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B-13
Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Appendix B Specifications
FRSM-4E1 Specification
FRSM-4E1 Specification
Service Interface
Maintenance/Serviceability
Features:
Internal problem isolation loopbacks hot-pluggable
• Reliability: > 65000 hours MTBF
• Card Size: FRSM-4T1: 7.25 in. x 16.25in.
LM-DB15-4T1: 7.0 in. x 4.5 in.
Power: –48V DC, 30W (4 T1s)
Line Interface connector: DB-15 when used with LM-DB15-4E1 line module
BNC when used with LM-BNC-4E1 line module
Line Rate: 2.048 Mbps ± 100 bps
Synchronization: Transmitter can be either loop-timed to receiver or synchronized
to shelf (called normal mode)
Input Jitter Tolerance: Per G.703
Output Jitter Generation: Per G.703
Physical Layer Alarms: LOS, OOF, AIS, RAI
Number of Frame Interfaces: I to 31 occupying n where 1 < n < 31. Sum of all < 31 for CCS.
1–30 for CAS
Frame Relay Interface Rates: Either 56 kbps or n* 64 kbps; n as defined previously
Frame Relay Interface: Per ANSI T1.618, 2-octet header
Frame Relay Performance
Counters (per port; n x DS0):
Receive frames discarded due to aborts
Receive frames discarded due to illegal header (EA bit)(S)
Receive frames discarded due to CRC errors (S)
Receive frames discarded due to alignment errors (S)
Receive frames discarded due to unknown DLCI (S)
Receive frames discarded due to illegal frame length (S)
Receive frames discarded due to DE threshold exceeded
Receive frames with DE already set
Receive frames with FECN already set
Receive frames with BECN already set
Receive frames tagged FECN
Receive frames (S)
Receive bytes (S)