Why Symmetric Bandwidth?

By: John Shepler

Bandwidth is bandwidth and the more the better, right? Well, not so fast. There is bandwidth and then there is bandwidth. All connectivity solutions are not the same. Let’s see why.

Sharing Isn’t Always Caring
Some connections are dedicated. Some are shared. You need to know which you are ordering.

A dedicated connection means a fixed amount of bandwidth that you are contracted for and are guaranteed to have all the time. The classic T1 line, SONET fiber optic, and many Ethernet over Fiber and private wireless solutions are dedicated. They may be set up as point to point private lines , cloud connections or last mile Internet access.

The advantage of dedicated lines is that your network capacity is always there even when you are not loading it up to the max. This improves latency and congestion compared to your other choice, shared bandwidth.

Shared bandwidth connections have other company’s traffic on the same line as yours. You have no idea how many there are or what they are doing. You may well feel their presence, however, as your WAN connection speeds up and slows down for unknown reasons.

So, why on Earth would you share bandwidth? Simply to save cost. Shared lines are dedicated lines that the carrier has sliced and diced to support many users instead of just one. If there is enough bandwidth and not so many users, you may not have a problem and can save considerably on monthly rates. Typical shared bandwidth services include cable broadband, wireless 4G LTE and 5G, and some passive optical fiber optic services that are available at bargain rates.

Symmetric vs Asymmetric Bandwidth
Symmetric bandwidth is when you upload and download speeds are the same. Asymmetric bandwidth means that one direction has much more capacity than the other. The high speed link is almost always the download path. Download speeds may be 10x faster than upload speeds.

Why? Asymmetric setups were designed to mimic the way people actually use the Internet. For the most part you download videos much more often than upload them. You enter short addresses in your browser and download web pages and content far more than you upload them. Or… Do you?

Business users may use their networks much more symmetrically than typical residential users. Business users likely transfer large files back and forth. Many of their applications reside in the cloud with data flowing up and down. VoIP phone and video conferencing are inherently symmetrical. Voice and images go both ways. Remote back-up is asymmetric for the most part… but the other way. Most data is being uploaded to the remote storage.

Traditional telecom networks are designed with symmetric bandwidth in mind. Consumer solutions, which are also typically shared bandwidth, are asymmetric in nature. For casual users and small businesses this may not be an issue. However if you are a heavy bandwidth user, depend on software as a service, do extensive video conferences or back-up your data to remote storage, you will likely be better served with symmetric and dedicated solutions.

Is your business running out of bandwidth or are you just frustrated with the solution you have now? Discuss your real needs with a technology expert and get quotes for multiple options that will work for you. There’s more available and at better prices than you think.

Private Point to Point Connections

By: John Shepler

Sometimes you need to get your traffic from Point A to Point B with as much security and transparency as possible. Let’s look at popular options to do just that.

What Are Dedicated Private Lines?
You can think of a dedicated private line as a connection between two locations that goes through a carrier. This is what you need if you can't just string the wires between buildings on your own campus. The private line acts like your own wiring, except that it is provided by another company. Private lines can go across town, between cities, or even around the world.

T1 Dedicated Lines
T1 lines are the digital equivalent of the old “dry loops” or “equalized loops” that phone companies leased to radio stations and burglar alarm companies. A dedicated T1 point to point line goes between two locations using telco twisted pair wiring. You need routers or other equipment with the T1 interface at each end.

T1 dedicated lines offer 1.5 Mbps in both directions with no usage limits. A popular application is audio transport such as studio to transmitter links (STL) for radio stations.

T1 dedicated lines are still used for cellular traffic backhaul. They were extremely popular prior to 4G LTE, which really needs more bandwidth than you get with T1. In some cases, multiple T1 lines can be bonded together to create a larger bandwidth solution. Where fiber is unavailable, it is possible to get 10 or 12 Mbps from bonded T1 lines.

DS3 Dedicated
The next step up in traditional TDM telecom circuits is the T3 or DS3 dedicated line. These offer 45 Mbps upload / download private links. DS3/T3 is considered a copper-based service. In actuality, most of the transmission distance is handled over OC3 or other SONET fiber optic circuits, with only the curb connection carried by dual coaxial copper cables.

Ethernet over Copper
Ethernet over Copper (EoC) is a technical improvement on T1, while using the same twisted pair infrastructure. EoC easily offers bandwidths in the 1 to 10 Mbps range, with some systems delivering up to 50 or even 100 Mbps over relatively short distances. If available, you may find that you can replace a bonded T1 solution or DS3 circuit with EoC for a considerable cost savings.

Fiber Optic Dedicated Lines
Higher bandwidths are more and more in demand. Fortunately, fiber optic private lines are more affordable than in years past. There are two technologies of interest, although it may not make much difference in performance which you choose. SONET is the legacy telco standard, with services such as OC3, OC12 and OC48 providing different bandwidth options. Ethernet over Fiber is the technical upgrade to SONET. It offers advantages of being easily scalable from 10 Mbps up to 10 Gbps or higher, and is usually the lower cost solution.

Virtual Private Lines
The Internet offers lower cost solutions to interconnect multiple locations, but it is far from dedicated or private. The attractive pricing comes from being a shared resource with universal connectivity available nearly everywhere in the world. You can’t do much about the fact that the bandwidth is shared and not dedicated to your own use, which might affect the performance of your applications. The lack of privacy can be addressed by encrypting your traffic which effectively creates a private “tunnel” or VPN through the Internet.

A more robust solution is provided by MPLS networks. These can be thought of as privately run versions of the Internet that connect only businesses and not the general public. Proprietary protocols are used for routing traffic on the network, which adds security to the transmissions. MPLS networks are often described as MPLS VPN. Network capacity and performance are actively managed by the network operator so that a shared core network can perform like a private line, Over long distances, MPLS offers considerable cost savings over a dedicated copper or fiber connection.

Do you need a high performance dedicated private line connection to support your critical application? If so, get pricing and tradeoffs available for a variety of private line solutions available to your business locations.