Cisco 7911 not registering

I have couple of cisco 7911 and I can’t get them to register to my pbx box. I don’t see any attempts in asterisk cli. I have installed SIP11.9-3-1SR1-1S firmware.
I get this in log
5:15:34p SEP001F9E2554xx CP-7911G SW PORT 1 0 1 1 0 0 4095 -1 13499986988651349997334679 14 Sent:REGISTER sip: SIP/2.0 Cseq:103 REGISTER CallId:[email protected]
Any pointers on how I can get the phones to register with free pbx?

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