asterisk users - Sep 2005 - R: Best drivers for HFC-S ISDN cards

Mine is very similar: i don't have echocancelwhenbridged=yes because it
seems work only on TDM, is it ?

And in Italy, I often have set pridialplan = unknown

About echo I have some problems, but only at the beginning of the call. After
3-4 seconds the echo became almost null, specially with snom 190; with pa168s
and ywh10 I have again some problem, the echo come up also after 1 minute of
conversation. The most strange think is that on older version of bristuff, with
same configuration files, I never had this problem.

Any suggestion? Specially for echo problem ?

Thanks all

Giordano Grandis
g.grandis@invidea.it
 
-----Messaggio originale-----
Da: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] Per conto di Chris Bagnall
Inviato: marted? 27 settembre 2005 12.07
A: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Oggetto: RE: [Asterisk-Users] Best drivers for HFC-S ISDN cards

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
-- 
C.M. Bagnall, Director, Minotaur I.T. Limited
Tel: (07010) 710715   Mobile: (07811) 332969   Skype: minotaur-uk
ICQ: 13350579   AIM: MinotaurUK   MSN: msn@minotaur.cc   Y!: Minotaur_Chris
This email is made from 100% recycled electrons


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Well done Tim...could u post here your Zapata.conf ?  :)

I'm in Italy and have some issues with echo....

Thanks

Giordano Grandis
g.grandis@invidea.it
 
-----Messaggio originale-----
Da: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] Per conto di Tim Robinson
Inviato: luned? 26 settembre 2005 22.30
A: Asterisk Users Mailing List - Non-Commercial Discussion
Oggetto: Re: [Asterisk-Users] Best drivers for HFC-S ISDN cards


Chris
I have only ever used zaphfc drivers and for me they are perfect.  Echo 
has never been a problem.  It would be helpful if you were to provide a 
bit more information to the group about your configuration so we can try 
and help you work out the cause.

Switching to capi or mISDN is unlikely to help and will almost certainly 
be a retrograde step as far as I hear from these forums.

Best regards
Tim Robinson
Basingstoke, UK

Chris Bagnall wrote:
> It seems that HFC-S cards can be connected with asterisk in a few different
> ways - isdn4linux, mISDN, chan_capi or zaphfc. I've tried isdn4linux
(severe
> echo, reproducable on every inbound call) and zaphfc (intermittent echo,
> disappears within about 30 secs of the call starting).
> 
> What's the recommended way to hook up these ISDN cards? Is switching to
capi
> or mISDN likely to remove the echo problem completely, or is this one of
> those things one has to accept?
> 
> Thanks in advance.
> 
> Regards,
> 
> Chris
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