Nortel Meridian 1 Manual page 42

Page 38 of 144 Telephones
Table 8
M2317 trouble-locating procedures (Part 1 of 2)
Action
Step
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 1
Telephones: Description and Specifications (553-3001-108)). 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 1
Telephones: Description and Specifications (553-3001-108)). If still not successful,
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 1). 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.
553-3001-215 Standard 12.00 January 2002
When the M2317 digital telephone or the data option fails to function properly,
follow the steps listed in Table 8 in sequence to isolate the problem area.