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"SIP Trunks disallows REGISTER"

This is the 405 SIP Message we get from ccm 5 if we try to register a phone behind a trunk ie whose ip address is also the ip address of a trunk set in the pbx.

Is it possible to change that ?

Is there a smart trick for that ?

Thanks a lot in advance.

David

1 REPLY
Silver

Re: "SIP Trunks disallows REGISTER"

Because third-party SIP phones do not send a MAC address, they must identify themselves by using digest authentication.

The REGISTER message includes the following header:

Authorization: Digest username="swhite",realm="ccmsipline",nonce="GBauADss2qoWr6k9y3hGGVDAqnLfoLk5",uri="sip:172.18.197.224",algorithm=MD5,response="126c0643a4923359ab59d4f53494552e"

The username, swhite, must match an end user that is configured in the End User Configuration window of Cisco Unified CallManager Administration (see Adding an End User in the Cisco Unified CallManager Administration Guide, Release 5.0(4)). The administrator configures the SIP third-party phone with the user; for example, swhite, in the Digest User field of Phone Configuration window (see Configuring Cisco Unified IP Phones, in the Cisco Unified CallManager Administration Guide, Release 5.0(4)).

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