====== SIP Phones ======

===== Third Party SIP Phones =====
  * Basic phone support one line and consume three DL
  * Advanced phone support up to eight lines and video and consume six DL
  * The 7940 and 7960 can be loaded with a standard SIP software, which is different from using SIP with CUCM.
  * Features not supported included:
    * Phone button templates
    * Softkey templates
    * IP Phone Services
    * Cisco Unified Communication Manager Assistant
    * Cisco Unified Video Advantage
    * Call Pickup
    * Barge
    * Presence, etc  
  * Third party SIP phones register with CUCM but are not recognized by a device ID such as MAC. 
  * SIP Digest authentication is used instead.
    * By a username and keyed MD5 hash
    * CUCM can challenge SIP endpoints and trunks, but can only respond to challenges on SIP trunk
    * CUCM can be configured to check the key (i.e. digest credentials) of a username or to ignore the key and only search for the username
    * The Line are configured separately on the phone and CUCM and must match
{{cucm-sipph1.png|}}

===== Configuration Third Party SIP =====

==== CUCM End User ====
  * Configure and end user in CUCM

==== CUCM SIP Phone ====
  * Configure Third Party SIP phones and its DN in CUCM
    * Select type basic (1 line) of advanced (Up to 8 lines)
    * Use Dummy MAC
  * Associate SIP phone with the end user
{{cucm-sipph2.png|}}

==== Third-Party SIP Phone ====
  * Configure the SIP phone with the IP address of CUCM (proxy address), end-user ID, digest credentials/key hash (optional) and directory number
  * If digest credential is configured on the user, then we have to enter the password. See [[cucm-sip-dig|SIP Digest Authentication]] for more detail.
{{cucm-sipph3.png|}}

===== SIP Terminology =====
{{cucm-sipph4.png|}}