Monitor Option 11C Pri Operation; Maintenance Messages - Nortel Meridian 1 Option 11C Manual

Page 88 of 126 PRI Maintenance

Monitor Option 11C PRI operation

Maintenance messages

553-3011-315 Standard 13.00
Service messages report on near and far end switch status. Both service and
service acknowledge messages are supported on PRI B-channels and ISL
channels. These messages are used for backup D-channel and D-channel
sanity polling. The status may be in-service and out-of-service.
Service and service acknowledge messages for B-channels and ISL channels
are supported between:
• Meridian 1 to Meridian 1: ISL and PRI
• Meridian 1 to CO: PRI only
The status of these messages is reported by the service and service
acknowledge messages for B-channels and ISL channels:
• in-service
• maintenance
• out-of-service
Near end and far end subcategories are defined for each maintenance status.
See Table for possible combinations of near end and far end status, and the
channel capability for each status. When the status of the near end and far end
does not match, the more severe maintenance status takes effect over the less
severe maintenance status.
Table 25
Maintenance message status
Near end status
In-service
In-service
In-service
Maintenance
Out-of-service
January 2002
Far end status
In-service
Maintenance
Out-of-service
N/A
N/A
B channel capability
both incoming and
outgoing calls allowed
only incoming calls
allowed
not allowed to use
not allowed to use
not allowed to use