Functional description
154 MPR-e and MSS-1c User Manual 3DB19901EFAA Edition 01
Figure 3.64 — Auto TX mute in XPIC configuration
3.10.8.8 — 1+1 Hot StandBy for MPR-e
When protection is switched in 1+1 HSB configuration, the spare ODU module is
squelched.
3.10.8.8.1 — HSB Switching Criteria
The switching criteria are:
• MPT Access Card Fail status
• IDU-ODU Connection Failure
• ICP alarm
• Incompatible Shifter alarm
• Incompatible Frequency alarm
• Incompatible Power alarm
• Incompatible Modulation Parameters alarm
• Mated MPT Access card Failure
• Inter-MPT coupling link failure. Where there is a cross configuration (EPS on Spare
& TPS on main), HSB (TPS) will switch and align with EPS position, if there is an
inter-MPT coupling link failure.