<div>
Hi,<br />
<br />
The 8845 and 8865 are not compatible with CUCM 10.5.1, you need to upgrade to 10.5.2 or 11.0 and later.<br />
<br />
Have a look for compatibility on:<br />
<br />
<a href="http://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phone-8800-series/datasheet-c78-734730.html" rel="ugc">Cisco IP Phone 8845 Data Sheet</a><br />
<br />
<a href="http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/compat/matrix/CMDP_BK_CCBDA741_00_cucm-device-package-compatibility-matrix/CMDP_BK_CCBDA741_00_cucm-device-package-compatibility-matrix_chapter_00.html" rel="ugc">Cisco Unified Communications Manager Device Package Compatibility Matrix</a><br />
<br />
<a href="http://www.cisco.com/web/software/282074299/116495/cmterm-devicepack10.5.1_11008-1_Release_Notes.pdf" rel="ugc">Cisco Unified Communications Manager Device Package 10.5(1)(11008-1) Release Notes</a><br />
<br />
There is similar post on Cisco Support Community:<br />
<br />
<a href="https://supportforums.cisco.com/discussion/12588271/support-ip-phone-8845-cucm-1051" rel="ugc">Support Ip phone 8845 with cucm 10.5.1</a><br />
<br />
Best Regards.<br />
<br />
Salah
</div>


Hi,

The 8845 and 8865 are not compatible with CUCM 10.5.1, you need to upgrade to 10.5.2 or 11.0 and later.

Have a look for compatibility on:

Cisco IP Phone 8845 Data Sheet [http://www.cisco.com/c/en/us/products/collateral/collaboration-endpoints/unified-ip-phone-8800-series/datasheet-c78-734730.html]

Cisco Unified Communications Manager Device Package Compatibility Matrix [http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/compat/matrix/CMDP_BK_CCBDA741_00_cucm-device-package-compatibility-matrix/CMDP_BK_CCBDA741_00_cucm-device-package-compatibility-matrix_chapter_00.html]

Cisco Unified Communications Manager Device Package 10.5(1)(11008-1) Release Notes [http://www.cisco.com/web/software/282074299/116495/cmterm-devicepack10.5.1_11008-1_Release_Notes.pdf]

There is similar post on Cisco Support Community:

Support Ip phone 8845 with cucm 10.5.1 [https://supportforums.cisco.com/discussion/12588271/support-ip-phone-8845-cucm-1051]

Best Regards.

Salah

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I bought new phones and when I went to add them to call manager the option was not there for the new model. <br />
My call manager has the 8861, but not the 8865. <br />
<br />
here is the info about my call manager<br />
Cisco Unified CM Administration<br />
System version: 10.5.1.10000-7<br />
VMware Installation: 2 vCPU Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz, disk 1: 80Gbytes, 4096Mbytes RAM, Partitions aligned
</div>
</div>


I bought new phones and when I went to add them to call manager the option was not there for the new model. 
My call manager has the 8861, but not the 8865. 

here is the info about my call manager
Cisco Unified CM Administration
System version: 10.5.1.10000-7
VMware Installation: 2 vCPU Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz, disk 1: 80Gbytes, 4096Mbytes RAM, Partitions aligned

add 8865 phone support files to Call Manager

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.

IP Telephony

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).