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Communication Manager Maintenance-Object Repair Procedures
1490 Maintenance Procedures for Avaya Communication Manager 3.0, Media Gateways and Servers
MAINT (PN’s Maintenance Circuit Pack)
S8700 MC
The PN’s TN775D Maintenance circuit pack monitors and supports environmental maintenance
for PN multicarrier or single-carrier cabinets. The PN’s Maintenance circuit pack provides switch
software with a mechanism to activate or deactivate Emergency Transfer in the PN. Control by
the system of Emergency Transfer can be overridden by the Emergency Transfer switch on the
faceplate of the circuit pack. The PN’s Maintenance circuit pack invokes Emergency Transfer
when the PN loses contact with the media server or when the PN’s Maintenance circuit pack
loses contact with every Expansion Interface circuit pack. The PN’s Maintenance circuit pack
handles loss of AC power in the PN multicarrier cabinet by supplying battery power for 15
seconds to the PN cabinet and then an additional 10 minutes of power to just the control carrier
in the PN. When power fails in a single-carrier PN cabinet, no such power holdover is available.
In the event that an Expansion Interface circuit pack goes insane and is reset six times within 15
minutes, the PN’s Maintenance circuit pack will hold the Expansion Links reset preventing the
Expansion Interface circuit pack from running.
The PN’s Maintenance circuit pack has alarm LEDs which indicate the presence of Major,
Minor, and Warning alarms. A flashing LED indicates the presence of an alarm within the
cabinet. A continuously lit LED indicates the presence of an alarm elsewhere in the system.
See CAB-MTCE (Media Gateway Maintenance)
on page 744 for an explanation of emergency
transfer operation in a G650 Media Gateway port network.
Customer-provided alarming device (CPAD)
The system provides customers a way to connect their own alarm indication device to a switch.
The CUST-ALM MO represents this customer-provided alarming device (CPAD).
The customer administers the level of alarm for which the CPAD will be activated using the
change system-parameter maintenance screen (CPE Alarm Activation Level field). The
customer sets this field to: none, warning, minor, or major depending on the level of alarm at
which the CPAD should be activated. When an alarm occurs of at least the level to which the
CPAD is administered, the CPAD in the PN will be activated. The CPAD will also be activated
within a cabinet whenever Emergency Transfer is invoked within that cabinet.
The CPAD is connected to the PN’s Maintenance circuit pack. The CUST-ALM MO is not
maintained by the system, and will not generate any alarms. If a problem is suspected with the
CPAD, it may be tested using test customer-alarm, which will activate the device by
MO Name in
Alarm Log
Alarm
Level
Initial SAT Command to Run Full Name of MO
MAINT MIN test maintenance sh PN’s Maintenance circuit pack
MAINT MAJ test maintenance l PN’s Maintenance circuit pack