Re: [hylafax-users] T.30 T2 timeout, expected signal not received

[Marcin Giedz <marcin.giedz@xxxxxxxx>]

Hi Lee,

You're absolutely right - as always ... It appeared that signal level on 
transmitter side is less then -25dB - where it should be max -2.5... 
-5dB ... now we're talking with telco to figure out what's going on on 
the line.

Thanks,
Marcin

Lee Howard pisze:
> Marcin Giedz wrote:
> > I'm facing some problems with sending facsimiles from Hylafax+ 
> > version 5.2.7 using IAX modems + Sangom CARD + Asterisk. Connection 
> > is established but during "send phase" something goes wrong. Here is 
> > the log from last session:
> >
> > lis 26 13:41:32.34: [ 4853]: SESSION BEGIN 000017120 XXXX
> > lis 26 13:41:32.34: [ 4853]: HylaFAX (tm) Version 4.4.4
> >
> > lis 26 13:41:56.11: [ 4853]: RECV received frame number 33
> > lis 26 13:41:56.11: [ 4853]: RECV assumed RCP frame with block end
> > lis 26 13:41:56.11: [ 4853]: --> HDLC<5:FF C0 61 96 D3>
> > lis 26 13:41:56.11: [ 4853]: MODEM input buffering disabled
> > lis 26 13:41:56.11: [ 4853]: --> [10:NO CARRIER]
> > lis 26 13:41:56.11: [ 4853]: <-- [9:AT+FRH=3\r]
> > lis 26 13:41:56.42: [ 4853]: --> [7:CONNECT]
> > lis 26 13:42:02.72: [ 4853]: --> [2:10 03]
> > lis 26 13:42:02.72: [ 4853]: --> [10:NO CARRIER]
> > lis 26 13:42:02.72: [ 4853]: MODEM No carrier
> > lis 26 13:42:02.72: [ 4853]: <-- [9:AT+FRH=3\r]
> > lis 26 13:42:02.91: [ 4853]: --> [7:CONNECT]
> > lis 26 13:42:12.91: [ 4853]: MODEM TIMEOUT: receiving HDLC frame data
> > lis 26 13:42:12.91: [ 4853]: <-- data [1]
> > lis 26 13:42:12.92: [ 4853]: --> [2:]
> > lis 26 13:42:12.92: [ 4853]: --> [2:OK] 
>
> Just to be clear - on the receive-side you're using HylaFAX 4.4.4 and 
> a hardware modem on ttyS7.
>
> What happens is that the received audio is broken in the middle of 
> Phase C.  Thus the "assumed RCP frame with block end".  This will 
> happen, for example, with jitter.  The receiving modem then goes to 
> listen for the partial-page message (+FRH=3 - V.21 HDLC), the 
> receiving modem erroneously reports CONNECT (twice) on V.17 audio, and 
> then the receive-side gives up.
>
> So there was a glitch in the audio and then a small modem bug on the 
> receiver mixed with a less-tolerant HylaFAX operation on the receiver 
> caused the failure.
>
> Start analyzing the audio path to figure out why it's being 
> disturbed.  Even if the receiver didn't have a problem in recovering 
> from this you'd still want the audio problem to be fixed.
>
> Thanks,
>
> Lee.

--
Pozdrawiam
Marcin Giedz
Wiceprezes Zarządu

ARISE M.Giedz, T.Żebruń Sp.j.
mob. +48 502 537 157
mail: marcin.giedz@xxxxxxxx

ul. Waliców 11
00-851 Warszawa
tel./fax +48 (22) 583 93 40
http: www.arise.pl

ARISE M.Giedz, T.Żebruń Sp.j. z siedzibą w Świerże, ul. Jana Pawła II 44, 22-175 Dorohusk, zarejestrowana przez Sąd Rejonowy - Sąd Gospodarczy w Lublinie, XI Wydział Gospodarczy Krajowego Rejestru Sądowego, pod nr KRS 0000267203; REGON 060191418; NIP 563-230-12-18; z pokrytym w całości kapitałem zakładowym wynoszącym 24,000.00 zł.





____________________ HylaFAX(tm) Users Mailing List _______________________
 To subscribe/unsubscribe, click http://lists.hylafax.org/cgi-bin/lsg2.cgi
On UNIX: mail -s unsubscribe hylafax-users-request@xxxxxxxxxxx < /dev/null
 *To learn about commercial HylaFAX(tm) support, mail sales@xxxxxxxxx*