asterisk users - Jan 2016 - 11.21.0 : echo woes : can't install canceller

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

On 01/28/2016 03:39 PM, sean darcy wrote:
> 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
>
>
And even if I do manually load the oslec kernel module, I don't think 
it's actually being used

cat /proc/dahdi/1
Span 1: WCTDM/4 "Wildcard TDM400P REV I Board 5" (MASTER)

1 WCTDM/4/0 FXOKS (In use)
2 WCTDM/4/1 FXOKS (In use)
3 WCTDM/4/2 Reserved
4 WCTDM/4/3 FXSKS (In use) RED

AFAIK, the echo canceller should show up here.

sean