On 01/12/2012 06:39 AM, Olivier wrote:
Hi,
I'm having some questions related to echo cancellation configuration
on a Digium board enabled systems (B410P, TE420, TE420B, ....) for
cases when a hardware ech canceller is present or not.
I read in TEXXX manual that when setting echocancel=yes in
chan_dahdi.conf on a VPMOCT64-equiped system, 128ms hardware echo
cancellation was enabled.
1. I'm correct thinking that it is then impossible to switch from
hardware to software echo can without removing the VPMOCT64 module
itself ?
2. Does the same also apply to HA8 and its VPMOCT032 module ?
With DAHDI 2.6 (and possibly 2.5), it is possible to override the
configuration and apply a software echo canceller to a channel even if
it has a hardware one. With prior versions, yes, the echo cancellation
module would have to be physically removed (or disabled using a
parameter to the kernel module).
--
Kevin P. Fleming
Digium, Inc. | Director of Software Technologies
Jabber: [email protected] | SIP: [email protected] | Skype: kpfleming
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
Check us out at www.digium.com & www.asterisk.org
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