[Asterisk-Users] Static problems with Asterisk + Polycom phones

[volfman at keystreams.com]

FYi,

A zttest reports:

--- Results after 144 passes ---
Best: 100.000000 -- Worst: 99.890137 -- Average: 99.993462

Roman


Quoting Roman Volf <volfman at keystreams.com>:

> Hey all,
>
> I'm having problems where there is significant static when making SIP 
> -> PSTN calls. SIP -> SIP and SIP -> VM calls are totally clear and 
> fine.
>
> Here's the setup:
>
> Polycom 601,501, and ten 301s.
> Digum 2400 TDM card w/echo cancelling, 12 FXO ports.
> The TDM card is on IRQ 5 with nothing else on it.
>
> Server Specs:
> Asus P4P800E Deluxe
> P4 3.0 Ghz
> 1 GB Ram
> 80 GB SATA HD
>
> - There is no static when using a normal phone direct to the 66 block.
> - The sound is also a bit low, and bumping the volume on the Polycom 
> phones makes the static alot worse (obviously)
>
> zapata.conf settings:
> [channels]
>
> language=en
> context=from-pstn
> signalling=fxs_ks
>
> usecallerid=yes
> hidecallerid=no
> callwaiting=no
> usecallingpres=yes
> callwaitingcallerid=yes
> threewaycalling=yes
> transfer=yes
> cancallforward=yes
> callreturn=yes
> echocancel=128
> echocancelwhenbridged=yes
> echotraining=500
> rxgain=6
> txgain=3
> group=0
> callgroup=1
> pickupgroup=1
> immediate=yes
> faxdetect=no
>
>
> zaptel.conf settings:
>
> fxsks=17-24
> loadzone        = us
> defaultzone     = us
>
>
>
> - Running Fedora Core 4 - Kernel 2.6.14-1.1653_FC4smp
> - USB is completely disabled.
>
> cat /proc/interrupts:
>           CPU0       0:    3115334          XT-PIC  timer
>  1:          8          XT-PIC  i8042
>  2:          0          XT-PIC  cascade
>  5:   12453626          XT-PIC  wctdm24xxp
>  8:          1          XT-PIC  rtc
> 10:      93751          XT-PIC  libata
> 11:     907892          XT-PIC  SysKonnect SK-98xx, eth1
> 15:     111542          XT-PIC  ide1
> NMI:          0
> LOC:    3115228
> ERR:          0
> MIS:          0
>
>
>
>
>
> Any other information you need to help me figure this out, please let 
> me know.
>
> - Roman
>
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