The following table lists the latest Cisco IP Phone firmware versions supported for Cisco Unified Communications Manager 12.0.

As of Cisco Unified Communications Manager Firmware Release 12.0 and later, the following phones are not supported:

• Cisco Unified IP Phone 7970G

• Cisco Unified IP Phone 7971G-GE

• Cisco Unified Wireless IP Phone 7921G

As of Cisco Unified Communications Manager Firmware Release 11.5 and later, the following phones are not supported:

• Cisco IP Phone 12 SP+ and related models

• Cisco IP Phone 30 VIP and related models

• Cisco Unified IP Phone 7902

• Cisco Unified IP Phone 7905

• Cisco Unified IP Phone 7910

• Cisco Unified IP Phone 7910SW

• Cisco Unified IP Phone 7912

• Cisco Unified Wireless IP Phone 7920

• Cisco Unified IP Conference Station 7935

In Cisco Unified Communications Manager Release 12.0, you can use IPv6 to communicate with the phones that run Session Initiation Protocol (SIP) firmware.

Some of the Cisco IP Phones can run with Skinny Client Control Protocol (SCCP) firmware. The SCCP firmware does not support IPv6. The following desk phones can run with either SIP or SCCP firmware:

• Cisco Unified IP Phone 6901, 6911, 6921, 6941, 6945, and 6961

• Cisco Unified IP Phone 7906G, 7911G, 7931G, 7941G, 7941G-GE, 7942G, 7945G, 7961G, 7961G-GE, 7965G, 7962G, 7970G, 7971G-GE, and 7975G

• Cisco Unified IP Phone 8941 and 8945

If you set up your Cisco Unified Communications Manager to communicate in IPv6 only, any of above phones that have SCCP firmware installed must be upgraded to SIP firmware. The SCCP firmware cannot communicate with the Cisco Unified Communications Manager with IPv6.

The Cisco Wireless IP Phones 7925G, 7925G-EX, and 7926G are also SCCP phones. They do not have SIP firmware and only support IPv4.

For information about the IPv6-only network support with this release, see IPv6-only Network. For details on how to configure IPv6 in Cisco Unified Communications Manager, see the "Configure IPv6" chapter of the System Configuration Guide for Cisco Unified Communications Manager.

No new features were introduced for the Cisco Unified SIP Phone 3905.

No new features were introduced for the Cisco Unified IP Phones 6900 Series.

The following table lists the features added to the Cisco IP Phone 7800 Series for Firmware Releases 11.5(1)SR1 and 11.7(1). For more information, see the Release Notes at the following location: http://www.cisco.com/c/en/us/support/collaboration-endpoints/unified-ip-phone-7800-series/products-release-notes-list.html.

The Cisco IP Conference Phone 7832 enhances people-centric communications, combining superior high‑definition (HD) audio performance and 360-degree coverage for all sizes of conference rooms and executive offices. It provides an audiophile sound experience with a full-duplex two-way wideband (G.722) audio hands-free speaker. The phone is a simple solution that meets the challenges of the most diverse rooms.

The phone has sensitive microphones with 360-degree coverage. This coverage lets users speak in a normal voice and be heard clearly from up to 7 feet (2.1 m) away. The phone also features technology that resists interference from mobile phones and other wireless devices, assuring delivery of clear communications without distractions.

The initial release of the phone is Firmware Release 12.0. For more information, see the Release Notes at the following location:

https://www.cisco.com/c/en/us/support/collaboration-endpoints/unified-ip-phone-7800-series/products-release-notes-list.html

No new features were introduced for the Cisco Unified IP Phones 7900 Series.

No new features were introduced for the Cisco Unified Wireless IP Phone 7925G, 7925G-EX, and 7926G.

The following table lists the features added to the Cisco IP Phone 8800 Series for Firmware Releases 11.5(1)SR1 and 11.7(1). For more information, see the Release Notes at the following location: http://www.cisco.com/c/en/us/support/collaboration-endpoints/unified-ip-phone-8800-series/products-release-notes-list.html.

The Cisco Wireless IP Phone 8821 is an 802.11a/b/g/n/ac wireless device that uses SIP to provide voice communications across the IP network.

The phone provides voice communication over the same wireless LAN that your computer uses, allowing you to place and receive phone calls, put calls on hold, transfer calls, make conference calls, and so on. The phone has Ingress Protection 67 (IP67) level protection, which indicates dust-tight equipment that is protected against splashing water.

After the initial release of the phone with Firmware Release 11.0(2), the following table lists the features added to the phones for Firmware Release 11.0(3). Firmware Releases 11.0(2)SR1, 11.0(2)SR2, 11.0(3)SR1, and 11.0(3)SR2 did not introduce new features. For more information, see the Release Notes at the following location:

http://www.cisco.com/c/en/us/support/collaboration-endpoints/unified-ip-phone-8800-series/products-release-notes-list.html

The following table lists the features added to the Cisco Unified IP Conference Station 8831 for Firmware Release 10.3(1)SR3. For more information, see the Release Notes at the following location: http://www.cisco.com/c/en/us/support/collaboration-endpoints/unified-ip-phone-8800-series/products-release-notes-list.html.

The Cisco IP Conference Phone 8832 provides high‑definition (HD) audio performance and 360-degree coverage for medium to large conference rooms and executive offices. The conference phone has sensitive microphones that let you speak in a normal voice and be clearly heard from up to 10 feet (2.1 m) away.

The phone can be used for a 20 x 20 foot (6.1 x 6.1 m) room and up to 10 people. When you add the expansion microphones, coverage extends to a 20 x 34 foot (6.1 x 10 m) room and up to 22 people.

The initial release of the phone is Firmware Release 12.0. For more information, see the Release Notes at the following location:

http://www.cisco.com/c/en/us/support/collaboration-endpoints/unified-ip-phone-8800-series/products-release-notes-list.html

No new features were introduced for the Cisco Unified IP Phone 8941 and 8945.

No new features were introduced for the Cisco Unified IP Phone 8961, 9951, and 9971.

The following table lists the latest Cisco DX Series firmware versions supported for Cisco Unified Communications Manager 12.0.

The following table lists the features added to the Cisco DX Series for Firmware Release 10.2(5)SR2. There were no new features added for Firmware Releases 10.2(5)SR, 10.2(5)SR3, 10.2(5)SR4, or 10.5(2)ES. For more information, see the Release Notes at the following location: http://www.cisco.com/c/en/us/support/collaboration-endpoints/desktop-collaboration-experience-dx600-series/products-release-notes-list.html.