[asterisk-users] 11.21.0 : echo woes : can't install canceller

[sean darcy]

i've got calls coming into an 11.21.0 box. The internal phones are 
analogue off a TDM400 board, and SIP extensions.

Using an analogue internal phone, the remote party always hears an echo 
on it's side. We do not hear an echo. Doesn't matter who is the calling 
party.

But if we use a SIP extension, no echo.

I've built /lib/modules/4.3.3-303.fc23.x86_64/dahdi/dahdi_echocan_oslec.ko

And requested oslec echo cancel:

grep oslec /etc/dahdi/system.conf
echocanceller=oslec,1,2,4

grep echo /etc/asterisk/chan_dahdi.conf
echocancel=yes
echocancelwhenbridged=no
echotraining=yes

but it's never loaded:

# lsmod | grep echo
[root at asterisk ~]#

dahdi_cfg -vvv
DAHDI Tools Version - 2.10.0

DAHDI Version: 2.11.0
Echo Canceller(s):
Configuration
======================


Channel map:


0 channels to configure.

I can manually insert the oslec module using modprobe.

Thats seems to work.

CLI> dahdi show version
DAHDI Version: 2.11.0 Echo Canceller: OSLEC

But it's not persistent across reboots.

sean