| 
 Values  | 
 Hang-up cause description  | 
| 
 00 - 0F  | 
 Call placement and termination  | 
| 
 00 
01 
02 
03 
04 
05  | 
 Normal and proper end of connection 
Ring detect without successful handshake 
Call aborted, from +FKS or < CAN>  
No Loop Current 
Ringback detected, no answer (timeout) 
Ringback detected, answer without CED  | 
| 
 10 - 1F  | 
 Transmit Phase A and miscellaneous errors  | 
| 
 10 
11  | 
 Unspecified Phase A error 
No answer (T.30 T1 timeout)  | 
| 
 20 - 3F  | 
 Transmit Phase B hang-up codes  | 
| 
 20 
21 
22 
23 
24 
25 
26 
27 
28  | 
 Unspecified transmit Phase B error 
Remote cannot receive or send 
COMREC error in Phase B 
COMREC error in transmit Phase B 
RSPREC error 
DCS send three times without response 
DIS/DTC received 3 times; DCS not recognised 
Failure to train at 2400 bit/s or +FMS value 
RSPREC invalid response received  | 
| 
 40 - 4F  | 
 Transmit Phase C hang-up codes  | 
| 
 40 
41 
42 
43 
44 
45 
46 
47  | 
 Unspecified transmit Phase C error 
Unspecified image format error 
Image conversion error 
DTE to DCE data underflow 
Unrecognised transparent data command 
Image error, line length wrong 
Image error, page length wrong 
Image error, wrong compression code  | 
| 
 50 - 6F  | 
 Transmit Phase D hang-up code  | 
| 
 50 
51 
52 
53 
54 
55 
56 
57 
58  | 
 Unspecified transmit Phase D error 
RSPREC error 
No response to MPS repeated 3 times 
Invalid response to MPS 
No response to EOP repeated 3 times 
Invalid response to EOP 
No response to EOM repeated 3 times 
Invalid response to EOM 
Unable to continue after PIN or PIP  | 
| 
 70 - 8F  | 
 Receive Phase B hang-up codes  | 
| 
 70 
71 
72 
73 
74  | 
 Unspecified receive Phase B error 
RSPREC error 
COMREC error 
T.30 T2 timeout, expected page not received 
T.30 T1 timeout after EOM received  | 
| 
 90 - 9F  | 
 Receive Phase C hang-up codes  | 
| 
 90 
91 
92 
93  | 
 Unspecified receive Phase C error 
Missing EOL after 5 seconds 
Bad CRC or frame (ECM mode) 
DCE to DTE buffer overflow  | 
| 
 A0 - BF  | 
 Receive Phase D hang-up codes  | 
| 
 A0 
A1 
A2 
A3  | 
 Unspecified receive Phase D error 
RSPREC invalid response received 
COMREC invalid response received 
Unable to continue after PIN or PIP  | 
| 
 C0 - DF  | 
 - reserved for future standardisation  | 
| 
 E0 - FF  | 
 - reserved for manufacturer specific use  | 
| 
 00 - 09  | 
 Call placement and termination  | 
| 
 00 
01 
02 
03  | 
 Normal and proper end of connection 
Ring detect without successful handshake 
Call aborted, from +FKS or AN 
No Loop Current  | 
| 
 10 - 19  | 
 Transmit Phase A and miscellaneous errors  | 
| 
 10 
11  | 
 Unspecified Phase A error 
No answer (T.30 T1 timeout)  | 
| 
 20 - 39  | 
 Transmit Phase B hang-up codes  | 
| 
 20 
21 
22 
23 
24 
25 
26 
27 
28  | 
 Unspecified transmit Phase B error 
Remote cannot receive or send 
COMREC error in transmit Phase B 
COMREC invalid command received 
RSPREC error 
DCS send three times without response 
DIS/DTC received 3 times; DCS not recognised 
Failure to train at 2400 bit/s or +FMINSP value 
RSPREC invalid response received  | 
| 
 40 - 49  | 
 Transmit Phase C hang-up codes  | 
| 
 40 
41  | 
 Unspecified transmit Phase C error 
DTE to DCE data underflow  | 
| 
 50 - 69  | 
 Transmit Phase D hang-up code  | 
| 
 50 
51 
52 
53 
54 
55 
56 
57 
58  | 
 Unspecified transmit Phase D error 
RSPREC error 
No response to MPS repeated 3 times 
Invalid response to MPS 
No response to EOP repeated 3 times 
Invalid response to EOP 
No response to EOM repeated 3 times 
Invalid response to EOM 
Unable to continue after PIN or PIP  | 
| 
 70 - 89  | 
 Receive Phase B hang-up codes  | 
| 
 70 
71 
72 
73 
74  | 
 Unspecified receive Phase B error 
RSPREC error 
COMREC error 
T.30 T2 timeout, expected page not received 
T.30 T1 timeout after EOM received  | 
| 
 90 - 99  | 
 Receive Phase C hang-up codes  | 
| 
 90 
91 
92 
93 
94  | 
 Unspecified receive Phase C error 
Missing EOL after 5 seconds 
Unused code 
DCE to DTE buffer overflow 
Bad CRC or frame (ECM to BFT modes)  | 
| 
 100 - 119  | 
 Receive Phase D hang-up codes  | 
| 
 100 
101 
102 
103  | 
 Unspecified receive Phase D error 
RSPREC invalid response received 
COMREC invalid response received 
Unable to continue after PIN or PIP  | 
| 
 120 - 255  | 
 Reserved codes  |