Demand test descriptions and error codes - Avaya Support

M/T-BD (Maintenance/Test Circuit Pack)
MO Name
in Log
Alarm
Level
The Maintenance/Test circuit pack (TN771D) supports packet bus fault detection and bus
reconfiguration for the port network where it is installed. The circuit pack also provides Analog
Trunk testing, and data loopback testing of DCP Mode 2 endpoints and Digital (ISDN) Trunk
facilities via the TDM bus.
Port 1 of the Maintenance/Test board is the Analog Test port which provides the Analog Trunk
testing function for Automatic Transmission Measurement System (ATMS). ATMS is a feature in
which calls are made from a device called an Originating Test Line (OTL) over a specific trunk to
a device called a Terminating Test Line (TTL). The OTL and TTL can then send tones over the
trunk under test and determine the quality of the connection. Ports 2 and 3 are the digital ports
which provide the digital (ISDN) trunk-testing functions. Port 4 is the packet port which provides
the packet bus maintenance function. For more information, see Maintenance Procedures for
Avaya Aura Communication Manager, Media Gateways and Servers (03-300432).
See XXX-BD (Common Port Circuit Pack/Media Module) for circuit pack-level errors. See also
related maintenance/test information for analog, digital, and packet bus ports:
● MG-ANA (Analog Media Module)
● M/T-DIG (Maintenance/Test Digital Port)
Initial Command to Run Full Name of MO
M/T-BD MIN test board location long Maintenance/Test circuit pack
WRN release board location
● M/T-PKT (Maintenance/Test Packet Bus Port)
Every port except the analog port (Port 1) of the Maintenance/Test board is automatically
administered when the circuit pack is inserted into the system and automatically removed when
the circuit pack is unplugged from the system. The Analog port however, is administered using
the station screen with the type “105TL” for an OTL or a TTL. This port remains administered
even after the circuit pack is physically removed from the system. Care should be taken to
remove the OTL or the TTL before unplugging the circuit pack.
676 Maintenance Alarms for Communication Manager, Media Gateways and Servers