Service providers are also lowering the price per bit for Ethernet bandwidth and offering
it at increments that make sense to customers, as opposed to jumping from T1
(1.5M) to 2 ?— T1 (3.0M) to 3 ?— T1 (4.5M) to T3 (45M) or similarly for E-carriers (E1 (2.0M)
to E3 (34M). Examples include Time Warner Telecom, Cogent, XO, Level 3, KT (Korea
Telecom), and large players such as BellSouth, British Telecom, France Telecom, NTT
East, and AT&T.
Corporate, government, and other organizational customers are demanding Ethernet
services, lower prices per bit, and the convenience of incremental bandwidth. Even
with CAPEX pressures, service providers must respond to customers or lose them to
competitors; this continues to drive Carrier Ethernet equipment sales.
108 Chapter 3
More carriers are expanding their Ethernet services, for example:
?– AT&T Ethernet Switched Service MAN provides high-speed bandwidth between
customer locations in a metro area, with logical network configurations between
locations (hub and spoke, partially meshed, and fully meshed) and speeds from
50M to 1G.
?– AT&T Local Private Line Service offers point-to-point, fixed-bandwidth Ethernet
transport (50M to 1G) between two locations within a metro area, transported over
AT&T??™s Local Network Services SONET backbone network, with a latency rate of
less than 10 ms and recovery in less than 50 ms.
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