-----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
