Re: [hylafax-users] Unspecified Phase C error

[Lee Howard <faxguy@howardsilvan.com>]

On 2003.06.06 06:34 Y BAESA wrote:

> Jun 05 13:48:33.72: [17177]: RECV: begin page
> Jun 05 13:48:33.72: [17177]: RECV: send trigger 022
> 
> Jun 05 13:48:33.72: [17177]: <-- data [1]
> 
> Jun 05 13:48:34.77: [17177]: RECV: 0 total lines, 0 bad lines, 0
> consecutive bad lines
> 
> Jun 05 13:48:34.77: [17177]: --> [14:+FPS:1,1,0,0,0]
> 
> Jun 05 13:48:37.16: [17177]: --> [5:ERROR]
> 
> Jun 05 13:48:37.16: [17177]: MODEM Command error
> 
> Jun 05 13:48:37.16: [17177]: REMOTE HANGUP: Unspecified Phase C error,
> including too much delay between TCF and +FDR command (code 90)
> 
> Jun 05 13:48:37.16: [17177]: RECV FAX (00005584): recvq/fax04430.tif
> from 0558467722, route to <unspecified>, 0 pages in 0:17
> 
> Jun 05 13:48:37.16: [17177]: RECV FAX: Unspecified Phase C error,
> including too much delay between TCF and +FDR command
> 
> Jun 05 13:48:37.16: [17177]: <-- [7:AT+FKS\r]
> 
> Jun 05 13:48:37.40: [17177]: --> [2:OK]

Prior to the "RECV: begin page" entry you should see an AT+FDR command 
followed by CONNECT.  According to T.32 8.3.4, +FDR should result in 
ERROR when the modem has gone on hook.  In other words, ERROR here is 
quite fatal to fax reception.  Notice that either zero (according to 
HylaFAX) or only one (according to the modem +FPS: response) line was 
received.  Assuming the transmitter did not misbehave and this occurs 
regularly, I'd say that the modem Class 2.0 firmware is flawed and is 
choking on the data - causing it to reset and go on-hook.

> I tested an identical modem (U.S.ROBOTICS 56k FAXMODEM)

USR/3Com's Class 2.0 firmware has long since been severely flawed and 
they seem to not care to fix it - AND there's no way to upgrade it 
easily if they did.  Use Class 1 with USRs.

Lee.

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