MT2834ZDXV - can't connect in data mode

Mirek Kwasniak (mirek@zind.ikem.pwr.wroc.pl)
Thu, 22 Oct 1998 13:24:30 +0200


Hi,

On Wed, Oct 21, 1998 at 01:09:08PM +0200, Gert Doering wrote:
[...]
> >From the report, it is not fully clear *when* the modem actually hangs up
> - while playing the greeting message, or when "recording" afterwards?

I analysed bit more and found that client (Zoltrix) hangs up not server
(ZDXv) while server playing the greeting message.

> 
> One thing that is clear from the report is that the calling modem doesn't
> send the "beep tone" (CNG) that is *required* to identify the caller as
> "modem/fax" (and not "human caller").  So your modem plays the welcome
> message in full length, and then tries to record an incoming message.  If
> there is no message (silence), it will try data/fax.

No, client send something (I hear disturbances in message) but I think it
does to early for my ZDX. I tried playing with S07 register but without
success. I solved it by adding ',,@' after phone number.
It works!

[...]
> > 10/16 08:04:48 yS0    vgetty: queued event DIAL_TONE at position 0009
> > 10/16 08:04:48 yS0    vgetty: unqueued event DIAL_TONE at position 0009
> > 10/16 08:04:48 yS0    vgetty: voice_handle_event got event DIAL_TONE with data <_>
> 
> And here you have the problem: the multitech modem reports "dial tone",
> not "data calling tone".  So most likely the other end has long hung up,
> and your modem is talking to the telephone switch...

Yes, modem is talking to the telephone switch but it is my second problem.
Modem reports "dial tone" but it is in reality "busy tone" (or similiar).
My telephone switch serves me that tone when other side disconnects.

I can ignore this problem in fax/data mode negotiations but it causes
another problem for me while modem is recording voice message because it
can't detect any silence - it isn't :( - or disconnection (my telephone
switch is playing over 30 seconds). I have many voice messages with only
"beep beep" signal.

> Voice and Fax is something that works astonishingly well, voice and data
> is a general problem - basically the answer to your question is "don't do
> it if it doesn't work".

:( It should work (for me).

Thanks,

Mirek