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I did more testing.<br>
<br>
Here is a portion of extensions.conf on asterisk-pri:<br>
<br>
exten => 5,1,Dial(DAHDI/g1/14186939930,30)<br>
exten => 6,1,Answer<br>
exten => 6,2,Wait(30)<br>
exten => 7,1,Dial(DAHDI/g1/14186939930,30,D(132412983#))<br>
<br>
Here is an expert from asterisk :<br>
<br>
exten => 22,1,Dial(SIP/6@pri,30,D(132412983#))<br>
exten => 24,1,Dial(SIP/5@pri,30,D(132412983#))<br>
<br>
If I type "console dial 24", the DTMFs work poorly, and I see
messages like :<br>
<br>
[Apr 24 11:26:20] DTMF[2691]: channel.c:2907 __ast_read: DTMF end
emulation of '1' queued on DAHDI/1-1<br>
[Apr 24 11:26:20] DTMF[2691]: channel.c:2802 __ast_read: DTMF end
'1' received on SIP/omnity-00000004, duration 60120 ms<br>
[Apr 24 11:26:20] DTMF[2691]: channel.c:2842 __ast_read: DTMF end
accepted with begin '1' on SIP/omnity-00000004<br>
[Apr 24 11:26:20] DTMF[2691]: channel.c:2858 __ast_read: DTMF end
passthrough '1' on SIP/omnity-00000004<br>
[Apr 24 11:26:20] DTMF[2691]: channel.c:2874 __ast_read: DTMF begin
'1' received on DAHDI/1-1<br>
[Apr 24 11:26:20] DTMF[2691]: channel.c:2884 __ast_read: DTMF begin
passthrough '1' on DAHDI/1-1<br>
[Apr 24 11:26:20] DTMF[2691]: channel.c:2802 __ast_read: DTMF end
'1' received on DAHDI/1-1, duration 39 ms<br>
[Apr 24 11:26:20] DTMF[2691]: channel.c:2842 __ast_read: DTMF end
accepted with begin '1' on DAHDI/1-1<br>
[Apr 24 11:26:20] DTMF[2691]: channel.c:2851 __ast_read: DTMF end
'1' has duration 39 but want minimum 80, emulating on DAHDI/1-1<br>
<br>
If I type console dial 22 on asterisk, all the DTMFs are 60ms in
length and I get no unusually long DTMFs.<br>
<br>
If I type console dial 7 on asterisk-pri, all the DTMFs are properly
sent, and the remote party sees my DTMFs perfectly.<br>
<br>
So it would seem that the bug occurs when one asterisk calls the
second asterisk which bridges to a DAHDI channel.<br>
<br>
My next step is too compare the SIP signalling between the two
calls. Maybe something is different.<br>
<br>
What I find really weird is that the DTMF is incorrectly sent from
the first asterisk only when the second asterisk bridges to DAHDI.<br>
<br>
Any ideas?<br>
<br>
David<br>
<br>
On 11-04-23 11:48 AM, David wrote:
<blockquote
cite="mid:894B79E6605240599556083D9D91B566@lublinklaptop"
type="cite">
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<div><font size="2" face="Arial">Hello,</font></div>
<div> </div>
<div><font size="2" face="Arial">I installed Asterisk
1.6.2.17.3 ( latest as of yesterday ) and had multiple
problems with DTMF.</font></div>
<div> </div>
<div><font size="2" face="Arial">I have two machines, we'll
call them asterisk and asterisk-pri. Asterisk does IVR and
asterisk-pri has a PRI card in it and connects to the
PSTN. The two servers communicate via SIP with RFC2833.</font></div>
<div> </div>
<div><font size="2" face="Arial">I setup logger.conf on both
machines to display DTMF to the console. Both are built
from source.</font></div>
<div><font size="2" face="Arial">Asterisk : spandsp, dahdi,
asterisk.</font></div>
<div><font size="2" face="Arial">Asterisk-pri : spandsp,
libpri, dahdi, asterisk wanpipe</font></div>
<div> </div>
<div><font size="2" face="Arial">I eliminated AGI, hard
phones, network et al by setting up this extension :</font></div>
<div> </div>
<div><font size="2" face="Arial">exten => 22,1,Dial(<a
moz-do-not-send="true"
href="mailto:SIP/114186939930@pri1.omnity.net,30,D%28132412983">SIP/114186939930@pri1.omnity.net,30,D(132412983</a>#))</font></div>
<div> </div>
<div><font size="2" face="Arial">in default.</font></div>
<div> </div>
<div><font size="2" face="Arial">The only other non default
setting is in sip.conf I added a outboundproxy ( which
does NOT do RTP, only SIP ).</font></div>
<div> </div>
<div><font size="2" face="Arial">I called asterisk from my
hard phone ( gxp2000 ) by dialing 22.</font></div>
<div> </div>
<div><font size="2" face="Arial">I see the console DTMF
messages indicating the DTMF was sent or received. ( I
forgot to keep this output ).</font></div>
<div> </div>
<div><font size="2" face="Arial">I than watch the console DTMF
output on asterisk-pri and it showed about half the DTMFs.
The pager that was called showed the DTMFs that appeared
on the asterisk-pri console.</font></div>
<div> </div>
<div><font size="2" face="Arial">So somewhere between the two
machines, the DTMFs have disappeared. So I ran TCPDump on
asterisk and saw that close to half of the DTMF events
were never sent.</font></div>
<div> </div>
<div><font size="2" face="Arial">tcpdump -i eth0 -n -s 0
dst asterisk-pri-ip -vvv -w ~/dtmf.pcap<br>
</font></div>
<div><font size="2" face="Arial">I imported the file into
wireshark on my local machine and confirmed that the dump
almost matches what I saw on asterisk-pri.</font></div>
<div> </div>
<div><font size="2" face="Arial">So, problem 1 : Asterisk is
not sending all the DTMFs to asterisk-pri.</font></div>
<div> </div>
<div><font size="2" face="Arial">I compared the packet scan to
what I saw on asterisk-pri and noticed that between 1 and
3 dtmfs were missing.</font></div>
<div> </div>
<div><font size="2" face="Arial">Problem 2 : Asterisk-pri
loses some received DTMFs.</font></div>
<div> </div>
<div><font size="2" face="Arial">I also noticed that some of
the DTMFs coming out of asterisk had the wrong Event
Duration. I had one DTMF with a duration of about 58000 (
I believe that's 58 seconds ) but I only pressed the
button for like 1/3 of a second.</font></div>
<div> </div>
<div><font size="2" face="Arial">What I do not understand is
that I in my final test last night was using asterisk 1.6
current with centos ( os that asterisk is developed on
from my understanding ) with all default settings (
excluding logger.conf, dialplan and outboundproxy ) and I
am having problems with the DTMF.</font></div>
<div> </div>
<div><font size="2" face="Arial">Both servers were installed
with CentOS 5.5 and were updated last night, after which I
reinstalled asterisk. This did not resolve the issue.</font></div>
<div> </div>
<div><font size="2" face="Arial">I am at wit's end and do not
know where to go from here. I would really appreciate it
if someone could give me some pointers on where to go
next, what additionnal debugging steps I should perform. I
would also really appreciate if someone could propose a
solution.</font></div>
<div> </div>
<div><font size="2" face="Arial">Please help!</font></div>
<div> </div>
<div><font size="2" face="Arial">David</font></div>
<div> </div>
<div><font size="2" face="Arial">Never give up, never
surrender</font></div>
</font></div>
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