[asterisk-users] TDM400P periodic sound clicks on FXS

[Matthew Fredrickson]

Costa Tsaousis wrote:
> Hi,
> 
> I am having periodic sound clicks (2-3 per second) on all FXS of a 
> TDM400P when the remote end is my VoIP provider. However:
> 
> - recording the conversation on the asterisk, does not have the 
> glitches, although I can hear them on a real phone.
> - My VoIP provider to my VoIP phones through the same asterisk is OK.
> - TDM to TDM through the same asterisk is OK.

If TDM to TDM is ok, then it would strongly point towards a problem with 
perhaps the VoIP provider.  This is just shooting off of my hip, but 
maybe a jitterbuffer issue, like with the phones?  I think when Asterisk 
bridges SIP->SIP calls, it doesn't do any jitter buffering.

Matthew Fredrickson

> 
> I tried with and without echocancel and different values of echotrain 
> (including 'no'), without luck.
> The card is not sharing interrupts.
> 
> Any ideas?
> 
> 
> 
> Kernel is 2.6.9
> asterisk is 1.2.19-BRIstuffed-0.3.0-PRE-1y-h
> 
> # lspci
>  00:00.0 Host bridge: Intel Corporation 82945G/GZ/P/PL Memory Controller 
> Hub (rev 02)
>  00:02.0 VGA compatible controller: Intel Corporation 82945G/GZ 
> Integrated Graphics Controller (rev 02)
>  00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1)
>  00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC 
> Interface Bridge (rev 01)
>  00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE 
> Controller (rev 01)
>  00:1f.2 IDE interface: Intel Corporation 82801GB/GR/GH (ICH7 Family) 
> SATA IDE Controller (rev 01)
>  00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller 
> (rev 01)
>  01:00.0 ISDN controller: Cologne Chip Designs GmbH ISDN network 
> Controller [HFC-4S] (rev 01)
>  01:02.0 Network controller: Tiger Jet Network Inc. Tiger3XX Modem/ISDN 
> interface
>  01:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. 
> RTL-8139/8139C/8139C+ (rev 10)
> 
> # cat /proc/interrupts
>             CPU0      
>    0:    4262013          XT-PIC  timer
>    1:          8          XT-PIC  i8042
>    2:          0          XT-PIC  cascade
>    3:    4217220          XT-PIC  qozap
>    5:      11979          XT-PIC  eth0
>    8:          1          XT-PIC  rtc
>   11:      29016          XT-PIC  libata
>   15:    4211433          XT-PIC  wctdm
>  NMI:          0
>  ERR:          0
> 
> 
> 
> 
> _______________________________________________
> 
> Sign up now for AstriCon 2007!  September 25-28th.  http://www.astricon.net/ 
> 
> --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


-- 
Matthew Fredrickson
Software/Firmware Engineer
Digium, Inc.