[cisco-voip] What's the pro and con for ATA, compared to FXS

[Jeff Ruttman]

How do you disable an unused port on an ATA?
 
I don't know that we've experienced calls dropping, but you are right
that an unused port does try to connect to CM and at the least generates
lots of fails in the event logs.  I go ahead and add the second port
into CM, so it can register, and I just don't configure a line on it.
This stops the error messages and perhaps stops calls dropping as you
describe.
 
I only have experience with ATAs and largely they've been OK.  Most
problems have been fixed by using 9600 or 14400 baud rates on fax
machines, and I think we also had to disable Super G3 on a couple newer
fax/copiers.
 
Thanks
jeff

________________________________

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of polo person
Sent: Tuesday, May 11, 2010 3:54 AM
To: junks2you at gmail.com; cisco-voip at puck.nether.net
Subject: Re: [cisco-voip] What's the pro and con for ATA, compared to
FXS


My experience of ATA's and faxes is not good. We have a combination of
faxes + VG224 and faxes + ATA and I only seem to get problems with the
ATA's. Quite often they will get their knickers in a twist and stop
giving dial tone, and a power off / on sorts them out and they will then
work again for a few months. Other times I get problems with fax
transmission, ranging from failed sending / receiving to a fax being
sent and received ok, but the sending fax machine reports it didn't get
delivered so it proceeds to send it again...and again...and  again...
(very frustrating for the recipient!) The solution to this one was to
drop the speed of fax transmission down to 14400 and this cured the
problem.
 
One thing to be wary of is that if the second ATA port is not being
used, you must disable it. If you don't you will get calls dropping as
the ATA will reset occasionally when the second port tries to talk to
the CM, but as it isnt configured it doesent get very far. If a call is
in progress on port 1 at the time it will get dropped.
 
Faxes on our VG224's seem to work on the main with very few problems
(mostly fax passthrough, some fax relay).  We have CM
6.1.3.something_odd..... and are en-route to CM7 them CM8 over the
course of this year. 
 
Cheers
 
Simon
 

________________________________

Date: Tue, 11 May 2010 15:59:15 +0800
From: junks2you at gmail.com
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] What's the pro and con for ATA, compared to FXS

Hi Guys,

Can anyone explain to me what the pros and cons of ATA? We got both FXS
and ATA 186 for FAXing in a call manager 7 controled environment.

Regards,

Charlie


________________________________

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