[Asterisk-Users] one-way audio and isdn4linux

[andre]

I'm replying to my own email just for future reference.
The problem has been solved by moving away from isdn4linux and
installing capi4linux and chan_capi.

This was possible with the patch for chan_capi version 0.3.1 made
available a couple of days ago.

The quality of sound is also excellent btw.

cheers, andre

On Wed, Apr 21, 2004 at 08:31:54PM +0200, andre wrote:
|Hi,
|
|Apologies in advance for the lengthy email.
|
|I'm new to asterisk and have trouble with isdn4linux.
|
|The setup is very basic like this:
|
|   winxp ------- asterisk -------- winxp
|   x-lite           |              x-lite
|                    |
|                   pstn
|
|The hardware involved is:
|Compaq EVO with RH9/kernel 2.4.20-30.9.
|Fritz!Card PCI v2
|Asterisk CVS-04/17/04-21:36:18
|
|Basically I run:
|modprobe -a hisax_fcpcipnp
|before I start asterisk with -vvvvvgc
|
|The configs are like this:
|MODEM.CONF:
|[interfaces]
|context=default
|driver=aopen
|driver=i4l
|language=en
|type=autodetect
|stripmsd=0
|dialtype=tone
|mode=immediate
|device => /dev/ttyI0
|device => /dev/ttyI1
|group=1
|msn=0208080808
|incomingmsn=*
|device => /dev/ttyI0
|device => /dev/ttyI1
|
|EXTENSIONS.CONF:
|[general]
|static=yes
|writeprotect=no
|[globals]
|TRUNK=Modem/g1
|TRUNKMSD=0
|[default]
|exten => _9001,1,Dial(${TRUNK}:0208080809,60,tr)
|
|Firewalls are disabled on all machines (doublechecked).
|Sip calls between the two x-lite clients work consistently.
|After I boot the asterisk server I can make one call succesfull to the
|pstn (two-way voice). Subsequent calls from x-lite to pstn only give me
|one-way voice; the direction that works is pstn->sip: a call is
|cleary established, I just cannot understand why voice is lacking
|sip->pstn or why it works the first time after a reboot.
|
|I had a look on the sip-clients and on the server with ethereal, and
|two-way traffic is happening consistently.
|Show channels within the CLI saw 'frames in' and 'frames out' augmenting
|on all channels.
|Looking at /dev/isdnctrl I see slightly different isdn messages, but in
|both cases I got a: L3DC ChangeState ST_L3_LC_ESTAB
|
|I have tried to compile chan_capi but ran into the same issue as
|described on a posting on april 12th:
|[Asterisk-Users] Trouble compiling chan_capi on Suse 9.0
|
|As I had two servers and two fritz cards I tried both with identical
|software and both behave the same.
|
|I hope I have made a stupid mistake and somebody on the list can point
|it out to me. Every suggestion is of course most welcome.
|
|I'm a bit unsure about the machines though: both machines crashed one or
|more times completely (froze up) during a call to the pstn and dumped
|core. Basically a hardware reset was all that I could do. One of these
|times I was looking at the console and wrote down this:
|
|Code: 8b 38 8b 58 04 8b 68 10 c7 44 24 18 00 00 00 00 ff 4c 24 40
| <0>Kernel Panic: Aiee, killing interrupt handler!
| In interrupt handler - not syncing