[asterisk-gui] Echo

[Noah Miller]

Hi Bob -

> I'm back tinkering with the echo problem again.  Out-going calls work with
> this exception:
> [Oct 22 13:48:16] WARNING[7846]: chan_dahdi.c:2027 dahdi_enable_ec: Unable
> to en able echo cancellation on channel 5 (No such device)

You might have more luck asking this on the asterisk-users mailing
list.  It's really more of a general question.

I don't have a whole lot of experience with HPEC, but just to check -
you definitely have enough licenses for all 12 channels?

On another note: 12 channels of HPEC will require a lot of processing
power.  I remember that one system that I worked with that used HPEC
had sustained CPU usage of up to 70% when using just four channels of
HPEC.  It was a Pentium D 2.8ghz.

On yet another note: you have three TDM400's in one box?  That's a lot
of interrupts to service (3000 per second).  Do you ever have call
quality issues (other than echo)?  I guess a lot of the systems I work
with are older or lower power, so maybe newer, faster hardware can do
this.


- Noah