Installation guide

A-13
Cisco IGX 8400 Series Installation Guide, Release 9.3.3 and Later Releases
OL-1165-06
Appendix A System Specifications
UFM Unchannelized Interface
UFM Unchannelized Interface
This section contains specifications for the V.35/X.21 and HSSI interface cards for the UFM-U.
Frame Relay Interface for the FRM Front Card
This section contains technical specifications for Frame Relay service on the FRM.
V.35 or X.21 HSSI
Line rate: 56 kbps–10.24 Mbps 1.-24–16.384 Mbps
Clock rate: N x 64 KHz, where 1 <= N <= 32
N x 1.024 MHz, where 2 <= N <= 10
1.024 + N x 0.512 MHz
Connector type: DB-60 50-pin SCSI
Interface mode: DTE or DCE DTE or DCE
Type of service: Permanent virtual circuit (PVC)
Data interface: Per ITU-T I.122 and ANSI T1/S1 standards
Data transfer protocol: LAP-D frame level core functions
Input data format: High-Level Data Link Control (HDLC) protocol
Input data frame length: Up to 4096 bytes
Frame integrity check: Frame Check Sequence and CRC check of data frame. If CRC
fails, data frame is discarded at receiving node.
Input data rate: 56 kbps–2.048 Mbps. The maximum rate is available with only
one of four ports on the back card active.
Ports per card: 4 model D
31 model E
PVCs per port: 252 per FRM card, distributed in any combination
Port electrical interface: ITU-T V.35. IGX node and X.21 can be DCE or DTE for direction
of control leads and timing on Model D and E using E1 or T1.
Data clocking: Normal or looped
Virtual circuit identifier: Data Link Connection Identifier (DLCI)
Control protocol: Local management interface with XON/XOFF type flow control.
The IGX node sets FECN and BECN bits in Frame Relay frame.