Wednesday, July 21, 2010

Covad and ADTRAN Make Everything Ethernet

The age of Carrier Ethernet is upon us. All the excitement these days is directed at IP core networks and Ethernet access solutions. So, does that mean that legacy TDM services must be abandoned in place? Not at all. With the right equipment, DS1 and DS3 circuits can be repurposed for Ethernet transport. Carrier Covad and equipment maker ADTRAN are doing just that.

ADTRAN Total Access 5000Covad is now deploying ADTRAN central office and network termination equipment to expand their Ethernet service area. Covad currently serves 44 states and 235 major markets with a core network that spans the nation. Their specialties have included business DSL, data T1, high bandwidth fixed wireless, bonded T1, and integrated voice and data with SIP, PRI and analog handoff. All of these are designed to serve the small and medium size business market. Ethernet is a natural addition to the Covad portfolio.

What’s special about the ADTRAN Carrier Ethernet solutions? It’s that they can pretty much press any existing line service into transporting Ethernet from the service provider to the end user. A service aggregation unit is installed at the central office to connect with the carrier’s Metro Ethernet and IP Core networks. For Covad, this is the Total Access 5000 MSAP (Multi-Service Access Platform). The aggregation unit brings in GigE or 10 GigE carrier bandwidth connections and apportions it to subscribers.

What makes this system so flexible is that the transport from CO to subscriber can be any of the common circuits already in place. These include DS3 and bonded DS3 bandwidth, T1 and bonded T1 lines, e.SHDSL bonded pairs. DS3 and T1 (DS1) are legacy service that are been used by many businesses for years. Ethernet over TDM or EoTDM allows service provider to keep those circuits in place and use them to provide Metro Ethernet or Carrier Ethernet services over an extensive area.

EoC or Ethernet over Copper has become very popular recently because it offers higher bandwidths and lower prices than traditional digital line services. The e.SHDSL technology can boost speed to 5.7 Mbps per e.SHDSL loop compared to 1.5 Mbps for T1. However, this is a distance limited technology that is typically extends no further than 9 km from the carrier’s point of presence.

An appropriate network termination unit is installed at the customer location. The companion product is the NetVanta 800 Series. These are configured for 2, 4, or 8 bonded e.SHDSL pairs, up to 3 bonded DS3 circuits for a maximum of 134 Mbps, or 2, 4 or 8 four-wire T1/E1 loops. In many cases, bonding multiple copper pair can bring in the bandwidth needed by businesses without the high cost of pulling-in fiber optic cable for a new installation. In many cases, fiber isn’t available nearby and isn’t really an option. Even so, 10 or 12 Mbps and up to 45 Mbps over existing copper wiring offers the requisite bandwidth at very reasonable costs.

Is your business straining at the limit of your current T1 line or dissatisfied with business DSL service? If so, you may find that Ethernet service from Covad and other top carriers is just what you need. Why not find out how much bandwidth you can get for your telecom dollar? It takes just a second to inquire and a knowledgeable consultant will be in contact quickly with prices and install times. Inquire about Carrier Ethernet for your business now.

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