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10 Testing and maintenance
In addition to diagnostic tests performed at the M2000 Digital
Telephones, facility maintenance actions are invoked manually through
the following levels on the MAP workstation:
•
•
•
Periodic maintenance actions are invoked on M2000 Digital
Telephones through the Automatic Line Test (ALT) level of the MAP
workstation. For more information on line maintenance, refer to Lines
Maintenance Guide, 297-001-594, and Commands Reference Manual,
297-1001-822.
For a detailed diagnostic program description, refer to the Digital Line
Module (DLM) Reference Manual, 555-4001-101. For a recommended
trouble locating routine, refer to Procedure 6.
Procedure 5 Trouble locating procedures
1
2
3
4
5
6
7
8
555-4001-110 Standard 09.03 July, 2002
Line Test Position (LTP)
Line Test Position Manual (LTPMAN)
Line Test Position Line Test Access (LTPLTA)
If voice communication is normal but data communication fails,
run the MADO Self Test. (Refer to Procedure 4.)
Check for DC output voltage at the power supply/converter
connector pins or replace the power supply/converter plug–in
transformer.
Attempt to make a data call from the terminal keyboard. (Refer
to Chapter 7, "Keyboard dialing".)
Response: If the data call is not successful, proceed with Step
4.
Remove the transformer from the ac receptacle.
Unplug the 5-pin power supply/converter connector at back of
telephone.
Contact service personnel to replace the MADO circuit board
Reconnect the MADO power supply/converter.
Make a new attempt to start a data call.
Response: If trouble persists, continue with the Enhanced
Digital Port Card failure procedure.
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