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

2005-09-26 Thread Stefan Tichy 
On Mon, Sep 26, 2005 at 02:23:04PM +0100, 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.

mISDN (kernel modules and user lib) is used by chan_misdn and
chan_capi. vISDN might be another option.


 I've tried isdn4linux (severe
 echo, reproducable on every inbound call) and zaphfc (intermittent echo,
 disappears within about 30 secs of the call starting).

There are some Audio Quality Tuning Options for zap channels.


 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?

chan_misdn, chan_capi (echosquelch) and vISDN include a very basic
echo cancellation or non echo cancellation. IMHO bristuff is the best
(least worse) choice. chan_modem/isdn4linux will cause additional
delay and will itensify the echo problem.


Do not use reply if you want to start a new thread. The header
In-Reply-To: is used by thread-aware mail clients even if the
subject has been changed.


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Stefan Tichy   [EMAIL PROTECTED]
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Re: [Asterisk-Users] Re: Best drivers for HFC-S ISDN cards

2005-09-26 Thread Vidar 
Can anyone get zaphfc to work with CVS HEAD? The version currently available 
from Junghans (f) is against CVS HEAD as of 2005-05-29 - it doesn't patch 
very well on the latest CVS HEAD.


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Vidar

- Original Message - 
From: Stefan Tichy [EMAIL PROTECTED]
To: 'Asterisk Users Mailing List - Non-Commercial Discussion' 
asterisk-users@lists.digium.com

Sent: Monday, September 26, 2005 4:54 PM
Subject: [Asterisk-Users] Re: Best drivers for HFC-S ISDN cards



On Mon, Sep 26, 2005 at 02:23:04PM +0100, 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.


mISDN (kernel modules and user lib) is used by chan_misdn and
chan_capi. vISDN might be another option.



I've tried isdn4linux (severe
echo, reproducable on every inbound call) and zaphfc (intermittent echo,
disappears within about 30 secs of the call starting).


There are some Audio Quality Tuning Options for zap channels.


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?


chan_misdn, chan_capi (echosquelch) and vISDN include a very basic
echo cancellation or non echo cancellation. IMHO bristuff is the best
(least worse) choice. chan_modem/isdn4linux will cause additional
delay and will itensify the echo problem.


Do not use reply if you want to start a new thread. The header
In-Reply-To: is used by thread-aware mail clients even if the
subject has been changed.


--
Stefan Tichy   [EMAIL PROTECTED]
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