[cisco-voip] ATA problems

[Vandy Hamidi]

Just injecting some ATA experience.

Cisco doesn't really like using it for Faxing.  Supposedly they aren't
the best (which is true).

Never the less, I had issues where 60+% of faxes through the ATA would
fail.  During troubleshooting we identified the faxes going through our
6608 blade on the 6500 where the ones failing.

Fix after days working with tac, lower the gain on the gateway
(attenuate by 3db) .  100% of faxes now succeed.

 

Just thought I would share that and hopefully save a lot of people some
time.

 

 

            -=Vandy=-

 

  _____  

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Vincent De
Keyzer
Sent: Monday, November 29, 2004 9:27 AM
To: cisco-voip at puck.nether.net
Subject: RE: [cisco-voip] ATA problems

 

Well, this seems to be the problem. When both fax machines are SuperG3,
transmission fails (while it succeeds when one of the two is not). 

 

But "make sure that the fax machine is trained down to 14.4bps or lower"
is my problem: have you been able to configure all of your several
hundreds of faxes to behave so?... Or did you do it in some other way?

 

Vincent

 

 

(...) finally you need to ensure that the fax machine does not attempt
to connect at a higher rate than 14.4bps.

 

(...) Last, make sure that the fax machine is trained down to 14.4bps or
lower.

 

Tim

 

 

 

  _____  

From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of Vincent De
Keyzer
Sent: Thursday, November 18, 2004 9:52 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] ATA problems

 

Hello,

 

we are using CCM to offer Centrex services to our customers.

 

Typically, each customer has a few phones + one ATA. Each customer is in
a different location across the city.

 

Now, one of my customers has problems with its ATA: transmission breaks
during the first page, or during some other of the pages - and sometimes
it just gets through fine. No pattern can be identified here.

 

Of course, I thought of slips on the GW, but the gateway is used by all
the customers, and no other customer complains about this.

 

A tech has been on site and tried to receive faxes on his laptop,
without success. So it's not the fax machine either.

 

Any ideas?

 

Vincent

 

 

 

 

 

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