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Cisco VISM Installation and Configuration Guide
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
APPENDIX
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VISM and VISM-PR—3.0 Specifications

VISM Card Specifications

•ATM layer: Per ITU standards I.361 and ATM UNI v3.1
•AAL layer: AAL5 as per standard I.363.

VISM Card Physical Interface Specifications and Applicable

Standards

Physical Layer Interface T1:
•Line Rate: 1.544 Mbps +/– 50 bps.
•Line Interface Connector: Balanced 100-ohm RJ-48C.
•Synchronization: The transmit clock can be selected from either the looped clock or the node’s
clock.
•Line Code: Bipolar 8 zero substitution (B8ZS) per ANSI T1 .408 a nd A MI.
•Line Framing: Extended Superframe Format (ESF 24-frame multiframe ) per ANSI T1.408 .
•Input Jitter Tolerance: Per ATT TR 62411.
•Output Jitter Generation: Per ATT TR 62411 using normal mode synchronization.
•Physical Layer Alarms: LOS, LOF, AIS, RAI.
Physical Layer Interface E1:
•Line Rate: 2.048 Mbps +/- 50 bps.
•Line Interface Connector: Balanced 120-ohm RJ-48C, Unbalanced 75-ohm SMB.
•Synchronization: The transmit clock can be selected from either the looped clock or the node’s
clock.
•Line Code: HDB3 (E1) and AMI.
•Line Framing: 16-frame multiframe per G.704.
•Input Jitter Tolerance: As specified in ITU G.823 for 2.048 Mbps.
•Output Jitter Generation: As specified in ITU G.823 for 2.048 Mbps.
•Physical Layer Alarms: LOS, LOF, AIS, RAI.