-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On Tuesday 14 February 2006 10:56, Sean Cook wrote:
we had originally purchased a tdm2400 with echo cancellation but
couldn't fit it in the chassis.
Spent 3 - 4 hours tracking down the source of the echo to no
avail, enabled mark2 echo cancel and aggressive echo cancel to
get the system to where the customer was satisfied with the
performance.
If you have the echo cancellation hardware then the choice of
canceller has *zero* effect on the echo cancellation UNLESS you
disable VPM support. If VPM support is enabled (default) and
detected, then the echocancel=yes enables the hardware echo
cancellation. The software echo canceller is not used, and all the
options of choice of cancellation algorithm and agressive options
do nothing in this case.
We ended up using one of the TDM400, with no echo cancellation. Which
yes... I understand hw echo cancellation is the preffered method...
Came back to the lab, pulled out a duplicate system, had the same
problem. So I swapped out the Digium card with an OpenSwitch6,
all of my problems went away! No echo, great call volumes and
better yet, I picked up the ability to swap the ports from FXS to
FXO. I will admit there was some difficulty with the vpb drivers
as some things have changed in the 2.6.11 kernel that cause it
to fail, but Voicetronix support was GREAT! I am extremely
pleased with this hardware and it integrated into AMP with almost
no effort.
You don't specifically mention it, but did you contact Digium
support throughout any of this? Offhand, what is the pricing like
between the TDM2400E and the OpenSwitch6?
With comparable number of ports the difference is about the same...
OpenSwitch 12 ( to get the same port count ) = 1500, the TDM2400 =
1345 + break out $119 =~ 1500.00
-BEGIN PGP SIGNATURE-
Version: GnuPG v1.4.2 (MingW32)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iD8DBQFD8h7ay9wPyZpnL2URAig5AJ9xuxeQG2UoOpAk87WnGaiEdZsQYQCcC+9D
cRMBR8fxBBl+XT0F08vqJ0w=
=I8yG
-END PGP SIGNATURE-
___
--Bandwidth and Colocation provided by Easynews.com --
Asterisk-Users mailing list
To UNSUBSCRIBE or update options visit:
http://lists.digium.com/mailman/listinfo/asterisk-users
