I've been trying to get to the bottom of a problem when using my Pace
Solo to send faxes to certain Samsung fax machines. The problem I get
is that the first page of the fax is received ok at the other end but my
Pace Solo then fails to send the second page or even to confirm the
first page has been sent ok. This results in PhoneTools attempting to
resend the first page unless I manually stop it. Receiving faxes works
fine, even from these same machines with multipage faxes. The machine at
the other end which exhibits this problem 100% repeatably is a Samsung
SF-340. I've spoken with Samsung and tried it both with and without ECM
working on the fax machine with no difference.

I've captured the buffer/modem exchange from Phonetools and the problem
area seems to be shown in the T4 elapsed part of this example:

23:54:22,44 <-- CONNECT
23:54:22,44 --> DCS :
23:54:22,44 00 44 14
23:54:23,53 <-- OK
23:54:23,53 --> AT+FTS=8
23:54:23,66 <-- OK
23:54:23,66 --> AT+FTM=145
23:54:23,70 <-- CONNECT
23:54:23,71 --> TCF 14400
23:54:26,83 <-- OK
23:54:26,83 --> AT+FRH=3
23:54:27,02 <-- CONNECT
23:54:28,19 <-- CFR
23:54:28,20 <-- OK
23:54:28,35 --> AT+FTM=146
23:54:28,47 <-- CONNECT
23:54:28,48 --> Facsimile message...
23:54:49,45 <-- OK
23:54:49,45 --> AT+FTS=8
23:54:49,58 <-- OK
23:54:49,58 --> AT+FTH=3
23:54:50,49 <-- CONNECT
23:54:51,33 --> EOP
23:54:51,68 <-- OK
23:54:51,68 --> AT+FRH=3
23:54:55,05 T4 elapsed
23:54:55,11 DLE.03h
23:54:55,12 <-- OK
23:54:56,21 --> AT+FTH=3
23:54:57,12 <-- CONNECT
23:54:57,92 --> EOP
23:54:58,28 <-- OK
23:54:58,29 --> AT+FRH=3
23:54:58,49 <-- CONNECT
23:54:59,60 <-- RTN
23:54:59,60 <-- OK
23:54:59,61 --> AT+FTH=3
23:55:00,57 <-- CONNECT
23:55:01,38 --> TSI :

I'm not sure whats going on here and BVRP has been little help other
than to say it's a compatibility issue between my hardware and the fax
machine. As the Solo always seems to send any faxes fine at 9,600 bps (I
suspect this would even be successful to the SF-340), I asked them if
there was a way of controlling PhoneTools maximum send speed but there
appears not to be and only the receive speed can be restricted.

Has anyone experienced such compatibility problems and how was it
solved? I've tried using Windows XPs built in fax services and this
results in a "fatal error" when sending to the SF-340 (but it's fine to
other fax machines) so as I suspected it's not a software bug causing
the problem.

My ideal solution would be if there's a way to make PhoneTools use the
modems Class 2 fax capability or to somehow limit the modem to 9,600 fax
transmission speed (perhaps with an AT command to reset the default fax
profile). I dont mind if all faxes go out at 9600 as the SF-340 is the
one I most often fax to.

Is there any way to get to the bottom of this further, perhaps using the
modems own reporting capability?