Re: [asterisk-users] Faxing issues
What's the bets way to verify T.38 is being used on both incoming an outgoing transaction? On Fri, May 22, 2009 at 8:08 PM, Lee Howard fax...@howardsilvan.com wrote: Todd S wrote: Our call path is Sip trunk from MAX TNT - Asterisk - T1 - Adtran endpoint converting sip trunk to copper line for house wiring. Users at the endpoint can receive faxes without a problem. However, sending faxes are not so friendly. 1 out of 5 faxes will send successfully. The remaing 4 continually fail with the fax machines reporting Poor Line Quality. QoS is setup on both ends and working as expected across all traffic to and from both sides of the call. Voice quality is good on calls from the same lines. I've checked all sides and had all vendors look at their equipment and they are all pointing the finger at each other. I've got sip traces from both ends and both look good with the exception of random BYE's being sent from the Adtran side of the call during random fax calls. T.38 is enabled on both ends as well. Anyone have any possible ideas where to look further or an idea of how i could at least improve the situation? Is T.38 actually being used? If not, then please see: http://hylafax.sourceforge.net/docs/fax-over-voip.pdf If T.38 is being used then it's probably due to a T.38 bug in one or more of the gateways, and you'll need to work with the provider of that T.38 gateway for a resolution. Thanks, Lee. ___ -- 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 ___ -- 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
Re: [asterisk-users] Faxing issues
Todd S aster...@myzionetworks.com writes: What's the bets way to verify T.38 is being used on both incoming an outgoing transaction? I don't know about best, but there's sip set debug ip whatever, or my personal favourite: tcpdump -s0 -vnieth0 udp You can easily tell if t38 is used because the UDP traffic will (almost) stop being two-way and instead just come from the sender of the fax. The size of the packets will also change (t38 packets are quite small). You can also see it by reading the SIP packets, but that takes actual work. /Benny ___ -- 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
Re: [asterisk-users] Faxing issues
Todd S wrote: What's the bets way to verify T.38 is being used on both incoming an outgoing transaction? 3 to 1 in favour of not working. ;) PaulH ___ -- 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
[asterisk-users] Faxing issues
We seem to be having a good bit of issues sending faxes and can't pinpoint the issue. I'm hoping someone here may have a different outlook on the issue that leads to a resolution. Our call path is Sip trunk from MAX TNT - Asterisk - T1 - Adtran endpoint converting sip trunk to copper line for house wiring. Users at the endpoint can receive faxes without a problem. However, sending faxes are not so friendly. 1 out of 5 faxes will send successfully. The remaing 4 continually fail with the fax machines reporting Poor Line Quality. QoS is setup on both ends and working as expected across all traffic to and from both sides of the call. Voice quality is good on calls from the same lines. I've checked all sides and had all vendors look at their equipment and they are all pointing the finger at each other. I've got sip traces from both ends and both look good with the exception of random BYE's being sent from the Adtran side of the call during random fax calls. T.38 is enabled on both ends as well. Anyone have any possible ideas where to look further or an idea of how i could at least improve the situation? Thanks. ___ -- 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
Re: [asterisk-users] Faxing issues
Todd S wrote: Our call path is Sip trunk from MAX TNT - Asterisk - T1 - Adtran endpoint converting sip trunk to copper line for house wiring. Users at the endpoint can receive faxes without a problem. However, sending faxes are not so friendly. 1 out of 5 faxes will send successfully. The remaing 4 continually fail with the fax machines reporting Poor Line Quality. QoS is setup on both ends and working as expected across all traffic to and from both sides of the call. Voice quality is good on calls from the same lines. I've checked all sides and had all vendors look at their equipment and they are all pointing the finger at each other. I've got sip traces from both ends and both look good with the exception of random BYE's being sent from the Adtran side of the call during random fax calls. T.38 is enabled on both ends as well. Anyone have any possible ideas where to look further or an idea of how i could at least improve the situation? Is T.38 actually being used? If not, then please see: http://hylafax.sourceforge.net/docs/fax-over-voip.pdf If T.38 is being used then it's probably due to a T.38 bug in one or more of the gateways, and you'll need to work with the provider of that T.38 gateway for a resolution. Thanks, Lee. ___ -- 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
[asterisk-users] Faxing issues
I have spandsp, rxfax and asterisk-1.4.2 installed and whenever a fax call
comes in we get this. This isn't good. Any ideas?
[New Thread -1215390800 (LWP 8504)]
-- Accepting call from 'DELETED' to '539' on channel 0/1, span 1
-- Executing [EMAIL PROTECTED]:1] Set(Zap/1-1, DIALEDNUM=539) in
new stack
-- Executing [EMAIL PROTECTED]:2] Answer(Zap/1-1, ) in new stack
-- Executing [EMAIL PROTECTED]:3] Ringing(Zap/1-1, ) in new stack
-- Executing [EMAIL PROTECTED]:4] Wait(Zap/1-1, 4) in new stack
[New Thread -1215636560 (LWP 8505)]
[Thread -1215636560 (LWP 8505) exited]
-- Redirecting Zap/1-1 to fax extension
== Spawn extension (telco-incoming, fax, 0) exited non-zero on 'Zap/1-1'
-- Executing [EMAIL PROTECTED]:1] Goto(Zap/1-1,
internal-ext|fax-39|1) in new stack
-- Goto (internal-ext,fax-39,1)
-- Executing [EMAIL PROTECTED]:1] Macro(Zap/1-1,
faxmail|[EMAIL PROTECTED]) in new stack
-- Executing [EMAIL PROTECTED]:1] Set(Zap/1-1,
FAXFILE=/var/spool/asterisk/fax/1175648783.0.tif) in new stack
-- Executing [EMAIL PROTECTED]:2] Set(Zap/1-1, EMAILADDR=
[EMAIL PROTECTED]) in new stack
-- Executing [EMAIL PROTECTED]:3] RxFAX(Zap/1-1,
/var/spool/asterisk/fax/1175648783.0.tif) in new stack
Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread -1215390800 (LWP 8504)]
0x08082599 in __ast_read (chan=0x9a17458, dropaudio=0) at channel.c:2128
2128if (AST_LIST_EMPTY(chan-readq) ||
!AST_LIST_NEXT(AST_LIST_FIRST(chan-readq), frame_list)) {
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Re: [Asterisk-Users] Faxing issues (no VoIP involved)
On Tue, 2004-11-09 at 06:38, Daniel Jimenez wrote: Hey guys. I'm having constant problems with faxing. All my calls come in via PRI to my t100p, then I have a TDM w/FXS ports that I have the fax machine plugged into. About half the time the faxes come in half complete or garbled. I have echocan off. I'm not sure what else to try. Anyone have any pointers? You could try: exten = _1NXXNXX,1,Dial,Zap/47/BYEXTENSION||d the d at the end means, that we are talking about a data call, that is passed through, taking, that you haven't set that yet. Kind regards, Martin List-Petersen ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Faxing issues (no VoIP involved)
hmmm funny enough that option seems to have disappeared from app_dial, at least from it's docs :) On Tue, 09 Nov 2004 10:44:12 +, Martin List-Petersen [EMAIL PROTECTED] wrote: On Tue, 2004-11-09 at 06:38, Daniel Jimenez wrote: Hey guys. I'm having constant problems with faxing. All my calls come in via PRI to my t100p, then I have a TDM w/FXS ports that I have the fax machine plugged into. About half the time the faxes come in half complete or garbled. I have echocan off. I'm not sure what else to try. Anyone have any pointers? You could try: exten = _1NXXNXX,1,Dial,Zap/47/BYEXTENSION||d the d at the end means, that we are talking about a data call, that is passed through, taking, that you haven't set that yet. Kind regards, Martin List-Petersen ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users -- Michael Bielicki ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Faxing issues (no VoIP involved)
On November 9, 2004 05:44 am, Martin List-Petersen wrote: You could try: exten = _1NXXNXX,1,Dial,Zap/47/BYEXTENSION||d the d at the end means, that we are talking about a data call, that is passed through, taking, that you haven't set that yet. As a datapoint I send and receive probably 50 or more faxes a day without any issues whatsoever. PRI - *1 - IAX2 - *2 - Adit600 - 2 Fax machines The IAX2 link is one hop (SDSL from our colo downtown to our office 2km away), *1 has a TE405P and *2 has a T100P. I'm not using any kind of unusual dial command or options. I kind of wondered what 'd' did differently, I'm interested in seeing if this helps Daniel's problem. ... We have one of *the* most picky fax machines around, too: a Canon iR3300. It refused to negotiate with several machines before we did anything at all involving VOIP. -A. ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
Re: [Asterisk-Users] Faxing issues (no VoIP involved)
On Tue, 09 Nov 2004 00:38:39 -0600, Daniel Jimenez [EMAIL PROTECTED] wrote: Hey guys. I'm having constant problems with faxing. All my calls come in via PRI to my t100p, then I have a TDM w/FXS ports that I have the fax machine plugged into. Make sure your timing is being set correctly on the t1 from the telco. I had the exact same problem before I realized I was doing things wrong. Timing is set in the /etc/zaptel.conf file in the span section: # My FXS channel bank uses internal timing span=1,0,0,esf,b8zs ^ # SPAN 2 is the T1 to telco set it to get timing here span=2,1,0,esf,b8zs ^ Once I fixed this, nearly all my fax troubles have gone away. John ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
[Asterisk-Users] Faxing issues (no VoIP involved)
Hey guys. I'm having constant problems with faxing. All my calls come in via PRI to my t100p, then I have a TDM w/FXS ports that I have the fax machine plugged into. About half the time the faxes come in half complete or garbled. I have echocan off. I'm not sure what else to try. Anyone have any pointers? Thanks, -- Daniel Jimenez djimenez[at]pobox[dot]com ___ Asterisk-Users mailing list [EMAIL PROTECTED] http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
