Specifications

B-30 Cisco MGX 8220 Reference, Release 4.1
IMATM Specification
Physical Layer Interface T1
Physical Layer Interface E1
Line rate: 1.544Mbps +/- 50 bps.
IMATM Synchronization: Digital PLL to synchronize all transmitters to one of the
following: the T3 line, any of the T1 lines, or the MGX 8220
shelf 8KHz clock.
Line Code: Bipolar 8 zero substitution (B8ZS) as specified in
ANSI T1.408.
Line Framing: Extended Superframe Format (ESF 24 frame multifrm) as in
ANSI T1.408.
Input Jitter Tolerance: Per ATT TR 62411.
Output Jitter Generation: Using normal mode synchronization per ATT TR 62411.
Physical Layer Alarms: LOS, OOF, AIS, RDI.
Physical Layer Performance
Parms:
LCV, LES, LSES, CV, ES, SES, SEFS, AISS, UAS.
Line rate: 2.048Mbps +/- 100 bps.
IMATM Synchronization: Digital PLL to synchronize all transmitters to one of the
following: the E3 line, any of the E1 lines, or the MGX 8220
shelf 8KHz clock.
Line Code: HDB3 (E1).
Line Framing: 16 frame Multiframe as in G.704.
ESF Maintenance Functions: None.
Input Jitter Tolerance: As specified in ITU G.823 for 2.048 Mbits/s.
Output Jitter Generation: As specified in ITU G.823 for 2.048 Mbits/s.
Physical Layer Alarms: LOS, OOF, AIS, RDI.
Physical Layer Performance
Parms:
LCV, LES, LSES, CV, ES, SES, SEFS, AISS, UAS.