ATA 190 > Device Protocol SIP

[chuck47172]

I have a ton of ATA 190's in production on CUCM System version: 10.5.2.12901-1.

These devices constantly become unregistered and have to be reset before they will work again.

I use these for fax machines.

Any idea what causes this?

If you are only connecting one fax machine, does it matter if you use phone 1 or phone 2 port?

[chuck47172]

Also want to mention, the ATA 190 Software Version: 1.2.2(003) Hardware Version: 1.1.1

[Vaijanath Sonvane]

Hi,

Do you have these endpoints over the WAN or local to the CUCM network? I do see lot of software bugs related to unregistration for ATA190. Below are some for your reference:

CSCvp09761

CSCvk29369

CSCut09456

CSCvi29663

Have you tried software version 1.2(2)SR1? 

[chuck47172]

We have both WAN & local. I have not tried any other software versions. Is 1.2(2)SR1 newer than 1.2.2(003)?

Also, what is the procedure for upgrading the software?

[Vaijanath Sonvane]

Yes, 1.2(2)SR1 is newer version. You need to upload firmware files on CUCM TFTP servers and restart the TFTP Service. The ATA’s will download new firmware automatically.

[chuck47172]

Is there a way to upgrade just one ATA so we can test before rolling it out to all in production?

[Vaijanath Sonvane]

Yes, you can upgrade it individually. You can follow below procedure which is applicable to ATA’s as well:

https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-callmanager/213288-upgrade-ip-phone-firmware-individually.html