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upgrading sip to sccp
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To upgrade the Cisco phone firmware for a particular phone from SCCP to SIP, follow the steps in this task.

If Cisco Unified IP phones presently connected to Cisco Unified CME are using the SCCP protocol to receive and place calls and you now want some or all of these phones to use the SIP protocol, the phone firmware for each phone type must be upgraded from SCCP to the recommended SIP version before the phones can register. If Cisco Unified IP phones to be connected to Cisco Unified CME are brand new, out-of-the-box, the SCCP phone firmware preloaded at the factory must be upgraded to the recommended SIP version before your SIP phones can complete registration.


Cisco Unified IP Phone 7940Gs and Cisco Unified IP Phone 7960Gs—If these IP phones are already configured in Cisco Unified CME to use the SCCP protocol, the SCCP phone firmware on the phone must be version 5.x. If required, upgrade the SCCP phone firmware to 5.x before upgrading to SIP.


  1. enable
  2. configure terminal
  3. no ephone ephone-tag
  4. exit
  5. no ephone-dn dn-tag
  6. exit
  7. voice register global
  8. mode cme
  9. load phone-type firmware-file
  10. upgrade
  11. Repeat previous two steps.
  12. create profile
  13. file text
  14. end


The following example shows the configuration steps for converting firmware on an Cisco Unified IP phone already connected in Cisco Unified CME and using the SCCP protocol, from SCCP 5.x to SIP 7.4:

Router(config)# telephony-service
Router(config-telephony)# no create cnf
CNF files deleted
Router(config-telephony)# voice register global
Router(config-register-global)# mode cme
Router(config-register-global)# load 7960 P0S3-07-4-00
Router(config-register-global)# upgrade
Router(config-register-global)# create prof