2009/2/25 stoffell <[email protected]> > Hi all, > > I wanted to switch from my current setup (mISDN) to the native dahdi with > b410p support (wcb4xp). All works fine for normal phone calls but not for > faxing. Faxes are distorted, if arriving at all, and hylafax logs the usual > bad stuff (HDLC frame not byte-oriented.)
What about outgoing faxes ? > > > Our setup uses a digium b410p card with asterisk 1.6, latest libpri and > dahdi, hylafax with iaxmodem, and all this on 1 machine. > > chan_dahdi.conf contains: > faxdetect=both > > When receiving a fax call, hylafax (iaxmodem) answers the call after the > obligatory wait of 3 seconds (fax detection) but to me it seems that echo > cancellation is still being done. Theory is that any echo canceller hearing a 2100Hz fax signal would halt itself, so I wouldn't search in that direction first. Have you tried native 1.6 sendFax, receiveFax ? Maybe it would improve fax performance. > > > Any pointers on this or workarounds? We're back to our old misdn setup for > now ;) > > Here's some output from "dahdi show channel 1" (the one that had the fax > connection going), i cut out some non-related stuff : > *CLI> dahdi show channel 4 > Signalling Type: ISDN BRI Point to Point > Owner: DAHDI/4-1 > Real: DAHDI/4-1 > Callwait: <None> > Threeway: <None> > Confno: -1 > DSP: yes > Busy Detection: no > TDD: no > Relax DTMF: no > Dialing/CallwaitCAS: 0/0 > Default law: alaw > Fax Handled: yes > Pulse phone: no > DND: no > Echo Cancellation: > 128 taps > (unless TDM bridged) currently ON > PRI Flags: Call > PRI Logical Span: Implicit > Actual Confinfo: Num/0, Mode/0x0000 > Actual Confmute: No > > > > Regards, > stoffell > > > > > > _______________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users >
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