Exiting The Opm Esa Mode - Nortel DMS-100 Series Maintenance Manual

The OPM does not gain channels when the system arranges the C-side
channels on OPM ESA entry. The OPM gains interswitch channels when there
is a decrease of intraswitch channels.

Exiting the OPM ESA mode

After communications restore, the DMS CC recovers the OPM from the ESA
mode. When the OPM exits ESA mode, the system performs a cold exit. The
system takes all active calls down.
When the system restores C-side communications between the OPM and the
DMS CC, the DMS CC initiates the ESA exit sequence. Before the ESA exit
sequence begins, the DMS CC communicates with the ESA processor over the
direct connection. This communication determines if the OPM is in ESA
mode and if the system can recover the OPM immediately. The two
possibilities to recover the OPM are a system exit or a manual exit.
ESA system exit
A system exit is an automatic exit from ESA mode that the DMS CC start
without operator interference. The system starts a system exit if any of the
following conditions exist:
• At least one LCM unit of the OPM is SysB or C-side busy (CBsy).
• The RLCM_XPMESAEXIT office parameter time-out value is not zero.
The following is the system exit sequence.
1. The system restores C-side communications between the DMS CC and
the OPM.
2. The DMS CC discovers the OPM is in ESA mode.
3. The DMS CC enters ESA time-out mode.
4. When the DMS CC times out, the DMS CC sends an ESA-exit request to
the ESA processor.
5. The OPM and the ESA processor perform exit operations.
6. The ESA processor tells the LCM to return the LCC to normal operations.
7. The ESA processor sends operational measurements, peg counts, and the
reason the system entered ESA mode to the DMS CC. The system
displays this information in the PM171 log. The system generates the
PM181 log if the ESA exit has problems.
8. The DMS CC RTS the OPM.
9. Return to service the ESA processor and RMM nodes.
DMS-100 Family OPM Maintenance Manual ISN07 (TDM)/SN07 (DMS) and up
ESA maintenance overview 4-21