Comments inline:
On 8 Jan 2005, at 22:02, Ian Chilton wrote:
Hi All,
I've got an MD3200 modem which is working as a Zaptel FXO interface for Asterisk (X100P clone I believe). It seems to work, but on incoming or outgoing calls I can hear the other party ok but when I speak, I hear my voice echo back at me (quite quietly but it's distracting!) on everything I say. The other party doesn't seem to hear the echo - they just say I sound a bit quiet.
Someone suggested I play with the rxgain and txgain but this didn't seem
to help. Is there anything I can do? - or is it a problem with my fxo
card or zaptel cards in general?
I'm running Asterisk 1.0.2-2 on Debain Linux (with zaptel 1.0.0-2) and i've got the modem connected to an NTL phone line in the UK. Here is my config's:
/etc/zaptel.conf:
Change fxsls to fxsks for the UK
fxsls=1 loadzone=uk defaultzone=uk
/etc/zapata.conf:
[channels] context=incoming_pstn
Also change fxsls here to fxsks
signalling=fxs_ls usecallerid=yes echocancel=yes echocancelwhenbridged=yes echotraining=yes rxgain=0.0 txgain=0.0
I find rxgain=2.0, txgain=2.0 to be the sweet spots for my UK setup. The aim is to get the monitor bars in ztmonitor to be at about half way when talking.
channel => 1
--Snip--
Please also note that the X100/1P cards are not suitable for use in the UK. They work on the American systems where the impedance is different to the UK. Google for more info.
You may find that asterisk reports the Zap channel as being in a strange ringing state: Add busydetect=no callprogress=no to solve this (I found that I could not get the devices to answer the line without these set: either on my BT line or NTL line.
Hope this helps,
Phil.
------------------------------------------------------------------------ --------------------------
Phil Quinney
IT Consultant - Any-Ideas
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