[Asterisk-Users] Echo problem on conferencing....no analog interfaces

[Steve Brown]

There are probably echo suppressors on both ends of the LD circuit 
between NJ and CA, but none on the local NJ circuit.

Steve

Tom Lowe wrote:

>Not a silly question.  I've given that thought.
>
>To be honest, I'm not sure what kind of phone the California or NJ
>callers were using.  However, we've had numerous conferece calls using
>many other services and have never had echo problems.
>
>The problem, in this case, more likely has something to do with the NJ
>leg of the call (call 2), and possibly my leg (I was caller 1), since
>the echo happened when it was just the two of us.  If anything, the
>"problem phone" would be my phone.  This is a Lucent Partner phone
>system and phone.  Now, if it was MY phone causing the problem, then
>both caller's 2 and 3 should be hearing their echo.  But they weren't.
>
>I'm stumped.
>
>
>For anyone who's trying to figure out how I'm doing an E1 PRI here in
>the US, it's working like this:
>
>Verizon T1/PRI  -->  Cisco VCO/4K (Programmable switch)  -->  E1/PRI -->
>MyAsterisk
>
>The other 2 calls are going like this:
>
>888 number --> SS7 --> VCO/4K --> T1/PRI --> Asterisk_1 --> IAX -->
>MyAsterisk
>
>Tom
>
>
>
>Tom Lowe, President/CTO
>Compro Technologies, Inc.
>512 South Main Street
>Forked River, NJ  08731
>My Phone:  +1-212-904-0788
>Main Phone:  +1-609-242-2211
>Fax:  +1-609-242-2212
>Email:  tom at comprotech.com
>Web: www.comprotech.com
> 
>
>
>  
>