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This soft copy for use by IBM employees only.
Figure 14. 8285 with ATM 12-Port 25 Mbps UTP Concentrator Modules as an Access
Switch
The third example shows how you can connect the ATM25 workgroup into the
backbone network to access additional high-speed resources using only the
standard ATM 155 Mbps uplink. In this capacity, the 8285 makes an excellent
ATM floor switch, especially when used in conjunction with the IBM 8260 Nways
Multiprotocol Switching Hub as the backbone or collapse-point switch.
By implementing a second backbone link (using either the ATM 2-Port 155 Mbps
Flexible Media Module or the ATM 3-Port 155 Mbps LAN Concentration Module)
connected to a different switch in the backbone, you can take advantage of the
additional bandwidth during normal operations, and provide availability to your
workgroup even if one of the collapse-point switches fails.
Chapter 4. IBM 8285 ATM Modules 41