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Operation
The 9A128-01 and 9A129-01 provide bridging between the front panel SONET
ATM interface and one of the FDDI rings on the FNB backplane (FNB-1 or FNB-2)
as shown in Figure 3-1. The factory default configuration is bridging between the
front panel and FNB-1.
ATM
The 9A128-01 and 9A129-01 use a 155 Mbps SONET OC3 Fiber front panel
interface. The 9A128-01 is for multi-mode fiber and the 9A129-01 is for
single-mode fiber. The 9A128-01 and 9A129-01 are fully compatible with all ATM
Forum specifications, including UNI 3.0, ILMI and LAN Emulation. The 9A128-01
and 9A129-01 act as an ATM Forum LAN Emulation Client, allowing Ethernet
Token Ring and FDDI users to access an ATM backbone.
DC/DC
Converter
SONET
i960 PLUS Core
ATM
Interface
Figure 3-1. 9A128-01 and 9A129-01 Block Diagram
System
Diagnostic
Controller
Chapter 3
SMB-1
SMB-10
FNB-1 or
FNB-2
3-1
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