Hello svadmin,
If the 8851 phone came from factory with a firmware version 12, downgrading to firmware 10.3 might not be possible.
Some phone hardware revisions require certain minimum firmware versions. Minimum versions are usually found in a stic...
Hello Sirnet,
Cisco sells two types of 7821 phones, regular K9 phones and 3PCC (3rd party call control) or MP (multiplatform) models.
K9 Phones are meant to be used with Cisco CUCM only, but they can be configured to work with third party systems t...
Hello Will,
Any procedure to modify or alter an upgrade file to make it bootable that is not explicitly described as a supported procedure by Cisco official documentation is not supported.
It might work just fine, but Cisco and the TAC cannot guara...
Please remember that if you are using a SIP Trunk between CUCM and Avaya, the SIP must have the MTP Required option disabled.
Cisco DX650 should support most of the regular h264 and mp4 codecs for video calls.
Hello Gidonitzhak,
If the authentication failures appear at the Alternate Syslogs, you might want to create a custome SyslogStringMatchFound alert from RTMT.
You might want to check the following link:
https://supportforums.cisco.com/t5/ip-telephony...
