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M/T-BD (Maintenance/Test Circuit Pack)
Issue 1 June 2005 1705
M/T-BD (Maintenance/Test Circuit Pack)
S8700 | 8710 / S8500
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 loop-back 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.
See XXX-BD (Common Port Circuit Pack/Media Module)
on page 2539 for circuit pack-level
errors. See also, related maintenance/test information for analog, digital, and packet-bus ports:
● M/T-ANA (Maintenance/Test analog port)
● M/T-DIG (Maintenance/Test digital port)
● 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.
MO Name in
Alarm Log
Alarm
Level
Initial SAT Command to Run Full Name of MO
M/T-BD MIN test board location l Maintenance/Test circuit pack
M/T-BD WRN release board location Maintenance/Test circuit pack