Nortel Meridian 1 Manual page 67

Procedure 16
ADM troubleshooting procedures (Part 2 of 2)
Symptom
Ring no answer (called DN flashes).
All LED on host SL-1 set flash.
In modem pooling configuration,
ADM call transfers to wrong VFDN.
In modem-pooling configuration,
ADM connect and transfer but there
is no input from called host.
Terminal receives double
characters with loopback option in
the OFF position.
When calling a colocated or
stand-alone ADM, changes must be
made to baud rate or any other
switch position on S3.
Ringback tone stops; no connect
lamp or tone.
Ringback tone ends; continuous
connect tone or a howl is received.
Garbled characters received on
terminal.
Performance testing operations
Procedure
Check all cross-connect jumpers and station cabling for
bridge taps or grounds.
If ADM is accessing a computer port, determine if port
returns DTR.
On QPC314 (QMT7), set SW4 position 2 up.
On QPC399 (QMT8), set S4-2 should be off.
Make sure called ADM is in AUTO-ANSWER.
QPC311 is not properly set, correct options per NTP .
Reset ADM.
Ensure that correct modem is being dialed.
Ensure that VFDN SW (matrix SW) reflects modem's DN
(500 lines).
Position loopback option SW3 position 8 to OFF.
Ensure that correct baud rate.
Ensure that ADM and terminal's switch settings match.
Ensure that host sees correct character for items such
as autobaud CR or space bar.
ADM SW3 position 6 must be in 4W select position.
Check terminal switch settings; they should be in FDX.
Down-line load ADM by operating the DDN key on ADM
from calling ADM.
Operate RESET switch at the called unit.
Operate RESET switch at calling unit.
Call another DDN after RESET; if symptom persists,
remove and replace DLC.
Option E-12-13-14 on ADM must match option
E-37-38-39 or E-52-53-54 of the DLC. See option
settings ADM and DLC.
Meridian data features Operations and tests
Page 67 of 86