Phase A is establishing the connection (dialing & sending CNG and pickup)
Phase B is the T.30 handshake (negotiation of resolution, speed etc.)
Phase C is the data (fax image) sending
Phase D is the inter-page or end of message T.30 handshake
 
HangUp Status Codes - Call Placement and termination
 
  0     Normal and proper end of connection - indicates a modem
        dialing error of unknown type which returns the modem to
        normal operation afterwards.  This type of error is not
        counted as a "try" for counting retries
 
  1     Ring Detect without successful handshake (ERR_RINGDETECT)
        This is a fatal error, Siren Fax will not retry a job which
        experiences this error, as normally it is only encountered
        when something other than a fax (or someone) answers the
        call from Siren Fax.  When an incorrect number is dialed,
        this error normally results.  If the DIALWAIT option is not
        enabled in FAXSPROFILE, Error code 1 will also result from
        calls which would otherwise receive an Error code of 10 or
        11 (and be retried)
 
  2     Call aborted, from +FK or  - means the software killed the
        transmission session - rarely or never seen - not counted as a try
 
  3     No loop current - indicates a telephone line error - not
        counted as a try.
 
Transmit Phase A Errors.  Errors commonly occur in Phase A due to
incorrect phone numbers (in the case of Error Code 1) or other
anamolies.  Typically Phase A errors are not retried (normally
set as fatal errors in FAXSPROFILE)
 
 10    Unspecified Phase A error (ERR_UNSPECPHA) - means that
        some undetermined failure occurred in the handshake
        protocol - only seen if DIALWAIT option is enabled in
        FAXSPROFILE - normally this is a fatal error and job will
        not retry
 
 11    No answer (T.30 T1 time-out) (ERR_NOANSWERPHA) - This is
        not the same as the telepphone line failing to answer
        (Error Code 155) this is only seen if the DIALWAIT
        option is enabled in FAXSPROFILE - normally this is a
        fatal error and job will not retry
 
Transmit Phase B Errors
 
Errors in Phase B are relatively uncommon, but very persistent
with certain numbers you might dial.  They occur during the
T.30 initialization protocol phase.  Siren Fax normally retries
after a Phase B error, but some receiving devices cannot be
connected to without special handling by the Siren Fax
Administrator, hence repeated errors may be experienced with
a particular receiver
 
 20    Unspecified Transmit Phase B error
 21    Remote cannot receive or send
 22    COMREC error in Transmit Phase B
 23    COMREC invalid command received
 24    RSPREC error
 25    Siren Fax Responds same as 26 below -
        Specified Response for Error 25 is: DCS sent 3 times
        with response
 26    DIS/DTC received 3 times; DCS not recognized
 27    Failure to train at 2400 bps or +FMINSP value
 28    RSPREC invalid response received
 
Transmit Phase C Errors - Siren Fax will retry the job when
Phase C errors occur, unless on the last retry.
 
 30    Unspecified Transmit Phase C error
 
 33    DTE to DCE data underflow - normally caused by a poor
        quality modem with insufficient buffer, or caused by
        a Serial port which is not properly handling software
        flow control or which cannot properly
        buffer the data flow at normal speeds.
 
 40    Unspecified Transmit Phase C error - same as 30
 
 41    RSPREC error - error
 
 42    No Response to MPS repeated 3 times - MPS means
        Multi-Page Send.'  Prior to sending each page, the
        sending modem `trains' with the receiving fax machine
        or modem, ie. they re-establish the communcations
        parameters to be used for the next page of image data.
        This error means that some part of the retrain process
        failed and that the devices jointly decided to give up.
        Siren Fax will retry the job when this error is detected,
        unless it occurs on the last retry.
 
 43   Invalid response to MPS
 
 44   No response to EOP repeated 3 times - will normally
        retry and send remaining pages
 
 45   Invalid response to EOP
 
 46   No response to EOM repeated 3 times
 
 47   Invalid response to EOM
 
 48   Unable to continue after PIN or PIP
 
Transmit Phase D Errors - Siren Fax will retry the job when
Phase D erros occur, unless on the last retry.
 
 50   Unspecified Receive Phase B error in hangup protocol
 
 51   RSPREC error - same as 41 above
 
 52   COMREC error:  Same as 42, No Response to MPS repeated 3 times
 
 53   T.30 T2 time-out, page expected but not received
 
 54   Siren Fax Responds same as 44 above -  Specified
        Response for Error 54 is: T.30 T1 time-out after EOM received
 
 60   Unspecified Receive Phase C error
 
 61   Missing EOL after 5 seconds (seciont 3.2/T.4)
 
 63   DCE to DTE buffer overflow
 
 64   bad CRC or frame (ECM or BFT modes)
 
 70   Unspecified Receive Phase D error
 
 71   RSPREC invalid response received
 
 72   COMREC invalid response received
 
 73   Unable to continue after PIN or PIP
 
 74   T.30 T1 time-out after EOM received
 
 90   Unspecified Receive Phase C error
 
 91   Missing EOL after 5 seconds - result is that modem
        times out and disconnects - EOL means End Of Line,
        referring to the end of a scan line
 
 93   DCE to DTE buffer overflow
 
 94   bad CRC or frame (ECM or BFT modes)
 
100  Unspecified Receive Phase D error
 
101  RSPREC invalide response received
 
102  COMREC invalide response received
 
103  Unable to continue after PIN or PIP
 
128  Cannot send due to MIN speed parameter (ERR_MINSPEEDERR)
 
129  Cannot send remote is V.29 only (ERR_REMOTEV29)
 
130  No T4 receiver bit in DCS/DIS frame (ERR_NOT4RECVBIT)
 
131  FK or cancel
 
132  Format mismatch (ERR_FORMATMISM)
 
133  Remote can't receive (ERR_CANTRECEIVE)
 
134  XON not received in time to save session
 
151  Dialing Failed - An attempt at dialing a number
        timed out (ERR_DIALFAILED)
 
152  No Dialtone - The modem reported no dial tone (ERR_NODIALTONE)
 
153  Busy - The modem reported line busy (ERR_BUSY)
 
154  Unknown Receive Error - rarely seen. Failed/timeout
        during modem dialog in adm/faxrcv/recv2.c:
        timeout from fax2wait(OK, ...) or waitok() initial
        dialog setting modem speed, volume, etc setting modem
        class on  LEOF, TIMEOUT, FHNG returned by call to
        mdread when mdread didn't set any other error code
        during modem data read/write using sio_write() (ERR_UNKNOWN)
 
155  No Answer - The receiving end did not answer, ie. did not
        go off hook:
        This error is only returned when DIALWAIT is enabled in
        FAXSPROFILE,  if disabled an Error Code 1 is returned
        (ERR_NOANSWER)
 
156  Modem either timed out or failed to return OK during
        an initialization step in adm/libdm/fax2.c (ERR_INITPROB)
 
157  Answer Timeout - Modem timed out during the call to mdread()
        in fax2wait() Modem returned a RING/LEOF at an inappropriate
        time while waiting for an answer (ERR_ANSWERTIM)
 
160  Modem Dial Error - dialing phase timeout error - generated
        by the modem.  Failed/timeout during modem dialog while
        dialing in adm/faxsnd/send2.c: LEOF, TIMEOUT, RING  returned
        by fax2wait(OK) timeout from waitok() (ERRDUNKNOWN)
     
161  Modem Send Error - Sending phase timeout error - generated
        by the modem.  Failed/timeout during modem dialog while
        sending in adm/faxsnd/send2.c:  LEOF, TIMEOUT, RING
        returned by fax2wait(OK,CONNECT) LEOF, TIMEOUT,  FHNG,
        RING returned by mdread()
        -1 returned by sio_get()
        -1 returned by fax2eom()
        timeout in sio_write()
     
162  Modem Finish Error - EOM phase timeout error - generated
        by the modem.  Default error condition from fax2eom()
        after LEOF, TIMEOUT, FHNG, RING  (ERRFUNKNOWN)