Table 6 T-311 Response Messages
Digit
Code
Word
Code
X Commands
Enabled
Description
30
No dial tone
X2,X4,X5
No dial tone found
31
No answer
X5
Ringback count exceeded
32
Lost
—
Encountered unknown event
Line Control Messages
40
Seized
All
Line seized
41
Seize Failure
All
Failed to draw loop current
42
Disconnect
All
Line has been disconnected
43
Disconnect Failure
All
Loop current failed to drop
44
Line not available
All
Line already seized
45
No loop current
All
Loop current dropped unexpectedly
46
Line on hold
All
Line on hold
47
Line 1 selected
All
Line is set to current line
54
Line not available
All
Line already seized
60
—
All
(Reserved for future use)
61
No activity
All
No activity timeout reached
62
Flash
All
Flash line
63
Flash failure
All
Loop current failed to flash
64
Phone off-hook
All
Loop current appeared (series phone off-hook)
65
Phone on-hook
All
Loop current gone
66
Single message format (Caller ID)
Multiple message format (Caller ID)
67
VMS
Visual Message -Single message format
Visual Message - Multiple message format
Reference Manual
Chapter 9: Messages
40-400-00045, Rev.
B
Page 39