ATA is taking the IP address and the TFTP address, and I have added this box as an ATA 186. But it not registering, and I am not able to view the ATA IP address in Call Manager. ie Either ATA is not able to contact with the Call Manager ot Call Manager is not accepting requests from this ATA.
From the version, we can see this is SIP base version of ATA. Is it possible to register this with Call Manager?
If not what all upgrades need to be done and in what method to register the same?
You need to upgrade to a SCCP image for the ATA to register as native phone on the CM.
The software can be downloaded on CCO if you have registered a support contract.
I thing is not enough to place the files on tftp directory (remember to update), so you need to manually prepare a file to force the updgrade. This is done with the 'ata tools' downloaded from the same firmware area.