asterisk users - Jul 2006 - Finding far end echo in Verizon network

This is a weird one.

Network:
Asterisk ver 1-0-9 on DL360.
10 Cisco 7960g phones with 3.8.2 SIP Load.
Gateway - Cisco 2811 router with 4 x verizon bri's.
Network - Private vlan with 1ms response times to all
devices.

Issue:
Intermittent echo on outbound/inbound calls. Users
hearing their own voice about 0.5sec later.

Tried so far:
Upgraded firmware on some phones to 3.8.2
Upgraded software on Cisco router.
Changed gain and attentuation settings on cisco router
Got Verizon to test bris
Moved rtp from asterisk direct to phone and router
(canreinvite=yes)
load tested asterisk

None of the above made any difference.

They are hearing their own voice so that means the
issue is on the far end. But should it be up to me to
control the possible delay or slippage in the verizon
bri network?

Any help much appreciated.

Taf.


	
	
		
___________________________________________________________ 
All new Yahoo! Mail "The new Interface is stunning in its simplicity and
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Same problem here, the far end has to complain to Verizon for anything
to happen unless you want to get an echo canceler.   I have know calls
routed via a ISTP provider that is known not to echo on Verizon
networks.



On 7/19/06, carl Lougher <c_lougher@yahoo.co.uk>
wrote:
> This is a weird one.
>
> Network:
> Asterisk ver 1-0-9 on DL360.
> 10 Cisco 7960g phones with 3.8.2 SIP Load.
> Gateway - Cisco 2811 router with 4 x verizon bri's.
> Network - Private vlan with 1ms response times to all
> devices.
>
> Issue:
> Intermittent echo on outbound/inbound calls. Users
> hearing their own voice about 0.5sec later.
>
> Tried so far:
> Upgraded firmware on some phones to 3.8.2
> Upgraded software on Cisco router.
> Changed gain and attentuation settings on cisco router
> Got Verizon to test bris
> Moved rtp from asterisk direct to phone and router
> (canreinvite=yes)
> load tested asterisk
>
> None of the above made any difference.
>
> They are hearing their own voice so that means the
> issue is on the far end. But should it be up to me to
> control the possible delay or slippage in the verizon
> bri network?
>
> Any help much appreciated.
>
> Taf.
>
>
>
>
>
> ___________________________________________________________
> All new Yahoo! Mail "The new Interface is stunning in its simplicity
and ease of use." - PC Magazine
> http://uk.docs.yahoo.com/nowyoucan.html
> _______________________________________________
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