[Asterisk-Users] Best drivers for HFC-S ISDN cards

[Tim Robinson]

Chris
Looking at this file below you need to move the stuff below the

channel => 4-5

line to each span definition.  Anything below the channel line gets 
completely ignored!  I stand to be corrected but I think your current 
config will not have any echo cancellation at all.

I have just posted my own zapata.conf files to this list.  Take a look.

Rgds
Tim Robinson
Basingstoke, UK


Chris Bagnall wrote:
> I said:
> 
>>I've tried isdn4linux (severe echo, reproducable on every 
>>inbound call) and zaphfc (intermittent echo, disappears 
>>within about 30 secs of the call starting).
> 
> 
> Many thanks to those who replied. General consensus seems to be switching to
> mISDN or CAPI won't solve the intermittent echo problem. A follow-up with
> some more config information:
> 
> Zaptel.conf
> span=1,1,3,ccs,ami
> bchan=1-2
> dchan=3
> span=2,1,3,ccs,ami
> bchan=4-5
> dchan=6
> loadzone=uk
> defaultzone=uk
> 
> Zapata.conf:
> [channels]
> language = en
> 
> pridialplan = dynamic
> nationalprefix = 0
> internationalprefix = 00
> 
> switchtype = euroisdn
> signalling=bri_cpe_ptmp
> group=1
> context=isdn
> channel => 1-2
> 
> switchtype = euroisdn
> signalling=bri_cpe_ptmp
> group=2
> context=isdn
> channel => 4-5
> 
> echocancel=yes
> echocancelwhenbridged=yes
> echotraining=no
> ;echotraining=800
> rxgain=0.0
> txgain=0.0
> immediate=yes
> 
> I've tried echotraining off, on, 100, 400 and 800, none of which seem to
> help matters very much. Any suggestions for getting rid of echo on these
> lines would be gratefully appreciated.
> 
> Regards,
> 
> Chris