Re: [hylafax-users] External faxmodem problem - "Error sending T.30 prologue frames"

[Lee Howard <faxguy@xxxxxxxxxxxxxxxx>]

On 2004.05.15 04:14 Orbán Attila wrote:

> My modem is standard external faxmodem, DIALCOM  2814 (28800 bps)
> [V.34,
> V.42bis, MNPS, Class2]

> May 14 19:08:00.73: [ 4804]: <-- [9:AT+FTH=3\r]
> May 14 19:08:00.82: [ 4804]: --> [7:CONNECT]
> May 14 19:08:00.82: [ 4804]: <-- data [23]
> May 14 19:08:00.82: [ 4804]: <-- data [2]
> May 14 19:08:02.71: [ 4804]: --> [2:OK]
> May 14 19:08:03.37: [ 4804]: --> [0:]

The problem here is that the HDLC frame that is being transmitted is 
not a "final frame", and thus HylaFAX was expecting CONNECT instead of 
OK, and that's why HylaFAX ignores the OK and keeps waiting until the 
timeout.  This is not "standard external faxmodem" behavior.

HylaFAX's behavior here is different in 4.2.0.  You may want to try 
4.2.0beta2, it should behave differently after getting the unexpected 
OK.  Now, I'm not certain that it will "fix" the transmission, 
however.  It might, though.

Really this is something that Dialcom needs to fix.  But given that it 
appears to be an older modem, I doubt that you'll get anywhere with 
it.  We can make a workaround in HylaFAX, however.  I'll need to see 
the HylaFAX 4.2.0 behavior, though, to be able to help you there.

Lee.

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