I would like to use the Cisco ATA 186 as a SIP device with Cisco Call Manager 7. However, I have found that the SIP firmware for the Cisco ATA 186 is unsupported by Call Manager 7.
Therefore, In order to use the ATA as a SIP device with the Call Manager, I believe I will need setup the ATA as a 3rd Party SIP device by doing the following:
1. Disable the TFTP option within the ATA, so that the SIP firmware is not overwritten by firmware from the TFTP server.
2. Install the 3.2.1 SIP firmware on the ATA, since the ATA is currently running the 3.2.4 SCCP firmware.
3. Register the ATA, as a third-party SIP device, with the Call Manager .
Can anyone comment on these steps? Am I missing any? Should I register the ATA as a 3rd party device?
Any feedback is appreciated