Error Codes
SM 25 D649
Fax Option
Type C305
(D649)
Code Meaning Suggested Cause/Action
0-76
The calling terminal fell
back to T.30 mode,
because it could not detect
a JM in response to CM
(CM timeout).
 The called terminal could not detect a CM due
to noise, etc.
 Check the line connection and condition.
 Try making a call to another V.8/V.34 fax.
0-77
The called terminal fell
back to T.30 mode,
because it could not detect
a CJ in response to JM
(JM timeout).
 The calling terminal could not detect a JM due
to noise, etc.
 A network that has narrow bandwidth cannot
pass JM to the other end.
 Check the line connection and condition.
 Try receiving a call from another V.8/V.34 fax.
0-79
The called terminal
detected CI while waiting
for a V.21 signal.
 Check for line noise or other line problems.
 If this error occurs, the called terminal falls
back to T.30 mode.
0-80
The line was disconnected
due to a timeout in V.34
phase 2 – line probing.
 The guard timer expired while starting these
phases. Serious noise, narrow bandwidth, or
low signal level can cause these errors.
If these errors happen at the transmitting terminal:
 Try making a call at a later time.
 Try using V.17 or a slower modem using
dedicated tx parameters.
 Try increasing the tx level.
 Try adjusting the tx cable equalizer setting.
If these errors happen at the receiving terminal:
 Try adjusting the rx cable equalizer setting.
 Try increasing the tx level.
 Try using V.17 or a slower modem if the same
error is frequent when receiving from multiple
senders.
0-81
The line was disconnected
due to a timeout in V.34
phase 3 – equalizer
training.
0-82
The line was disconnected
due to a timeout in the V.34
phase 4 – control channel
start-up.
0-83
The line was disconnected
due to a timeout in the V.34
control channel restart
sequence.
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