[Asterisk-Users] Asterisk Echo problems, Urgent, please help,

[Ian Bonham]

Hi all,

I hope someone can help, as I have an urgent problem.

I've got a production Asterisk server thats been deployed, but we are seeing 
a strange voice echo problem. There is about a 250ms echo for the users in 
the office, and they are hearing their own voice back at them.

I'm running the CVS Head code, on RH9.0. This is on a P4 box with 2gb of 
memory. The client SIP phones are Polycom Soundpoint IP600's, WiFi ZyXel 
2000w handsets, and X-Lite (free) PC clients. All see the same problem. 
There is a bridge into the POTS (BT's SystemX) using a Voicetronix 
OpenSwitch12 card and the vpbhp driver.

The echo occurs on both SIP->POTS calls, and SIP->SIP calls. I've tried a 
number of volume adjustments to correct the echo but it is always the same.

If anyone has any ideas I'd really appriciate some help, as this is a major 
urgency,

Many many thanks,

Ian Bonham

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