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

[Tom Lowe]

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