PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
• Symmetrical configuration with asymmetrical operation.
• Asymmetrical configuration with asymmetrical operation.
• Performs IMA differential delay calculation and synchronization.
• Provides programmable limit on allowable differential delay and minimum
number of links per group.
• Supports up to 279 ms (for T1 links) and 226 ms (for E1 links) link-differential
delay between links in an IMA group.
• Performs ICP and stuff-cell insertion and removal.
• Supports both Common Transmit Clock (CTC) and Independent Transmit
Clock (ITC) transmit ICP stuffing modes.
• Supports IMA frame length (M) equal to 32, 64, 128, or 256.
• Optionally supports the IMA 1.0 method of reporting Rx cell information as
defined in appendix C.8 of the ATM Forum Inverse Multiplexing for ATM
Specification Version 1.1 for symmetrical configurations with M=128.
• Provides IMA layer statistic counts and alarms for support of IMA
Performance and Failure Alarm Monitoring and MIB support.
• Provides per link counters for statistics and performance monitoring:
• ICP Violations
• OIF anomalies
• Rx Link stuff events
• Tx Link stuff events
• User cells
• Filler cells
• Provides per group counters for statistics and performance monitoring:
• User cells received
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
4
PMC [ PMC-SIERRA, INC ]
