SRST phone registration procedure uses the translation pattern in transformation mask how phone get registered.![Capture52.JPG Capture52.JPG](https://community.cisco.com/t5/image/serverpage/image-id/100136iD542E60AE4E5D414/image-size/large?v=v2&px=999)
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sccp local FastEthernet0/0
sccp ccm 10.4.13.20 identifier 10
sccp ccm 10.4.13.70 identifier 12
sccp ccm 172.16.10.40 identifier 30
sccp
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sccp ccm group 1
associate ccm 10 priority 1
associate ccm 12 priority 2
associate ccm 30 priority 3
switchback method graceful
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