Lucent Technologies AT&T 7400B - Manual (Page 43)

DEFINITY Communications System CHAPTER 5: TROUBLESHOOTING
7400B Data Module
User’s Guide Page 5-3
Symptom Problem Solution
Call disconnects The speed of the far end
immediately after an device is higher than the
attempt to connect; NO speed of the local terminal
CARRIER may be device.
displayed on the local
terminal device; CHECK
SPEED LED lights.
The far end device is set
up for half-duplex or
synchronous operation.
Change the speed of the local
terminal device to match that of the
far end device. If the speed of the
far end device is not known, set the
local terminal device to the highest
speed available.
The 7400B Data Module cannot
communicate with a far end device
that is operating half-duplex or
synchronous. This problem can be
resolved only if the far end device
can be reconfigured for full-
duplex, asynchronous operation.
Call disconnects The far end device is busy Try the call again.
immediately after an with another call.
attempt to connect; BUSY
may be displayed on the
local terminal device;
CHECK SPEED LED
does not light.
The telephone number Check the number of the far end
was dialed incorrectly. device that you wish to call and try
the call again.
The far end device is not This situation can only be resolved
busy, but the PBX has by having the PBX readministered
restricted access to the to remove the access restriction.
called device.