5 Mbps provided
from a T1 connection. This allows the deployment of 5, 10, 20, and even 40 Mbps services
using the multi-pair capabilities of 2BASE-TL. And with the automatic resiliency
Copper 145
provided by the EFM technologies, it??™s easy to see why so many carriers are looking to
cap T1/E1 deployments and deploy Mid-Band Ethernet going forward.
Finally, Mid-Band Ethernet can also be compared with simply running xDSL from
a traditional DSL Access Multiplexer (DSLAM). As with T1/E1s, two of the primary
economic benefits are simplicity and efficiency. When compared with ATM DSLAMs, a
Mid-Band Ethernet user can experience almost twice the throughput as an ATM/DSL
user just from the ATM inefficiency alone. The capital expenditures of ATM/DSL architectures
are also significantly higher than with Ethernet architectures. For example, an
ATM/OC3 port can cost ten times as much as a Gigabit Ethernet port, and provide just
a fraction of the capacity. Finally, there have been multiple studies that have compared
the operating savings of Ethernet versus ATM/DSL architectures and have concluded
that Ethernet can have an ongoing savings of 20??“25 percent in operating costs.
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