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B-17
Cisco MGX 8220 Installation and Configuration
Release 5.0, Part Number 78-6430-03 Rev. D0, November 2003
Appendix B Specifications
FRSM-8T1 Specification
FRSM-8T1 Specification
Service Interface
Line Interface connector: RJ-48 when used with LM-RJ-48-8T1 line module
Line Rate: 1.544 Mbps ± 50 bps
Line Framing: ESF per ATT TR 54016
Synchronization: Transmitter can be either loop-timed to receiver or
synchronized to shelf (called normal mode)
Input Jitter Tolerance: Per ATT TR 62411
Output Jitter Generation: Per ATT TR 62411 using normal mode synchronization
Physical Layer Alarms: LOS, OOF, AIS, RAI
Number of Frame Relay Ports: 1–Single Frame Relay stream occupying n consecutive time
slots
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)
Transmit frames discarded due to underrun
Transmit frames discarded due to abort
Transmit frames discarded due to egress Q-depth exceeded (S)
Transmit bytes discarded due to egress Q-depth exceeded (S)
Transmit frames discarded due to egress DE threshold
exceeded transmit frames (S)
Transmit bytes (S)
Transmit frames with FECN set (S)
Transmit frames with BECN set (S)