<br><br><div class="gmail_quote">2009/2/27 Matthew Fredrickson <span dir="ltr"><<a href="mailto:creslin@digium.com">creslin@digium.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
I have a couple of suggestions:<br>
<snip><br>
<br>
Olivier wrote:<br>
><br>
><br>
> 2009/2/25 stoffell <<a href="mailto:stoffell@gmail.com">stoffell@gmail.com</a> <mailto:<a href="mailto:stoffell@gmail.com">stoffell@gmail.com</a>>><br>
><br>
> Hi all,<br>
><br>
> I wanted to switch from my current setup (mISDN) to the native dahdi<br>
> with b410p support (wcb4xp). All works fine for normal phone calls<br>
> but not for faxing. Faxes are distorted, if arriving at all, and<br>
> hylafax logs the usual bad stuff (HDLC frame not byte-oriented.)<br>
><br>
><br>
> What about outgoing faxes ?<br>
><br>
><br>
><br>
> Our setup uses a digium b410p card with asterisk 1.6, latest libpri<br>
> and dahdi, hylafax with iaxmodem, and all this on 1 machine.<br>
><br>
> chan_dahdi.conf contains:<br>
> faxdetect=both<br>
><br>
> When receiving a fax call, hylafax (iaxmodem) answers the call after<br>
> the obligatory wait of 3 seconds (fax detection) but to me it seems<br>
> that echo cancellation is still being done.<br>
><br>
><br>
> Theory is that any echo canceller hearing a 2100Hz fax signal would halt<br>
> itself, so I wouldn't search in that direction first.<br>
><br>
> Have you tried native 1.6 sendFax, receiveFax ?<br>
> Maybe it would improve fax performance.<br>
><br>
><br>
><br>
> Any pointers on this or workarounds? We're back to our old misdn<br>
> setup for now ;)<br>
><br>
> Here's some output from "dahdi show channel 1" (the one that had the<br>
> fax connection going), i cut out some non-related stuff :<br>
> *CLI> dahdi show channel 4<br>
> Signalling Type: ISDN BRI Point to Point<br>
> Owner: DAHDI/4-1<br>
> Real: DAHDI/4-1<br>
> Callwait: <None><br>
> Threeway: <None><br>
> Confno: -1<br>
> DSP: yes<br>
> Busy Detection: no<br>
> TDD: no<br>
> Relax DTMF: no<br>
> Dialing/CallwaitCAS: 0/0<br>
> Default law: alaw<br>
> Fax Handled: yes<br>
> Pulse phone: no<br>
> DND: no<br>
> Echo Cancellation:<br>
> 128 taps<br>
> (unless TDM bridged) currently ON<br>
> PRI Flags: Call<br>
> PRI Logical Span: Implicit<br>
> Actual Confinfo: Num/0, Mode/0x0000<br>
> Actual Confmute: No<br>
><br>
><br>
><br>
> Regards,<br>
> stoffell<br>
><br>
></blockquote><div><br>For curiosity, could improve Fax reception with wcb4xxp driver ?<br>Which asterisk version did you precisely pick ? You mentioned 1.6.<br></div></div><br>