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Appendix B: Meridian Modular Telephones installation Page 365 of 504
Telephones and Consoles Description, Installation, and Operation
When the M2317 digital telephone or the data option fails to function properly,
follow the steps listed in Table 62 in sequence to isolate the problem area.
Table 62
M2317 trouble-locating procedures (Part 1 of 3)
Step Action
Loop power failure
1 Plug in the telephone.
2 The LCDs flash once to indicate the power is OK.
Data communication failure
1 If voice communication is normal but data communication fails, check for DC output
voltage at the power supply connector pins or replace the power supply plug-in
transformer.
Attempt to make a data call from the terminal keyboard. Refer to “Meridian
Programmable Data Adapter” on page 352. If not successful, proceed with Step 2.
2 Make a call to the DN (voice or data) to verify that the port is enabled.
3 Use an EIA or RS-232 breakout box in conjunction with the terminal cable to verify
lead states and replace or repair cable if pinouts are incorrect.
Attempt to make a data call from the terminal keyboard. Refer to “Meridian
Programmable Data Adapter” on page 352. If unsuccessful, proceed with Step 4.
4 Remove the transformer from the AC receptacle, unplug the 5-pin power supply
connector at the back of the telephone, and replace the data option circuit board. See
Procedure 78 on page 427. Reconnect the data option power supply.
Make a new attempt to start a data call. If trouble persists, continue with the ISDLC
failure procedure.
5 Use the self-test procedure to verify that the telephone electronics are operating
correctly.