asterisk users - Jun 2006 - sound quality problem on mISDN

Hi

I've problem with incoming call quality to GSM gateway connected to 
beronet card (BN8S0), 

			   
   -----> [ GSM Gateway ] -------> [ BN8S0 ]  ==== asterisk

Port connected to GSM gatway is in TE mode , gateway is in NT mode , 
When I dialin to cellphone numer , call goes to 'from-eragsm' context,
to Echo application.

[from-eragsm]
exten => 700,1,Goto(600,1)
exten => 600,1,Answer()
exten => 600,2,Playback(demo-echotest)
exten => 600,n,Echo
exten => 600,n,Playback(demo-echodone)

misdn.conf:

[eragsm-gw]
ports=1ptp
context=from-eragsm
nationalprefix=0
internationalprefix=00
echocancel=yes
echocancelwhenbridged=no
dialplan=2
msns=600,700

Everything is good besides call quality, sound is choppy, with lot of 
noises, when I tell one , two , three ... test , I hear only three, sometimes
more ,

I've already tried to increase rxgain/txgain for this channel , but It
didn't help much. Outgoing call quality is rather normal.

TIA for any help with this.

/pch

-- 
Dyslexia bug unpatched since 1977 ...
exploit has been leaked to the underground.

Have you only one BN-Card? or more?
i have two cards, had compareable problems.

PCM was the magic word ...

from my misdn-init.conf:

card=1,0x8,pcm_slave,ignore_pcm_frameclock          //important!
option=9,master_clock                                              // 9
for port 9
pcm=1,1
    //not sure, if this is really neaded


> Hi
>
> I've problem with incoming call quality to GSM gateway connected to 
> beronet card (BN8S0), 
>
> 			   
>    -----> [ GSM Gateway ] -------> [ BN8S0 ]  ==== asterisk
>
>