Specifications

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Cisco IGX 8400 Series Provisioning Guide, Release 9.3.3 and Later Releases
OL-1166-04
Chapter 2 Cisco IGX 8400 Series Cards
Universal Frame Module
In addition to features supported by the UFM-C (see the “UFM-C Front Cards” section on page 2-51),
the UFM-U front card has the following features:
• A clock rate sum up to 24 MHz (regardless of actual throughput)
• Supports looped clocks (with the V.35 back card only)
• Supports Y-cable redundancy on all ports (V.35 and X.21 back cards) or on one port (HSSI back
card)
• Provides port speed monitoring, with up to 2 percent over-speed for data rates above 1 Mbps and
5 percent overspeed for data rates below 1 Mbps
The aggregate port speed configurable across all ports is 24.576 Mbps. This speed is the maximum line
speed and the over-subscription ceiling.
The UFM-U front card allows you to specify active ports and to set the maximum speed allowed on each
active port. See the “UFM-U Configuration” section on page 2-54 for more information. Figure 2-24
shows the UFM-U front card faceplate.
Figure 2-24 UFM-U Faceplate
UFM-U
UFM-U
Fail
Active
Minor
H10006
Major