[Asterisk-Users] chan_modem_i4l delay

[Rene Kluwen]

I had the same problem with i4l.
It seems to be a driver problem. I think i4l is depricated for a reason in
the newer Asterisk versions.

Funny thing is: When I switch the remote users into a MeetMe room. And have
the local users dial in to the same meetme room.
Then the problem disappears (at least for me).
I don't know how or why this is. But it is my experience. I am not using i4l
anymore.

Rene Kluwen
Chimit

-----Original Message-----
From: asterisk-users-bounces at lists.digium.com
[mailto:asterisk-users-bounces at lists.digium.com]On Behalf Of Alain
Degreffe
Sent: woensdag 5 april 2006 17:18
To: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] chan_modem_i4l delay










        Hi,



        I currently use  Asterisk 1.0.7-BRIstuffed-0.2.0-RC7k on a debian
sarge with a kernel 2.4.27 on a P4 3Gig with 1Gig
of memory



        When i use i4l on any call, the called party ( on the telco operator
side )  ear me with a delay of 1 sec after 1
minutes , 2 sec after 3 minutes and so on...

        After a quart hour, the delay make the conversation just impossible
!!!



        I use a tdm400P to connect my analogs phones and all is working very
well between two zap stations.

        I  have  tried different Passive isdn card ( no hfc so I can't use
zaphfc driver)



        Anybody have an idea to fix this problem ?



        BTW, I have compiled my kernel with the dtmf patch for isdn_tty.c
so....

        The cpu usage is  25% during a conversation, 75% idle

        I have a PCI latency of 32 msec

        With or without APIC, no changes....



        It seems that the voice is buffered and sended too slowly to the i4l
channel and so a delay is present afetr a short
time and became bigger minutes after minutes...



        Alain Degreffe







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