[asterisk-users] Echo Cancellation Problem - Invalid Argument?!?

[Tim Nelson]

Well, I "downgraded" this box to Asterisk 1.4.38 and all is well again. Echo cancellation works properly, no problems, no errors.

I have to assume this is a bug in Asterisk 1.8.x or Wanpipe 3.5.18.

--Tim

----- Original Message -----
> Greetings folks-
> 
> I'm experiencing issues with a freshly installed box. When a call
> comes in via PRI (Sangoma AFT-A104), I see this in my logs:
> 
> [Dec 15 14:26:10] WARNING[23546] chan_dahdi.c: Unable to enable echo
> cancellation on channel 12 (Invalid argument)
> [Dec 15 14:26:10] WARNING[23546] chan_dahdi.c: Unable to enable echo
> cancellation on channel 8 (Invalid argument)
> [Dec 15 14:26:10] WARNING[23546] chan_dahdi.c: Unable to enable echo
> cancellation on channel 10 (Invalid argument)
> [Dec 15 14:26:10] WARNING[23546] chan_dahdi.c: Unable to enable echo
> cancellation on channel 9 (Invalid argument)
> 
> Relevant components:
> 
> Asterisk:
> Asterisk SVN-trunk-r290509 built by root @ prigw01 on a i686 running
> Linux on 2010-11-30 22:12:05 UTC
> 
> DAHDI:
> dahdi-linux-complete-2.4.0+2.4.0
> 
> LibPRI:
> libpri-1.4.11.5
> 
> Wanpipe:
> wanpipe-3.5.18
> 
> Kernel:
> Linux prigw01 2.6.32-24-generic #39-Ubuntu SMP Wed Jul 28 06:07:29 UTC
> 2010 i686 GNU/Linux
> 
> The card does not have a hardware echo canceler. It should use MG2 as
> specified in DAHDI's system.conf:
> 
> #autogenerated by /usr/sbin/wancfg_dahdi do not hand edit
> #autogenrated on 2010-12-08
> #Dahdi Channels Configurations
> #For detailed Dahdi options, view /etc/dahdi/system.conf.bak
> loadzone=us
> defaultzone=us
> 
> #Sangoma A104 port 1 [slot:2 bus:2 span:1] <wanpipe1>
> span=1,1,0,esf,b8zs
> bchan=1-23
> #dchan=24
> echocanceller=mg2,1-23
> hardhdlc=24
> 
> 
> And, from chan_dahdi.conf:
> ;Sangoma A104 port 1 [slot:2 bus:2 span:1] <wanpipe1>
> switchtype=national
> context=ldrouted
> group=1
> echocancel=yes
> signalling=pri_net
> channel =>1-23
> 
> 
> Any thoughts, pointers, suggestions? The echo is horrible, please help
> me make it stop. :-)
>