The Cisco IP Phones 7841 hardware has been updated. The new hardware version is V18.

Phones manufactured with the new hardware updates must run Firmware Release 14.0(1)SR2 or later. The phone firmware does not allow the phone to be downgraded to releases earlier than Firmware Release 14.0(1)SR2.

Cisco 7811/7821/7861 IP Phones hardware has not been updated.

This feature has no user impact.

Anything that degrades network performance can affect phone audio and video quality, and in some cases, can cause a call to drop. Sources of network degradation can include, but are not limited to, the following activities:

• Administrative tasks, such as an internal port scan or security scan

• Attacks that occur on your network, such as a Denial of Service attack

When the Cisco Unified Communications Manager Transfer On-Hook Enabled field is enabled, users might report a problem with direct call transfer in SIP phones. If the user transfers the call and immediately goes on hook before they hear the ring signal, the call may drop instead of being transferred.

The user needs to hear the ring signal so that they can be sure that the call is being routed.

There is no localized Keyboard Alphanumeric Text Entry (KATE) support for the following Asian locales:

• Chinese (China)

• Chinese (Hong Kong)

• Chinese (Taiwan)

• Japanese (Japan)

• Korean (Korea Republic)

The default English (United States) KATE is presented to the user instead.

For example, the phone screen will show text in Korean, but the 2 key on the keypad will display a b c 2 A B C.

The following list contains severity 1, 2, and 3 caveats that are resolved for the Cisco IP Phone 7800 Series for Firmware Release 14.0(1)SR2.

For more information about an individual caveat, access the Bug Search Tool and search for the caveat using the Identifier. You must be a registered Cisco.com user to access this online information.

Because bug status continually changes, the list reflects a snapshot of the caveats that were open at the time this report was compiled. For an updated view of resolved caveats, access the Bug Tool as described in View Caveats.

• CSCvx84334 Evaluation of 88x1/78x1/8832/7832 phone for OpenSSL March 2021 vulnerabilities

• CSCvx85820 Evaluation of 88x1/78x1/7832/8832 for debugsh read file escape

• CSCvy27416 Voicemail button does not go to VM pilot with delayed PLAR enabled

• CSCvy15256 7841 Built-in bridge audio level output is lower than original call

• CSCvy15834 Disturbed sound after 30minutes on MRA IP phones for video callback from Webex

• CSCvy16927 8845/65 Phones Over MRA won't refresh Token after power cycle

• CSCvw30093 Cisco IP Phone 8800 Series, CDP packets ignored if switch hostname starts with SEPCS

• Cvw45287 8851 phone over MRA phone stuck after loosing connectivity

• CSCvy11282 88xx Download daemon may hang after configuration file download

• CSCvy67835 Evaluation of 7800 for boot script replacement vulnerability

The following list contains a snapshot of severity 1, 2, and 3 caveats that are open for the Cisco IP Phone 7800 Series for Firmware Release 14.0(1)SR2.

For more information about an individual bug, access the Bug Search Tool and search for the caveat using the Identifier. You must be a registered Cisco.com user to access this online information.

Because caveat status continually changes, the list reflects a snapshot of the caveats that were open at the time this report was compiled. For an updated view of open caveats, access the Bug Search Tool as described in View Caveats.

• CSCvs26183 78xx phone aux port upgrade 56x without headset need 22mins