[asterisk-users] Zap channel-modem/fax conn. problems

[Tamas Levente]

Hi,
I'd like to ask for help if there is a solution. I have already went
thru the archives, but nothing that'd solve my problem came up.
 
My problem is that since we changed to asterisk and voip phones at the
Co, using a zaptel tormenta2 dual T1 channel card, and an Adtran TA750
channelbank, we are experiencing problems with the cashing machine the
faxes and a modem. What I did is that these analog  lines just passing
thru asterisk like: 
[modem]
exten => _X.,1,Dial(Zap/35/${EXTEN})
with a little more tricky calculation of the Zap channel number. 
 
I don't see what could be changed in order to make things work again. As
disconnecting the T1 and having it going directly to the channel bank
fixes the things right away.
 
Here are the problems:
FAX: random sending errors
MODEM: while I was there trying manually it builds up connection 9600
bps or sometimes even 21kbps, but after that it has all sorts of
problems communicating
Cashing machine: random failure of building up the connection upon
payments
 
What I don't understand is, why do they fail? They are on the same card,
no codecs are used to transmit the data, and it is completely digital,
probably very low and constant delay on the path.
 
Is there a way to troubleshoot this issue? Or any device out there
available that can have one incoming T1 line and splits it into 2 full
T1-s having some of the timeslots coming out on one and some on the
other (for reasonable price that is:) )?
 
thx 
Levi
 


-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20060819/477afb3e/attachment.htm