[asterisk-ss7] BIG Echo on SS7 channels.

[Jean Cérien]

Hi

I had a similar issue, digium card with echo canceller. I was under the
impression that the EC was turned on by default, while it actually requires
explicit activation.

in ss7.conf :

; Echo cancellation
; echocancel can be one of: no, 31speech (enable only when transmission
medium is 3.1Khz speech), allways
echocancel => allways
; echocan_train specifies training period, between 10 to 100 msec
echocan_train => 100
; echocan_taps specifies number of taps, 32, 64, 128 or 256
echocan_taps => 128

-- note that allways is spelt with 2 l

You may search some of my posts on this list archive - I had an issue w/ the
EC resetting, and some digium staff helped me through this list.

Hope this helps

J.



On Wed, Aug 11, 2010 at 5:52 PM, Jorge Antillon <jantillon at ticom.co.cr>wrote:

> Hi,
>
> I have echo issues with chan_ss7 1.3, so for one:
>
> system.conf
>
> span=1,1,0,ccs,hdb3
> span=2,2,0,ccs,hdb3
> span=3,3,0,ccs,hdb3
> span=4,4,0,ccs,hdb3
>
> bchan=1-31
> bchan=32-62
> bchan=63-93
> bchan=94-124
>
> loadzone        = nl
>
> as for chan_dahdi, its blank except for [trunkgrous] and [channels] labels.
>
> Now, the echo is very consistent and happens on all five boxes (5boxes x 4
> E1s each) , any clues?
>
>      Jorge Antillon
> CEO - CTO
> ticom - Costa Rica Telecom
>
>
>
>
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