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

[Tom Lowe]

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
 


-----Original Message-----
From: David Gomillion [mailto:dgomillion at eyecarenow.com] 
Sent: Wednesday, December 03, 2003 8:54 PM
To: asterisk-users at lists.digium.com
Subject: RE: [Asterisk-Users] Echo problem on conferencing....no analog
interfaces


Silly question: what kind of phone was the person in California calling
on? Some phones give a local "echo" while you talk.  If that happens,
then I could see it causing problems...

Just a thought... I hope it helps!

-----Original Message-----
From: asterisk-users-admin at lists.digium.com
[mailto:asterisk-users-admin at lists.digium.com] On Behalf Of Tom Lowe
Sent: Wednesday, December 03, 2003 6:24 PM
To: asterisk-users at lists.digium.com
Subject: [Asterisk-Users] Echo problem on conferencing....no analog
interfaces

Okay...here's one for all of you....

3 party meet-me conference:

Call 1:  Comes in to MyAsterisk on an E1 PRI into the system.  All TDM,
no VoIP at all involved.  No echo at all. Call 2:  Call comes in via
IAX....(TDM -> Asterisk_1 -> IAX/GSM -> MyAsterisk.  Caller immediately
hears his own echo Call 3:  Call comes in via IAX....(TDM -> Asterisk_1
-> IAX/GSM -> MyAsterisk.  Caller hears no echo at all.

(Caller 2 and 3 called the same telephone number....caller 2 is in the
same state (NJ) and caller 3 is in California) Caller 2 hung up and
called back in....still hears echo.

Any ideas?

Are there any settings that anyone can suggest to try?

Tom
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