Specifications

Reference Guide
2-43
Applications ATM Server Card
•
Analog PBXs/Key Systems
•
Digital PBXs
•
Nx56K/64K Data terminal equipment
•
Video Codecs
•
Transparent LAN Extension
2.9.1 Legacy Adaptation to ATM
The addition of the ATM Server card further extends the capabilities of the integrated access
platform by efficiently provisioning a multitude of legacy services for transportation over an
ATM network as shown in Figure 2-27.
There are still many legacy services (PBXs, key systems, video codecs etc.) which need a
parallel TDM network to operate since they are not “ATM-ready.” Two parallel networks
drive up the cost of installation, operation and maintenance. Since businesses have very
significant capital investment in these legacy systems and processes they cannot justifiably be
fork lifted and replaced by equivalent “ATM-ready” equipment. Furthermore, when a new
ATM campus network is deployed, typically there is excess bandwidth and port capacity that
is under utilized. What needs to be added is a cost-effective product for adaptation of all these
legacy services to ATM. This would enable connecting a multitude of “non-ATM ready”
equipment to the ATM network.
Figure 2-27. Migrating Legacy Networks to ATM
Router
DS3/STM1
ATM Edge Switch
ATM
Network
IAD