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

[Giordano Grandis]

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 at invidea.it
 
-----Messaggio originale-----
Da: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] Per conto di Chris Bagnall
Inviato: martedì 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 at minotaur.cc   Y!: Minotaur_Chris
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