Specifications

2-51
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
UFM Features
The UFM supports the following features:
• Supports Frame Relay-to-ATM service interworking
• Support for both FR UNI and NNI interfaces on a per-port basis
• Support for ANSI T1.618 using a two-octet header
• Support for ELMI, StrataLMI, Cisco LMI, ANSI T1.617 Annex D, and CCITT Q.933 Annex A
Frame Relay signaling protocols
• Support for mapping, segmenting, and reassembly of FR data streams to and from FastPackets
• Provides congestion notification across NNIs and UNIs through CLLM message generation
• Supports ingress policing, frame forwarding, and explicit congestion notification
• Applies zero-suppression to FastPacket payload space
• Detects and discards corrupted frames during transmission on the node
• Supports CIR=0
• Supports up to 1000 logical channels per card. These logical channels are configurable on a single
physical interface or across multiple physical interfaces.
• Provides a maximum total throughput of 16 Mbps
• Each data stream’s throughput can be configured separately—see the “Making Frame Relay
Connections” section on page 3-36 in the Cisco IGX 8400 Series Installation Guide for more
information
• Supports up to 248 logical ports (UFM-C only)
Note Logical ports must use contiguous time slots. See the “Making Frame Relay Connections”
section on page 3-36 in the Cisco IGX 8400 Series Installation Guide for more information.
• Configurable for 1 to 24 (T1) or 31 (E1) FR data streams
• Supports unchannelized E1, with one logical E1 port mapping to one E1 line
• Supports ITU-T recommendation I.370 through usage parameter control (UPC)
UFM-C Front Cards
The UFM-C front cards can occupy any available front service card slot (slots 3 to 32). The module’s
back card depends on the desired interface type; please see the following usage information:
• For T1 lines, use the UFI-8T1-DB-15.
• For E1 lines, use the UFI-8E1-DB-15 (with DB-15 connectors) or the UFI-8E1-BNC (with BNC
connectors).
The UFM-C front cards support either four (the UFM-4C) or eight (the UFM-8C) T1 or E1 lines per back
card. See Figure 2-23 for a description of a UFM-C front card faceplate. The UFM-C front cards use
standard service card LEDs; see the “Standard Service Module LEDs” section on page 2-14 for more
information on these LEDs. For information on back cards compatible with the UFM-C, see Table 2-33.