                   Class 1 or 2 Fax Error Codes

CODE CLASS   Description

0-9            Call Placement & Termination
1    1       Ring detect without connection
2    1/2     User aborted
3    2       No loop current
4    1/2     Phone line Busy
5    2       No Dialtone, modem error, no modem response
8    1       Modem error while setting up a call

10-19          Transmit Phase A and Misc.
10   1       Polling request rec'vd (not supported)
11   1/2     Remote did not answer the  call

20-39          Transmit Phase B
20   1/2     Modem error sending DCS or TCF
21   1/2     Unable to support send/rec'v paramters
22   2       COMREC error
23   1       Remote issued DCN
24   2       COMREC invalid
25   1/2     RSPREC invalid
26   2       DCS rec'vd, not recognised
27   1/2     FTT rec'vd at all data rated
28   1       Protocol error after sneding TCF
29   2       RSPREC invalid

40-49          Transmit Phase C Hangup
40   1/2     User aborted tranmission
43   2       Data underflow. Processor may be overloaded

50-69          Transmit Phase D hangup
50   1/2     Modem error after transfer or while sending MPS,EOP,DCN
51   2       RSPREC error
52   1/2     Frame error while sending MPS
53   1/2     Protocol error sending MPS, unknown response
54   1/2     Frame error sending EOP
55   1/2     Protocol error sending EOP
56   2       No response to EOM
57   2       Invalid response to EOM
58   2       Protocol error

70-89          Rec'v Phase B Hangup
70   1/2     Modem error setting data rate
71   2       RSPREC error
72   2       COMREC error
73   2       Timed out, page not rec'vd
74   2       Timed out after EOM rec'vd

90-99          Rec'v Phase C Hangup
90   1       Unable to write data to disk




100-119        Rec'v Phase D Hangup
100  1/2     Protocol error rec'ving MPS,EOM,EOP,DCN,PRI-Q
101  2       RSPREC invalid
102  2       COMREC invalid
103  2       Protocol error

(120-265 reserved codes)  Empty numbers above are also reserved for  future
use.
__________________________________________________________________________
DCS          Digital Command Signal          TCF    Training Check
COMREC       Command Rec'vd                  DCN    Disconnect
RSPREC       Response Rec'vd                 FTT    Failure To Train
MPS          Muliti Page                     EOP    End Of Procedure (page)
EOM          End Of Message                  PRI-Q  Procedure interrupt
__________________________________________________________________________
Phase A      Call Establishment
               check init string
Phase B      Negotiation of data rate and capabilities
               Check init
               check for proper Class
Phase C      Message (page) transmission
               add timing commands
Phase D      After transmission confirmation, possibly more pages
               check init
Phase E      Hangup
                                              Don Hinds - Senior Zoom Tech
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