====== Auto Registration ======
{{cucm-areg1.png|}}
  - If TFTP server does not contain IP phone configuration file (.e.g., SEP0015C5AABBDD.cnf.xml), the TFTP server returns "Read Error" to the IP Phone
  - IP phone will then download XmlDefault.cnf.xml from the TFTP server.
  - IP phone will update its firmware based on the phone load information defined in the configuration file.
  - IP phone will then register to the CUCM server configured for auto registration defined in XmlDefault.cnf.xml.
  - CUCM will automatically create a phone device record in the database and assign a DN from the configured auto registration range to the first line of the device and then create the configuration file (SEP0015C5AABBDD.cnf.xml).
  - IP phone will then download the configuration file (SEP0015C5AABBDD.cnf.xml) and register to the CUCM.

===== Configuration =====

==== Enterprise Parameters ====
  * Verify (or change) the autoregistration phone protocol.
  * Restart all the services? for this setting to take effect.
{{cucm-areg2.png|}}

==== CUCM Group ====
  * Ensure the autoregistration is enabled on one CUCM Group.
  * Only one group can be enabled at a time. Enabling one group will automatically disabled any other group that was previously enabled.
{{cucm-areg3.png|}}

==== CUCM Server ====
  * For each CUCM in the CUCM Group, enable or disable autoregistration and, if enabled configure a range of DNs to be assigned.
{{cucm-areg4.png|}}

  * Manual reconfiguration or CUCM BAT may be used to personalize autoregistered devices.