Nortel DMS 100 Series Maintenance Manual page 143

Alarm display
CM
.
Indication
At the MTC level of the MAP display, a 1RCO2 under the peripheral module
(PM) subsystem header indicates an remote switching center multi-access
(RSC-M) minor alarm.
Note: In this section RSC-M/RCO2 is known as RCO2. When software
outputs messages to the MAP terminal, the software does not recognize the
difference between the two types of RCO2.
Meaning
The indicated number of RCO2 units are in the in-service trouble (ISTb) state.
Impact
This condition does not affect subscriber service.
Common procedures
There are no common procedures.
Action
This procedure contains a summary flowchart and a list of steps. Use the
flowchart to review the procedure. Follow the steps to perform the procedure.
DMS-100 Family Remote Switching Center Multi-Access Maintenance Manual XPM11 and up
MS IOD Net
. . .
RSC-M alarm clearing procedures 5-33
PM CCS Lns
1RCO2 . .
PM RSC-M/RCO2
minor
Trks Ext EIO
. . .