as amorphous as a cloud.

A generic technical term for VoIP technology is packet voice. Packets are a computer network protocol most often associated with Ethernet. A packet is a self-contained piece of data that has all the information needed to get it from source to destination. Packets are packets. It doesn’t matter what’s inside. Packets can carry voice, images, video, data and whatever else you can reduce to binary digits.

The major technical leap in packet voice is changing from a switched circuit telephone network to a packet switched network. Switched circuit means that every telephone call has an electrical circuit set up to connect the two (or more) phone sets involved in the conversation. This is unique to the public telephone system and has been that way since its inception. All telephone activity was originally voice calls made between electrically passive telephone sets. Look at one of those old phones. Do you see an AC cord? No way. The electrical power for the call was supplied by batteries at the telephone switching center.

When computer networks became more prevalent than telephone networks, the idea of what a network is changed dramatically. Both telephone and computer networks can run over twisted pair copper wire equally well. What’s different is that computer networks don’t set up and tear down electrical circuits every time that one piece of equipment wants to exchange data with another. The circuits that connect each computer device are continuous. What is switched is the data packets themselves. Ethernet switches or routers ensure that packets get to their intended destinations without having to create new circuit connections on the fly just for a single or group of packets.

Here’s why that’s important. VoIP or packet voice is transported over computer networks rather than switched circuit telephone networks that are only used for telephones. By connecting the phone to the LAN, you can eliminate the separate telephone network. All that wiring and the personnel needed to maintain it and change connections as phones are moved, added or deleted goes away. The cost of running the telephone network also goes away.

Something much larger doesn’t go away. That’s the switching system needed to interconnect telephones, even those using packets, and connect to the Public Switched Telephone Network (PSTN) for outside lines. That specialized switching system is most often called a Public Branch Exchange or PBX. Small businesses with few phones and outside lines may use a simpler system called KTS or Key Telephone System. Those are the phones with individual line lights that tell you if a particular phone line is being used or available for your call. Medium and larger companies have the more automated PBX equipment that manages both internal calls and multiple outside lines.

This is where the cloud comes in. An in-house PBX system can be set up to work with legacy analog phones (switched circuit) or the newer IP telephones used for VoIP. You can connect the phones and PBX to your computer network to eliminate the separate telephone wiring, but you still have to make connections to the public phone network if you want to take or make outside calls. PBX systems aren’t cheap, either. They require a major investment, ongoing maintenance efforts and the likelihood that you’ll have to replace the one you have when it goes obsolete or runs out of capacity.

Why not move that PBX to the cloud the same way that you move servers from in-house to the cloud? That’s the idea behind Hosted PBX, also called Hosted VoIP. The hosting is done by a very large packet voice switching system located at a cloud service provider. You don’t have to buy this system, maintain it or worry about upgrades and obsolescence. That’s the job of the cloud service provider. You simply pay a monthly fee for each phone or “seat” that you need.

Ironically, this concept takes us back to the early days of telephony when there was a large central switching system that connected to each telephone. The difference between the old “Ma Bell” approach and Hosted VoIP is that you are no longer tied to the single phone company that owns the phone wires. You can order network connections called SIP trunks to connect to any cloud provider you want. VoIP technology also allows new applications that integrate telephones and computers, important for call centers and contact centers.

Packet network technology has enabled computers to network within companies and all over the world. This technology is now being used to transmit video conferences and telephone calls on the Internet and private network connections. The rise of cloud computing companies takes packet switching equipment to the next level by moving the central hardware to the cloud, where it can be managed by specialized service providers. The advantage to you is lower costs and more features.

Are you wondering whether your business telephone system is optimum for your current requirements? Why not explore other options that include VoIP, SIP Trunking and Hosted PBX services? Get pricing and features for competing enterprise grade VoIP services to compare with your current setup.

Cloud Hosted IP PBX For Features and Cost Savings

Is this the right time to move your business telephone services to the cloud? You are clearly at a decision point if your current system has run out of capacity, frequently needs repair or is no longer supported. But even if what you have in-house is working fine, you could be missing the opportunity to add productivity features or reduce your communications costs that the latest generation of hosted PBX solutions offer.

A good example is the new version 2.0 Cloud Hosted IP PBX from Airespring called AirePBX. This system completely integrates your fixed and mobile voice communications across all devices and all business locations. That’s important because smartphones are often left out of the loop with traditional PBX systems. If you have branch offices or have grown your business through acquisition, chances are that you have a hodgepodge of telephone equipment unique to each location.

It’s not hard to see how telecom managers can become frustrated when asked to do anything but make voice calls over the PSTN (Public Switched Telephone Network). With most telephony solutions, the PSTN is the only common denominator. That can leave you wanting for some of the newest and most popular calling features. It can also be a source of unnecessary costs if you must use the public telephone network when you could be using your own data network.

AirePBX, like other hosted VoIP solutions, takes the job of managing a telephone network out of your hands and into a service cloud managed by specialists. With hosted PBX, there is very little in the way of telephone equipment onsite. The PBX goes away. So does all that telephone wiring. You no longer need telephone lines or trunks for outside calls, because that is all handled in the cloud. What you have is telephones that plug right into your LAN and an on-premise enterprise grade session border controller to manage VoIP and data traffic.

What kind of features can you expect with a hosted solution? AirePBX offers HD voice for sound clarity beyond what you think a telephone is capable of. It has a full featured auto attendant, or automated receptionist. With this, even the smallest companies can make a big impression on their customers without having to hire a dedicated operator. You can swap devices mid-call. If someone calls your office phone as you are about to leave your desk, quickly switch the call to your smartphone and continue the conversation on the go. Of course, you also get advanced call routing, find me/follow me, simultaneous ring, caller ID, call forwarding, call park, call transfer, conferencing, fax to email, unified visual voice mail, three-way calling, toll-free numbers, virtual extensions and the ability to manage it all using an online management portal.

Sounds good, but don’t you have to spend a lot of money upgrading your phones? Not at all. AirePBX provides advanced IP desk phones as part of your service at no extra charge. You also get the session border controller at no charge and free professional on-site install. You simply pay per seat per month for the number of phones, “seats”, that you are using. When you need more, you can easily add them. You never pay for capacity that you aren’t using. That alone gives you a business flexibility that you probably don’t have now.

What are the cost savings? AireSpring estimates that you can save up to 50% over the cost of traditional telephone service by moving your PBX or Key System to the cloud. How much can you save? Why not get a quote for cloud hosted IP PBX service from AireSpring and other competitive providers and find out. You could be looking at a major reduction in your communications expenses with better performance as well.

Business Telephone Systems Hosted VoIP Advantages

Companies looking to replace or install new business telephone systems have more options today than in recent years. Small companies can pick up a system that supports only a few outside lines from their local office supply store. Medium size companies typically bring in a contractor or VAR (Value Added Reseller) to install a key telephone system or small PBX. Large companies needing hundreds or thousands of handsets often have their own telecom organizations that build sophisticated in-house telephone companies. All of these companies, from small to large, should now be looking at hosted VoIP as a cost savings alternative.

How is it possible that one solution can handle the needs of the smallest to the largest operations and still be cost effective? It’s not a single one-size-fits-all solution. It’s a technology that readily scales to handle whatever demand is thrown at it. That’s hosted VoIP, also called hosted PBX or telephone in the cloud.

The cloud metaphor gives it away. What you are really dealing with is large data center set up to specifically handle business telephony for many clients. The characteristics that make this a cloud service are enormous scalable capacity and virtualization that keeps various clients isolated from each other. Billing follows the cloud model of pay-as-you-go. The service provider makes all capital investments in infrastructure plus the operational expenses in operating and maintaining the service. Clients pay by the seat by the month for the service they use.

Typically what you get with hosted VoIP is a suite of telephone services very similar to the most advanced PBX systems you could buy and install yourself. You pay a single price for your call switching. That includes in-house, local outside calls and domestic long distance. Overseas calling is extra, like it is with any calling plan.

One thing you get easily with a hosted solution is the ability to tie together multiple business locations. You can do this in-house to avoid paying toll charges to the phone companies for calls that go between your branch offices or back to headquarters. However, the solution involves you converging your network and running your own SIP trunks between PBX systems. If you want to avoid the telephone companies, you have to become the telephone company. Your service area is the various locations owned by your company.

Hosted VoIP providers maintain a cloud that contains the virtual PBX. You connect to that cloud from each of your locations, or back to HQ on your own network and then off to the cloud for call switching. Either way, the cloud doesn’t care where the handsets are located. They are simply network devices that can be connected at will. Connect a bunch of them together and you have a conference call.

What hosted VoIP providers are offering now is a way to share outside lines among all your remote locations. Remember that in-house calls don’t touch the public phone system. They are all “on-net,” so to speak. It’s only when you have to call outside the company that you need the PSTN (Public Switched Telephone Network). In the past, each of your locations would have its own PBX with its own outside lines. Some locations could have people waiting to use a line. Others could have a dozen lines vacant. With a hosted solution, all PSTN trunks come into the cloud and can be used by whoever needs them. It doesn’t matter which “branch” you happen to be at. Not all providers do this, so if it is an important feature for you then be sure to specify that you need this as a cost saver.

So far we’ve seen that hosted VoIP has the advantages of offering nearly limitless capacity on a pay as you go basis, with no capital investment and no need to maintain equipment yourself. It also easily connects multiple business locations with a complete set of the latest PBX features. Many providers can now integrate mobile phones so that your smartphone has access to the system as easily as your desk phone. Some providers even go so far as to provide you with new desk phones with the cost rolled into your service plan.

Can hosted VoIP make sense as your next phone system. Get prices and features for competing business telephone systems with hosted VoIP and see what makes the most sense for the size of your company.

Can You Save 50% With Unified Communications?

Have you noticed that your telephone expenses have grown right along with the expansion of your organization? Of course. In fact, they’ve gone up like crazy over the years. Have you seriously questioned why?

Why? Because you have more people on the telephone, of course. That’s the obvious answer, but it may be so obvious that you don’t look further. The fact is that not all telephone charges are created equal. Some are difficult to avoid and a necessary part of doing business. Others can be eliminated through the use of better technology. The technology that works this magic is called unified communications. Let’s take a look at a quick animation that explains everything...



Here are some important points made in the video and how they apply to you. Unified communications is all about merging your voice, data and video networks into one unified network. Many businesses can save money by doing this, even if they are smaller companies and even if they have only one location. Not mentioned is the hosted PBX solution that works especially well for smaller companies that don’t have a large IT staff.

The real cost cutting comes from consolidating the communications across multiple business locations. Some companies grow linearly with optimization every step of the way. Most don’t. If any of your growth has been from mergers and acquisitions, you can be pretty certain that your telephone network is not anywhere close to optimized. That’s probably true to some extent even if all you’ve done is add branch offices.

Why? Because the tendency is to have a phone system at each location. That means a stand-along PBX with trunks to the local phone company and different bills from different providers at each location. Then there’s the matter of communication among locations and back to headquarters. Chances are that this is done by making long distance phone calls and incurring long distance phone charges. Ding-ding-ding. You can just hear those telcos ringing the registers.

What’s better optimized? Moving your voice communications, i.e. telephone calls, from their own individual networks to your main corporate network that interconnects all locations. You need it for data anyway. Why not let voice packets piggyback on the same network?

What happens with this arrangement is that all your internal calls are free of charge. The phone company can’t charge you if you don’t use their network. So, stay off the PSTN (Public Switched Telephone Network) until you absolutely have to use it. That’s for outside calls to other companies or your own customers.

By letting a major competitive carrier, like Level 3, be your network and phone service provider, you can get by with a single IP PBX located somewhere on the network to route outside calls through one set of PSTN trunk lines. Level 3 has the advantage of being licensed as a competitive phone company in all 50 states, so they can get you local numbers wherever you want to establish a presence.

Is it really possible to save 50% of your phone bill by using unified communications? It can be that lucrative. How much can your operation save? Get competitive quotes for unified communications SIP trunking for all your business locations and see just how far your eyes bug out at the answer.

Ethernet over TDM

You’ve heard of Ethernet over Copper and Ethernet over Fiber, but have you heard of Ethernet over TDM? Here’s why it’s good to be familiar with this technology and what it can do for you.

TDM stands for Time Division Multiplexing. It’s the basis of T1 lines and SONET fiber optic carrier services. TDM was the chosen protocol of the Public Switched Telephone Network (PSTN) when the decision was made to transition from analog to digital mid-20th century. It is still important is because it is still around and going strong.

TDM is a way to transmit multiple signals on one digital line or wireless channel. The way TDM works is that a digital transmission is divided up into timeslots. Each timeslot contains the digitized information for one signal. All the timeslots are linked together like railroad cars into a frame that contains all of the digital bits, end to end. This frame is then transmitted from source to destination. Once one frame is sent another immediately follows.

Think of TDM as a round-robin polling process. You take a chunk of information from one source, then a chunk from another source, and so on. When you’ve got something from all sources that you wish to multiplex, then you start over with the first source again. That way you always have fresh data from frame to frame.

What TDM did for the phone companies was to pack 24 separate telephone calls onto one T1 line instead of 24 separate telephone wires. The multiplexing process combines all calls into one bitstream that is sent down the physical copper wires. At the other end, a complementary process called demultiplexing separates the individual calls so they can be used by particular telephones.

Ethernet is not a TDM process. Instead, it bundles bits of data into packages called packets. The packets are sent on their way individually when they are ready. There’s no assembling the packets into a multiplexed “train” so that they can all travel together. Each packet is switched and routed individually.

From the sound of it, you would think that TDM circuits, like T1 lines, and packet switched circuits, like Ethernet over Copper, would be incompatible. It’s true that they are completely different technologies and don’t exist on the same piece of wire at the same time. That would really create a mess and you’d get completely jumbled up data. However, clever engineering can let one protocol carry another. This is where the idea of Ethernet over TDM comes about.

How Ethernet over TDM works is that the underlying transmission protocol is TDM. A typical example is a T1 line. The T1 frames are transmitted at a rate of 1.5 Mbps from source to destination. Ethernet packets are loaded into those T1 frames. In this case all the claptrap associated with dividing the T1 line into 24 separate channels is ignored. The internal channels are combined so that Ethernet packets can use the entire frame. The T1 timing and waveforms are preserved so that T1 interfaces and signal regenerators will work as-is.

Why go to all this trouble to piggyback Ethernet on top of a T1 TDM system? It’s to give you more options. Ethernet over Copper is a distance limited technology that works great within a couple of miles from the central office, but loses signal strength and bandwidth fast as you get farther away. T1 has fewer distance limitations and delivers a steady bandwidth of 1.5 Mbps even out into rural areas. As a newer development, Ethernet over Copper is also less available than T1 lines that have been around for 50 years or more.

So, if you want the advantages of Ethernet that include bandwidth scalability, easy interfacing to your network, and standardized services such as Ethernet Line and Ethernet LAN, but can’t get Ethernet over Copper or Ethernet over Fiber, consider Ethernet over TDM. This is also known as Ethernet over T1 or Ethernet over DS1. Check pricing and availability on all Copper Ethernet Services now.

IP Exchange - The Final Piece For VoIP

It’s no secret that the world’s telephone communications are on a fast path from circuit switched to packet switched networks. Large businesses have embraced enterprise VoIP as a way to improve productivity, reduce costs and future-proof their in-house telephone systems. Small and medium businesses are taking a close look at SIP trunking as a way to get high quality telephone and broadband service as a bundle. Consumers have taken matters into their own hands by moving to Cable broadband-telephone bundles or third party VoIP services. Yet, the PSTN persists.

What’s holding up this house of cards? Right now every VoIP system and service is an island unto itself. You’ll more often than not find that on-net calls for any particular VoIP service are free. On-net means on that particular service, unrelated to location. This is because the provider owns the network and doesn’t have to pay anyone else to handle the traffic. They are making money through the monthly fee they charge their customers for the VoIP service itself.

The same is true for large companies with their own enterprise VoIP systems. One of the big cost advantages of VoIP is that you can eliminate the separate telephone network and use your data network to transport voice, data and video. Another savings comes from keeping your voice traffic on your own network, not just within an office but also between locations. Avoid the public telephone network and you avoid the per minute charges to use it.

Therein lies the rub. The only common link between all telephones on Earth is the PSTN or Public Switched Telephone Network. Its legacy is based on switching analog phone circuits to make the phone to phone connections. Long haul circuits have long since gone digital, but a very special type of digital. The phone conversations are digitized according to an international standard, G.711, and packed into rigidly synchronized channels called DS0s. A DS0 is 64 Kbps and is the same whether being transported on a T1 or PRI trunk line right on up to a fiber optic OC-768 cable. Cellular phones have their own network standards, but are designed to interface with the PSTN to hand-off traffic.

The heart of the PSTN is both its technical specs for connecting analog and digital conversations and its switching systems called SS7. Nowadays the switching signals have their own separate paths between switching offices in a hierarchy consisting of local central offices and tandem offices that connect the local offices into one large universal network. If you want to connect with any phone on the PSTN, you need to send the signals according to the SS7 protocol.

VoIP comes as an outgrowth of the computers networking industry rather than the telephone industry. Its technology is based on IP packets and SIP switching rather than pulse code modulation channels and SS7. As you might expect, you can’t directly connect one system to the other. Analog and VoIP phone systems, including business PBX systems, connect or “terminate” their calls to the PSTN. The PSTN SS7 switches take care of getting the conversations connected from one proprietary network to another. Each time a call has to traverse the PSTN, there is a small but significant per minute access charge.

TW Telecom, a major competitive carrier, is looking to give the telephone system a nudge in the direction of eliminating the SS7 switching step. According to a recent report in Connected Planet, they are asking the FCC to classify voice calls over IP as a telecom service rather than the current status as an information service. That would get incumbent telephone companies, the heart of the old Bell system, to connect phone calls on an IP to IP basis. The benefits would include higher voice quality by eliminating the protocol conversions and lower network compensation costs.

TW’s actions are the first step in a process of creating IP Exchanges, similar to Ethernet Exchanges that share traffic between network providers and extending the reach of all Ethernet networks. It’s a matter of standardizing protocols and fees so that you have a level playing field without technical hiccups. It’s not the end of the beginning, but the beginning of the end for SS7.

VoIP Phone Service Provides Flexibility

Small to medium size businesses may be thinking about upgrading their aging phone systems, but uncertain about which way to go. Do they buy a modernized and expanded version of the Key Telephone or PBX system they are using and keep everything else the same, or make the jump to VoIP phone service? What many may not realize is the flexibility of options you gain with VoIP solutions.

What differentiates VoIP from traditional telephone equipment and service is that it is network based. True, even a single line analog desk phone or cell phone is part of a network - the Public Switched Telephone Network (PSTN). The public telephone network is a very specific network that does one thing really well. It connects one telephone to another or perhaps one phone to a group of other phones for a conference call. It has its own technology and wiring standards. VoIP, on the other hand, is designed to share standard packet based computer networks.

There-in lies the flexibility of VoIP. You plug an IP phone into a network jack, just like you’d plug in a PC or printer. No separate wiring scheme is needed. It doesn’t even matter where the phone is located. IP phones are known by their unique addresses, not which pair of wires they happen to be connected to.

With analog telephones, you have a choice on whether to connect each of your phones to the telephone company on their own line or to install an in-house phone system to connect the phones and share the outside lines. With VoIP, you can also install an in-house phone system called an IP PBX or extend your network with all the phones to a service provider. This approach is called Hosted VoIP or Hosted PBX. The connection is called a SIP Trunk.

SIP Trunking gives smaller businesses the option of getting both their phone service and broadband service from the same provider. The SIP trunk can be divided so that voice packets and data packets don’t interfere. Your phone calls are never interrupted by someone download data at the same time. Using one trunk for both voice and data often results in a cost savings over having separate telephone lines and broadband connections.

Hosted PBX services give you the flexibility of locating your phones wherever you want them. This goes beyond just moving telephones around the building. You can have one phone sitting on a desk in New York and other in Seattle, both connected by SIP trunks to a hosted PBX in Dallas. From the caller’s perspective, all of this equipment could be in one building. They have no perception of how geographically spread out this operation is. This capability is also known as a virtual office.

For larger companies, enterprise level VoIP systems handle hundreds or even thousands of phones located at headquarters, regional sales offices and branch offices nationwide. Private SIP Trunks securely transport voice and data among the locations, avoiding telephone company toll charges for in-house calls. The PBX switching system can be located at any particular location or can be a hosted solution. The beauty of hosted VoIP is that you pay as you go. There is no need for an expensive investment in telephone switching equipment nor the staff to maintain and upgrade it. That’s all handled for you.

Can your company benefit from a more flexible communications system, perhaps including mobile phones as well as desk sets? If so, get pricing and features quotes for competing VoIP service providers. Then compare with what you have now and see if you can gain flexibility and perhaps cost savings as well.

Where Hosted PBX Solutions Save

Business telephone systems range from the very simple with a few phones and a few lines to complex private branch exchanges that support multiple sites. The new approach is a hosted PBX that makes things simple again. But do hosted PBX solutions really save anything and can they maintain voice quality?

With the simplest arrangement of a single landline phone connected to the local phone company, there really isn’t much to manage. You pay so much per month for “dial tone” that makes your phone work and gives you typically unlimited local calling. You have the option to switch to a different provider for long distance service or use a dial-around service for international calling. These are options to save you on the per minute calling rates.

The basic analog or POTS (Plain Old Telephone Service) phone service seems simple because all the complexity is at the other end of the wire. What you don’t see or have to deal with is the intricacies of connecting your line to any of billions worldwide or to even more billions of wireless callers. If you have, say, 3 business locations with 1 phone each, they talk to each other by dialing up the desired location just like any other phone number.

Businesses found out just how complex the PSTN (Public Switched Telephone Network) was when they got big enough to have lots of desk phones and a dozen or more outside lines. What many companies did was to buy their own telephone switching system called a PBX (Private Branch Exchange.) The advantage of having your own PBX system is that calls within the company stay on your own wiring and you don’t have to pay the telephone company to connect them. That includes more complex PBX arrangements with digital tie lines that connect multiple locations in a private network. Once again, the motivation is to keep as many calls as possible off the public network to avoid “toll” charges.

Many companies have rued the day the got into the telephone business. PBX systems are expensive to buy and need constant updates as employees move within the company. There is also maintenance activity for both the PBX and its telephone network wiring.

Hosted PBX is a fairly new service that offers to offload the expense of in-house phone systems. It only became possible when most companies installed Local Area Networks for their computers and the price of private digital lines became affordable. The enabling technology is VoIP or Voice over Internet Protocol. In this case, Internet refers to the technology standard and not necessarily use of the public Internet.

Hosted PBX refers to using a large PBX telephone system that is located or hosted by a third-party service provider. This PBX is big enough to handle the telephone traffic of many different companies to gain an economy of scale. In a way, this is similar to going back to the days where each phone was individually connected to a local telephone company that took care of call switching.

So, where does the cost savings come from? Network consolidation is one area. Both telephones and computers run on a single converged voice and data network. There are no separate telephone wires. This network is extended to the hosted PBX provider using a private digital line called a SIP trunk. You are not tied to a particular service provider. There are many competing hosted PBX solutions and that competition is another way that cost savings can be offered.

The private SIP trunk helps to maintain high voice quality because it provides the characteristics of low latency, jitter, packet loss and congestion, along with quality of service mechanisms that keep data packets from interfering with voice packets. You can also buy Internet based hosted PBX services at lower costs, but the vagaries of the public Internet can introduce distortion and clipping in the conversations.

Do hosted PBX solutions offer a real cost savings for your company? It depends on how many seats you have, what features you want and what your existing system is costing you. If you are close to replacing an aging PBX or one that has run out of capacity, the economics highly favor hosted solutions. To decide for yourself, get competitive pricing on hosted PBX solutions for business. It may come down to whether you want to pay as you go versus investing in your own in-house phone system.

Enterprise Cloud Communications Arrives

Cloud computing has been in the headlines as the next generation of information technology. What’s breaking out now is cloud communications, a move to make telephony as well as number crunching and file serving available as cloud services. You know it’s arrived when a provider the size of XO Communications launches an enterprise level cloud communications service.

In an odd way, what’s new is old. The origin of telephone services is in a cloud called the PSTN or Public Switched Telephone Network. Your basic phone is simply a client that derives its functionality from the massive telco switching network.

Then came in-house phone systems in the form of key telephone systems and PBX or Private Branch Exchange systems. These are essentially small phone companies that you own and maintain. All calls within the company stay on the internal system. It’s only when you need connectivity to the outside world that you have to rejoin the PSTN.

Telephone services are now moving back to the cloud, but with a difference. This time it's IP communications rather than switched circuits. It’s also not about a monolithic public network but private networking services with competitive features that go way beyond what the original telephone network was engineered to provide.

The new cloud communications offerings also go by the title of hosted PBX. The idea is that it is more efficient to establish a large IP switching center with a dedicated expert staff than for every business to be its own telephone company. The business users need only have the telephone handsets, speakerphone and similar desk equipment connected to their local networks. The large, expensive and hard to maintain switch moves out to the cloud.

Therein lies the key to cloud communications. It’s the rise of converged IP networks to handle voice, video and data, replacing separate dedicated networks for each. Once you’ve installed SIP phones on your LAN, it seems a bit inefficient to send that traffic to an in-house IP PBX system that connects to the PSTN with specialized analog and digital trunk lines. Why not keep all of the traffic on the converged network as long as possible?

That’s what XO says. They’ve built their business by creating an enormous fiber optic network footprint to provide digital connectivity to both businesses and other service providers. With an extensive converged network already in place, it’s logical for XO to add value by providing telephony solutions in their cloud. This way you have only one supplier for both network connectivity and the communication services running on that network.

The enterprise cloud communications model works especially well for companies with more than one business location. XO can tie your headquarters, regional offices and branches together as if they were in a single large facility. The converged WAN network give you all the standard calling features you expect in an enterprise telephone system plus high definition video conferencing and the ability to include mobile phones in a unified communications system. These communications services are priced on a per-seat-per-month basis.

Are you interested in upgrading your business communications while avoiding a massive capital investment? Look into future proofing your voice, data and video with hosted services in the cloud. Get pricing, features and availability on SMB and enterprise cloud communications services now.



Note: Photo of clouds and building courtesy of Wikimedia Commons.

Ethernet Exchange For Miami, Dallas and Los Angeles

It’s becoming increasingly apparent that the replacement for the Public Switched Telephone Network may well be Carrier Ethernet. More evidence for this is the expansion of Ethernet Exchanges that allow carriers to transport each other’s traffic. Telx, a major colocation and interconnection service company, has just added Miami, Dallas and Los Angeles to its suite of Ethernet Exchange facilities nationwide. Let’s take a look at why Ethernet Exchange matters and how it influences the direction of international wide area networking.

The century long dominance of the PSTN or Public Switched Telephone Network can be attributed to its universal acceptance. Every phone can connect to every other phone in the world and work correctly. This network has been adapted for data and well as voice service for worldwide connectivity. It’s a circuit switched rather than packet switched network, but with proper interfacing and protocol conversion it gets the job done.

Another model of universal connectivity is the Internet. The Internet is an IP network that is based on packet switching rather than circuit switching. Isn’t the Internet the model to emulate for the next generation in commercial connectivity?

Actually neither the PSTN nor the Internet are ideal for high performance network services. The PSTN has a telephone legacy and is organized around small independent channels bundled together to create larger amounts of bandwidth. It’s also a different set of protocols than are running on a majority of the world’s data networks. The Internet was designed by the government for survivability in the event of war or natural disaster. As such, it’s so autonomous that routes can change spontaneously and there is no such thing as class of service or guarantee of bandwidth, jitter, latency or packet loss.

Carrier Ethernet seems like the ideal protocol for today’s metropolitan and long haul networking. After all, the network most likely to need transport is running Ethernet in the LAN. More and more, that’s converged voice, data and video over Ethernet. When you go to the trouble of carefully engineering your internal networks, it only makes sense to expect to link those networks transparently.

The only fly in the ointment has been network reach. The companies most active in deploying Carrier Ethernet services have not had protected monopolies like the old telcos nor government R&D like the Internet. These are commercial companies, some with legacy telco assets and some with all-new IP core fiber optic networks. While each competitor may have thousands of buildings on-net, nobody blankets the Earth.

Here enters the Ethernet Exchange. The idea is a facility that enables Ethernet network operators to exchange traffic. By doing this, each carrier increases the reach of its network into the footprint of other carriers. Even Ethernet Exchanges can partner. Telx has a partnership with Neutral Tandem to provide access to each other’s exchange locations.

With demand for Ethernet services growing rapidly each year, cooperation benefits all parties involved in transporting high bandwidth Metro and Carrier Ethernet services. Ethernet connections are now available in metropolitan areas throughout the US and in many countries around the world. The cost advantage, scalability and portfolio of services available with Ethernet is working to establish Ethernet as the new WAN networking standard at the expense of legacy telecom services.

Have you been missing out by not taking advantage of Ethernet connectivity for your business? Get pricing and availability for Ethernet network services now. You may be surprised by what’s become available only recently.

Smoothstone’s Converged IP Cloud Expanding To Europe

Smoothstone IP Communications, an innovator in the new field of cloud-based unified communications, is expanding its service portfolio to include European locations. Could this be the start of a cloud that covers the Earth?

You bet it is. Thanks to international MPLS connectivity, it is now feasible to port any IP service to anywhere on Earth. That’s the beauty of MPLS networks. They take whatever you’ve got and transport it anywhere users can connect to the network.

Well, it’s not quite that simple. There’s a matter of scaling involved. Servers that easily handle the load for a limited universe of users in a regional area can become quickly overloaded when a tsunami of new users joins the network from a global footprint. Likewise, the core network has to have the bandwidth needed to handle the increased traffic without degrading latency, jitter and packet loss characteristics.

Smoothstone has addressed these issues, partially by expanding their cloud-based applications platform into several European data centers. That removes a potential bottleneck that could form if all packets needed to be processed through a single U.S. data center. It also makes call termination to off-net European phones easier and less costly.

One of the advantages that Smoothstone touts for moving enterprise voice services to their IP cloud is that internal phone calls stay on the network even when those calls are transatlantic to the UK, France, Germany or Switzerland. It’s only when calls need to be terminated to the PSTN (Public Switched Telephone Network) that connection costs are incurred. The more local the call termination, the cheaper it is. That argues for geographically diverse data centers and central office equipment to support telephony in the cloud.

What is also significant is that Smoothstone is not merely another VoIP service provider. The heart of their competitive portfolio is unified IP communications services. That means converged voice and data services to gain the cost advantages that come from deploying one network among business locations rather that separate telephone and data networks. Convergence can be a tricky proposition for time sensitive applications like network voice. If not done properly, VoIP calls can degrade into clipped and garbled conversations. Calls can even be dropped in extreme cases.

MPLS networking is especially suited to supporting converged voice and data. Not only are multiple protocols supported, but these privately owned and operated networks are carefully managed to ensure Quality of Service (QoS) at all times. For companies that want to unify their communications among multiple locations, it’s hard to argue against a solid MPLS core network. Now smoothstone is taking a leadership position to expand the very same converged services to include European cities. By the end of 2010, they expect to be providing applications and services across Europe.

Is your company still suffering from last century’s networking solutions? Have you been stymied by the process of creating unified communications that delivers the quality of service you require? What you need is the right provider with assets and resources to deliver the right solution for your size of operation and be able to seamlessly scale up as your business level increases. See how Smoothstone and other cloud networking services can provide the connectivity you need at a cost that makes sense.

How Voice over MPLS Expands Enterprise VoIP

Medium and large enterprises have been converting from traditional telephone and computer connections to VoIP over converged networks. The reasons are higher productivity and lower costs. But what happens when you connect your phones and computer network to the outside world? Do you lose the advantage of your enterprise VoIP technology?

Sadly, for some businesses, this is the case. Everything is efficiently connected over a high performance local area network. That network stops at the edge of the premises. In order to connect with other business locations, both voice and data must be transmitted over common carrier telecom services. This is true for each location. There is one architecture for the internal network and quite a different one for the transport service.

Typical interfaces include a PBX telephone system that connects to multiple outside telephone lines. These may be individual analog business lines or a digital ISDN PRI trunk line. In either case, the PSTN or Public Switched Telephone Network is used to make calls to both outside phones and the phone systems of the other company locations.

Computer networking is handled with point to point dedicated lines, often set up in a star network with headquarters doing the routing for all locations. This works well, but can be quite expensive when locations are on different coasts or in nearly every state. Add international locations and costs skyrocket.

What’s a better solution? The latest technology is MPLS networking. An MPLS network is a privately operated “cloud” network that uses a special tag switching system instead of IP routers to manage traffic. MPLS networks offer quality of service mechanisms so that real-time traffic, like voice and video, are unaffected by simultaneous data file transfers. That makes MPLS networks ideally suited to extending converged networks among as many locations as needed.

How can this benefit your organization? By interconnecting all of your locations through an MPLS network, you can create a seamless internal voice and data network for telephones and computer connections. Using an MPLS network to carry telephone traffic is known as VoMPLS or Voice over MPLS.

With VoMPLS, all of your internal telephone calls stay off the public phone network and you avoid toll charges. Only when you need to make an outside call do you need to connect to the PSTN. This can be an enormous cost savings compared to your monthly phone bill now. Similarly, the cost of using an MPLS network for file transfers can be considerably less than the cost of all those dedicated lines and the effort it takes to maintain a proprietary network. Plus, any productivity enhancements you’ve achieved by converging your voice and data networks can be shared among your other business locations.

Can Voice over MPLS technology offer you a significant cost reduction? Why now get cost quotes for a VoMPLS networking solution to links all of your business locations? The savings and performance can be impressive.

What is a PRI in VoIP?

We tend to think of VoIP as a “new generation” phone service based on IP technology unrelated to the historical public switched telephone network. Well there’s some truth in that, but no matter what you implement you’ll still be dealing with the good old PSTN. The bigger your company or organization, the more “outside” phone lines you’ll need. You should take a close look at ISDN PRI to make the connection to all the phones that are not part of your enterprise VoIP telephone system.

What is a PRI? It stands for Primary Rate Interface. That’s telephony talk for a particular standard related to another telephone industry term, ISDN. ISDN is the Integrated Services Digital Network. There’s a history to the development of ISDN that relates to the once lofty ambition of replacing all analog home and business phone lines with digital versions. You may not have heard of this, as it fizzled when broadband Internet came along and usurped the data role intended for ISDN. Even so, the business version persists and is more popular now than ever. That’s what’s called PRI or ISDN PRI or even T1 PRI.

Why T1 PRI? It’s because ISDN PRI is physically transported on a T1 line. T1 is another telephone industry standard widely used in business for dedicated Internet and point to point data connections. T1 lines have the advantages of being provisioned on copper wires so you don’t need fiber optics installed. They can be extended to nearly any distance, are highly reliable and reasonably priced. The pricing has gotten really attractive lately due to all the competition in the industry. With all this going for it, T1 makes a great choice to carry PRI.

What’s different between a regular T1 line and a T1 PRI line? The line speeds and voltages are the same. What differentiates a PRI is how it is organized. Instead of a big chunk of bandwidth, ISDN PRI is set up as 23 channels that each represent one digital telephone line. A 24th channel is used for signaling and data such as Caller ID. It’s an upgrade to an older T1 telephone standard that was set up as 24 phone channels and no Caller ID.

The beauty of bringing in an ISDN PRI line or “trunk”, as it is called, is that you get 23 outside phone lines coming in on a single digital line. It’s a lot more compact and is almost always cheaper, usually a lot cheaper, than dealing with 24 individual analog business lines.

The interface is also generally very easy. Most PBX and IP PBX telephone systems either come with ISDN PRI capability or offer it through a plug-in module you can buy. All the circuitry to convert between 23 individual phone lines and the PRI digital trunk are implement on that circuit board. You simply plug-in one or more ISDN PRI lines and you have outside phone lines and a lot of them.

But why would you connect a T1 PRI to a VoIP phone system rather than keep it 100% VoIP? The simple explanation is that the rest of the world isn’t serviced by VoIP or at least the same VoIP provider. The only thing universal is the PSTN, where you can dial any number and get connected to any telephone in the world. Your enterprise VoIP phone system can save you a bundle on internal calls that stay on your own network. You can also buy a SIP Trunk that connects you to a telephone service provider completely in IP or Internet Protocol. But, guess what happens at that service provider when you want to call an outside number? That’s right. You’ll be switched through to the ISDN PRI lines that connect them to the public phone network.

Which is the best deal for your company when it comes to analog (POTS) phone lines, ISDN PRI or SIP trunking? Why not let an expert consultant get you competitive quotes for these various options so you make an informed decision? The service is fast, easy and free.

Managed Voice over MPLS For High Quality Enterprise Telephony

Companies with multiple locations are rapidly discovering the cost and performance advantages of MPLS networks. MPLS VPN networks are becoming the preferred way to interconnect multiple sites around the country and around the world. But what do you do about your voice services?


The traditional approach is to keep voice and data separate. The telephone system has a proven legacy based on switched circuit analog and digital trunking. Most PBX systems are set up to interface to standardized copper pair analog business lines or ISDN PRI digital trunks. These are your portal to the worldwide PSTN or Public Switched Telephone Network that links every telephone set on Earth.

This traditional approach to business telephony has the advantage of guaranteed connectivity and proven voice quality. The incentive to change to something more advanced comes from potential cost savings and productivity features.

There are huge cost savings possible if you can combine your voice and data networks and keep your internal phone calls off the PSTN. Isn’t that what Enterprise VoIP about? That’s exactly what many major corporations are doing. But only well-healed companies can afford to manage their own nationwide converged private line networks. When it comes to international connections, the costs can go up dramatically. Is there a more cost effective option?

Why not use the same MPLS networks that provide data connectivity for your many geographically diverse sites to also carry your voice traffic? Well, why not? MPLS networks already have the requisite quality of service controls to ensure that voice packets won’t get trampled by data packets. The entire network is managed to ensure low latency, jitter and packet loss. It seems like a good match for IP telephony.

Indeed it is. That’s what VoMPLS or Voice over MPLS is all about. With VoMPLS, your internal telephone traffic stays on your own network. In fact, it’s the same network that interconnects all your PCs and other network device. You’ll only pay per-minute telephone charges when your calls have to go “off net” to the public phone system. You can make that connection yourself with ISDN PRI trunks connected to your company PBX or you can outsource call termination to a SIP trunking service.

Does VoMPLS make sense for your company or organization? New services, including one just announced by AireSpring, are making this option the best cost/performance choice more and more. Find out with a quick inquiry about Voice over MPLS network options.