Nortel Meridian 1 Manual page 66

Page 66 of 86 Performance testing operations
Procedure 16
ADM troubleshooting procedures (Part 1 of 2)
Symptom
Dark power indicator (LED).
Dial tone is not returned when DDN
key is operated. Data Shift key LED
lights.
ADM functions per Nortel Networks
Publication; no response on action
device (terminal).
553-2731-300 Standard 4.00 April 2000
— Improper connections made from ADM (or MCDS) to PE.
• Check all physical connections and terminations.
• Conduct continuity tests as required.
— DLC port assigned to the DLC under test is faulty.
• Load LD 32 (Network and PE Replacement Diagnostic) and
test. Replace pack if test fails.
• If the ADM (or MCDS) assigned to the other data port on the
pack is functioning normally, reassign the ADM (or MCDS)
under test to that TN.
— ADM (or MCDS) under test is faulty.
• If loopback tests were unsatisfactory after conducting the
procedures in Steps (a) through (i), follow procedures shown in
Procedure 16 before replacing the ADM (or MCDS) under test.
Procedure
Ensure that power transformer has an AC source.
Ensure that transformer output is properly connected to
ADM.
Ensure that all leads are properly terminated in host
SL-1 set.
Check switch S4-2.
On QPC314 (QMT7), if terminal gives DTR, S4-2 should
be up; otherwise, switch should be down.
On QPC399 (QMT8), if terminal gives DTR, S4-2 should
be off.
Check that the terminal is set on-line.
Ensure that action device is connected to ADM using
RS-232 cable.
Loopback switch is off.
Switch settings match between ADM and terminal.