Lucent Technologies DDM-2000 OC-3, User & Service Manual

Page: 137 / 2536

363-206-285
Applications
Issue 3 June 2001 2-55
LAN/WAN Data Networking 2
Increasing demands for data and multimedia applications have led to a significant
growth in local area network (LAN) service needs among business customers. To
transport these LAN data services over the public network, LAN routers and
concentrators collect the data at a LAN location and the LAN circuit pack maps it
with 1 to 8 DS1 transmission signals using the ATM forum IMA protocol. These
DS1 signals can then be transmitted over an Access/Transport Network to
another location where the data can be dropped to a LAN circuit pack (see
Figure 2-38). DDM-2000 OC-3 Multiplexers are ideally suited to serving the
growing demands for such LAN services. The DS1s from the LAN circuit pack can
also be multiplexed into a DS3 by a transmultiplexer (TMUX) circuit pack (see
Figure 2-39) and connected to an ATM edge switch that supports the IMA protocol
for transmission over the ATM transport ATM transport network or a facilities ring
SONET network. Using such an approach, DDM-2000 OC-3 Multiplexers can
provide the necessary transport and bandwidth management capabilities to meet
the business customer LAN interconnect service needs. Delivering LAN
interconnect services using DDM-2000 provides the same high level of reliability
and availability for these services as is supported for all other premium business
services. Beginning with Release 15.0, the Low Speed slots of the DDM-2000
OC-3 shelf will support the LAN circuit pack to be used to interconnect a LAN
through its IEEE standard 802.3 compliant interface.