If Cisco Unified IP phones presently connected to Cisco Unified CME are using the SIP protocol to receive and place calls and you now want some or all of these phones to use the SCCP protocol, the phone firmware for each phone type must be upgraded from SIP to SCCP before the phones can register.

Prerequisites
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 SIP protocol, the SIP phone firmware must be version 7.x.

Removing a SIP Configuration Profile
To remove the SIP configuration profile before downloading the SCCP phone firmware to convert a phone from SIP to SCCP, perform the steps in this task.

1. enable
   
2. configure terminal
   
3. no voice register pool pool-tag
   
4. end

Generating an SCCP XML Configuration File for Upgrading from SIP to SCCP
To create an ephone entry and generate a new SCCP XML configuration file for upgrading a particular
Cisco Unified IP phone in Cisco Unified CME from SIP to SCCP, perform the steps in this task.

1. enable
   
2. configure terminal
   
3. ephone-dn dn-tag
   
4. exit
   
5. tftp-server flash firmware-file
   
6. telephony service
   
7. load phone-type firmware-file
   
8. create cnf-files
   
9. end

Examples
The following example shows the configuration steps for upgrading firmware for a Cisco Unified IP Phone 7960G from SIP to SCCP. First the SIP firmware is upgraded to SIP 6.3 and from SIP 6.3 to SIP 7.4; then, the phone firmware is upgraded from SIP 7.4 to SCCP 7.2(3). The SIP configuration profile is deleted and a new ephone configuration profile is created for the Cisco Unified IP phone.

Router(config)# voice register global
Router(config-register-global)# mode cme
Router(config-register-global)# load 7960 P0S3-06-0-00
Router(config-register-global)# upgrade
Router(config-register-global)# load 7960 P0S3-07-4-00
Router(config-register-global)# exit
Router(config)# no voice register pool 1
Router(config-register-pool)# exit
Router(config)# voice register global
Router(config-register-global)# no upgrade
Router(config-register-global)# exit
Router(config)# ephone-dn 1
Router(config-ephone-dn)# exit
Router(config)# tftp-server flash:P00307020300.loads
Router(config)# tftp-server flash:P00307020300.sb2
Router(config)# tftp-server flash:P00307020300.sbn
Router(config)# tftp-server flash:P00307020300.bin
Router(config)# telephony service
Router(config-telephony)# load 7960-7940 P00307000100
Router(config-telephony)# create cnf-files