[Asterisk-Users] Problems with fax failing when bridged across TDM400Pvers E

Mon Nov 21 21:45:29 MST 2005

In my case, we only get a small number of faxes, so I outsourced it to
a company with an 800 number. Faxes are received in pdf form via email
which is much better for us anyway. The few times I need to send a fax,
I simply unplug one of four pstn lines and use it with the fax.

Would be nice if the TDM could handle modem calls. 

------------------------

> Hi,
> 
> Okay I tried what you suggested and bummer I get 99.987793%. So how do 
> you handle faxes.. We want to use a fax machine and make the line 
> available for voice when the fax is not used which is not much. We use a 
> trunk dial setup for this which works great. I am all ears there must be 
> a way to fix this??
> 
> Thanks
> 
> Rich Adamson wrote:
> 
> >Try running /usr/src/zaptel/zttest -v and see what you get for results.
> >If you get something like this:
> > Opened pseudo zap interface, measuring accuracy...
> > 8192 samples in 8191 sample intervals 99.987793% 
> > 8192 samples in 8191 sample intervals 99.987793% 
> >where the intervals are less then 100%, then the problem is the same
> >issue we've all been fighting for some time. The less then 100% is
> >indicative of 'missed frames' of data from the TDM card to the zaptel
> >drivers (eg, pci bus).
> >
> >Fax modem transmissions will never succeed if that number is less then
> >100%. I can't get 100% out of my system regardless of what I've tried,
> >including two different distro's, two different MBs, etc.
> >
> >Rich
> >
> >------------------------
> >
> >  
> >
> >>H,
> >>
> >>We have a fax machine connected to a FXS modules on TDM400P card. There 
> >>is an FXO module connected to a pots line. We can receive faxes okay but 
> >>we seem to be having trouble sending them. The connection is bridged 
> >>between the appropriate ZAP channels but it just hangs there. The remote 
> >>fax answers and the fax machine indicates that it is connecting - but 
> >>then we get transmission errors and the fax fails. I had tuned the line 
> >>to get rid echos using ./ztmonitor (works great by the way) could I have 
> >>tuned it too much or should I tune each channel separately (you can see 
> >>my rxgain and txgain settings in zapata.conf)? Here are my files.
> >>
> >>************
> >>zapata.conf
> >>
> >>[trunkgroups]
> >>
> >>[channels]
> >>echocancel=yes
> >>echocancelwhenbridged=yes
> >>echotraining=yes
> >>rxgain=14.0
> >>txgain=4.0
> >>usecallerid=yes
> >>hidecallerid=no
> >>callwaiting=no
> >>threewaycalling=no
> >>transfer=no
> >>immediate=no
> >>faxdetect=both
> >>
> >>context=incoming-home
> >>signalling=fxs_ks
> >>group=1
> >>channel => 1,2
> >>
> >>context=local
> >>signalling=fxo_ks
> >>group=2
> >>channel => 3
> >>
> >>context=longdistance
> >>signalling=fxo_ks
> >>group=3
> >>channel => 4
> >>
> >>***********************************
> >>extensions.conf
> >>
> >>[general]
> >>#include macros.incl
> >>
> >>[incoming-home]
> >>exten => s,1,Goto(extensions-home,100,1)
> >>exten => t,1,Goto(extensions-home,100,1)
> >>exten => i,1,Goto(extensions-home,100,1)
> >>
> >>[extensions-home]
> >>include => parkedcalls
> >>
> >>;Operator queue, Operator Console, and Receptionist Phone
> >>exten => 100,1,Answer()
> >>exten => 100,2,Queue(extensions-home|trn|||120)
> >>
> >>;Office Personnel
> >>exten => _30[0-1],1,Macro(stdexten,${EXTEN},SIP/${EXTEN})
> >>exten => _31[0-4],1,Macro(stdexten,${EXTEN},SIP/${EXTEN})
> >>exten => _399,1,Macro(stdexten,${EXTEN},SIP/${EXTEN})
> >>exten => _40[0-1],1,Macro(stdexten,${EXTEN},SIP/${EXTEN})
> >>exten => _499,1,Macro(stdexten,${EXTEN},SIP/${EXTEN})
> >>
> >>;Spa Personnel
> >>exten => _500,1,Macro(stdexten,${EXTEN},SIP/${EXTEN})
> >>exten => _51[0-2],1,Macro(stdexten,${EXTEN},SIP/${EXTEN})
> >>exten => 590,1,Dial(ZAP/3,20)
> >>
> >>;Voicemail Main
> >>exten => 800,1,Answer
> >>exten => 800,2,VoicemailMain
> >>
> >>;Agent Login
> >>exten => 801,1,AgentCallbackLogin(,, at extensions-home)
> >>
> >>;Voice Conferencing
> >>exten => _85X,1,Answer
> >>exten => _85X,2,MeetMe(${EXTEN})
> >>
> >>;exten => i,1,Voicemail(s300)
> >>;exten => t,1,Voicemail(s300)
> >>
> >>exten => fax,1,Dial(ZAP/4,20)
> >>exten => fax,2,Congestion
> >>exten => fax,102,Congestion
> >>
> >>[local]
> >>ignorepat => 9
> >>exten => _9NXXXXXX,1,Dial(${OUTBOUNDTRUNK}/${EXTEN:1})
> >>exten => _9NXXXXXX,2,Congestion(5)
> >>exten => _9NXXXXXX,102,congestion(5)
> >>exten => 911,1,Dial(${OUTBOUNDTRUNK}/911)
> >>exten => 9911,1,Dial(${OUTBOUNDTRUNK}/911
> >>include => extensions-home
> >>
> >>[longdistance]
> >>ignorpat => 9
> >>exten => _91NXXNXXXXXX,1,Dial(${OUTBOUNDTRUNK}/${EXTEN:1})
> >>exten => _91NXXNXXXXXX,2,Congestion(5)
> >>exten => _91NXXNXXXXXX,102,congestion(5)
> >>include => local
> >>
> >>
> >>[globals]
> >>OUTBOUNDTRUNK=Zap/G1
> >>
> >>PSTN1=Zap/1
> >>PSTN2=Zap/2
> >>
> >>PHONE1=Zap/3
> >>PHONE2=Zap/4
> >>
> >>***************************
> >>modules.conf
> >>
> >>modules]
> >>autoload=yes
> >>;
> >>noload => pbx_gtkconsole.so
> >>noload => pbx_kdeconsole.so
> >>;
> >>; Intercom application is obsoleted by
> >>; chan_oss.  Don't load it.
> >>;
> >>noload => app_intercom.so
> >>;
> >>; Explicitly load the chan_modem.so early on to be sure
> >>; it loads before any of the chan_modem_* 's afte rit
> >>;
> >>noload => chan_modem.so
> >>noload => chan_modem_aopen.so
> >>noload => chan_modem_bestdata.so
> >>noload => chan_modem_i4l.so
> >>noload => chan_phone.so
> >>noload => chan_skinny.so
> >>noload => chan_iax2.so
> >>;
> >>load => res_musiconhold.so
> >>;
> >>; Load either OSS or ALSA, not both
> >>; By default, load OSS only (automatically) and do not load ALSA
> >>;
> >>;noload => chan_alsa.so
> >>noload => chan_oss.so
> >>;
> >>; Module names listed in "global" section will have symbols globally
> >>; exported to modules loaded after them.
> >>;
> >>[global]
> >>
> >>**************************
> >>
> >>CLI output
> >>
> >>  -- Starting simple switch on 'Zap/2-1'
> >>    -- Executing Goto("Zap/2-1", "extensions-home|100|1") in new stack
> >>    -- Goto (extensions-home,100,1)
> >>    -- Executing Answer("Zap/2-1", "") in new stack
> >>    -- Executing Queue("Zap/2-1", "extensions-home|trn|||120") in new stack
> >>    -- Redirecting Zap/2-1 to fax extension
> >>    -- User disconnected from queue extensions-home when they almost made it
> >>  == Spawn extension (extensions-home, fax, 0) exited non-zero on 'Zap/2-1'
> >>    -- Executing Dial("Zap/2-1", "ZAP/4|20") in new stack
> >>    -- Called 4
> >>    -- Zap/4-1 is ringing
> >>    -- Zap/4-1 is ringing
> >>    -- Zap/4-1 answered Zap/2-1
> >>    -- Attempting native bridge of Zap/2-1 and Zap/4-1
> >>    -- Hungup 'Zap/4-1'
> >>  == Spawn extension (extensions-home, fax, 1) exited non-zero on 'Zap/2-1'
> >>    -- Hungup 'Zap/2-1'
> >>
> >>*****************************
> >>
> >>Thanks
> >>_______________________________________________
> >>--Bandwidth and Colocation sponsored by Easynews.com --
> >>
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> >>    
> >>
> >
> >---------------End of Original Message-----------------
> >
> >
> >
> >
> >
> >
> >  
> >
> 
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