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.

You can't configure softkey templates for Video mode on the Cisco IP Phone 8800 Series phones. If a softkey appears on the phone, then it will not function correctly.

The following list contains a snapshot of severity 1, 2, and 3 caveats that are open for the Cisco IP Phone 8800 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.

• CSCvo74172 8861 phone should not roaming from WLC with Platinum QOS to WLC with Silver QOS

• CSCvo74172 8861 phone should not roaming from WLC with Platinum QOS to WLC with Silver QOS

• CSCvp34626 No wifi icon displayed at the upper right corner of LCD after wifi connection done

• CSCvq21512 8861 deregister when running JFW roaming about 3 hours(EAP-TLS with WPA2+ 11r over the DS)

• CSCvq32455 8845_65 ip phone reset/restart intermittently after disconnect of a call

• CSCvq37245 Active server shows empty under phone information page in ipv6 only mode

• CSCvq59064 802.11r fast transition sometimes failed to work on 8861

• CSCvq89463 8845/8865 freezing randomly

• CSCvt18121 8865 Phones video freezing on CMS in side-by-side view

• CSCvq32455 8845_65 ip phone reset/restart intermittently after disconnect of a call

• CSCvq37245 Active server shows empty under phone information page in ipv6 only mode

• CSCvq89463 8845/8865 freezing randomly

• CSCvt18121 8865 Phones video freezing on CMS in side-by-side view

The following list contains the snapshot of severity 1, 2, and 3 caveats that are resolved for the Cisco IP Phone 8800 Series that uses Firmware Release 14.0(1)SR2.

For more information about an individual caveat, you can access the online record for the caveat from the Bug Search Tool. 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 resolved at the time this report was compiled. For an updated view of resolved caveats or to view specific caveats, access the Bug Search Tool as described in View Caveats.

• CSCvx84332 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

• CSCvy11709 88xx HW rev 42 will not register fully over half-pair ethernet cable with a gigabit capable switch

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

• CSCvy35155 88x1 Media Server (ms) component crash during call

• CSCvx16077 Evaluation of IP Phone 8800 Series for Bluetooth_Pairing_Protocol_2021 vulnerabilities

• CSCvy67833 Evaluation of 88x1 for boot script replacement vulnerability

• CSCvx84332 Evaluation of 88x1/78x1/8832/7832 phone for OpenSSL March 2021 vulnerabilities

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

• CSCvx99688 8865 phone tagging Telepresence Call frames with DSCP CS4 as WMM UP 4 instead of WMM UP 5

• 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 SEP

• CSCvw45287 8851 phone over MRA phone stuck after loosing connectivity

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

• CSCvx16071 Evaluation of 88x5 for Bluetooth_Pairing_Protocol_2021 vulnerabilities

• CSCvy67824 Evaluation of 88x5 for boot script replacement vulnerability