[Asterisk-Users] Help with IAX , voice Distortion or Breakage.

[Alexey Ostrovsky]

Rich Adamson wrote:

>>We have the following problem:
>> 
>>When calling via iax, the sound is off after a while - most often after 
>>about 5 minutes (sometimes later or earlier) - at one end or at both 
>>ends. While the channel is up, and packages are still being transmitted, 
>>you just can't hear anything. Sometimes you can hear something just a 
>>little, but with the voice greatly distorted, sounding like a robot's 
>>voice.
>>This problem emerges whichever phone is called or whichever phone a call 
>>is made from (softphone, ipphone, local phones thru TDM cards)
>>    
>>
>
>Without more technical data, its hard to guess. Might consider...
>
>1. if you're using cisco phones, upgrade * to current Head or Stable
>on "both" ends of the iax link. The Stable code was just fixed on Friday.
>(There could be other phones/adapters that are impacted by the iax/gsm
>timestamp problems.) I've also noticed a fair number of other fixes
>that were just recently applied to Head.
>
>  
>
OK I will  update asterisk.
Yes  we are using Cisco Phones.
And simple phones connected to  digium TDM cards.
But  problem  was  happend  even  with simple phones.

>2. if not cisco phones, check the config's on whatever phone you're using
>to ensure "transmit silence" is enabled. If you are using the xten soft
>phone, the parameter is in the Advanced Settings area.
>
>3. Check to ensure all ethernet nic adapters (and associated switch ports)
>are running in full-duplex mode, etc.
>
>4. If none of the above apply, it would be helpful to see a packet trace
>(using ethereal) at about the time the distorting/failure is occurring.
>
>  
>
I have  dump file,  but  it is about  3 Mb in archive.
So, how I can send  it  to you?

>
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-- 

Best regards,
	Alexey Ostrovsky
	Sysadmin
	Ionidea UA