Hmm.. I'm not sure what that is about.. Maybe it is NAT'ng.

I changed the IP of the device to 10.1.1.5. Set up the port it is plugged into to be on the Voice VLAN. Same thing:

Received:

REGISTER sip:10.1.1.1:5060 SIP/2.0

Via: SIP/2.0/UDP 10.1.1.5:5060;rport;branch=z9hG4bK1411286857

From: <407>;tag=385332712

To: <407>

Call-ID: 335855849@10.1.1.5

CSeq: 1 REGISTER

Contact: <407>

Max-Forwards: 5

User-Agent: CyberData Intercom

Expires: 3600

Content-Length: 0

Jan 15 22:34:04.470: //-1/xxxxxxxxxxxx/SIP/Error/ccsip_reg_search_call_id_table: No entry found in sipCallID Table

Jan 15 22:34:04.470: //-1/xxxxxxxxxxxx/SIP/Error/sipSPI_validate_own_ip_addr: ReqLine IP addr does not match with host IP addr

Jan 15 22:34:04.470: //227/72C276DF81AE/SIP/Error/ccsip_spi_register_incoming_registration: Registration Authorization failed with authorization header=

Jan 15 22:34:04.470: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:

Sent:

SIP/2.0 100 Trying

Via: SIP/2.0/UDP 10.1.1.5:5060;rport;branch=z9hG4bK1411286857

From: <407>;tag=385332712

To: <407>

Date: Thu, 15 Jan 2009 22:34:04 GMT

Call-ID: 335855849@10.1.1.5

Server: Cisco-SIPGateway/IOS-12.x

CSeq: 1 REGISTER

Content-Length: 0

Jan 15 22:34:04.470: //-1/xxxxxxxxxxxx/SIP/Msg/ccsipDisplayMsg:

Sent:

SIP/2.0 401 Unauthorized

Via: SIP/2.0/UDP 10.1.1.5:5060;rport;branch=z9hG4bK1411286857

From: <407>;tag=385332712

To: <407>;tag=50890E8-7F7

Date: Thu, 15 Jan 2009 22:34:04 GMT

Call-ID: 335855849@10.1.1.5

Server: Cisco-SIPGateway/IOS-12.x

CSeq: 1 REGISTER

A couple of things to be aware of:

-SIP CME will only allow devices to register without authentication on the same subnet

-If the device is on a different subnet, you must put a 'username password ' on the voice register pool configuration.

-SIP CME doesn't officially support 3rd party devices, but a majority of devices will work anyways

-Paolo is actually incorrect on the IP address. The Via header will be used to direct the SIP packets, and this is normal behavior.

Here is a registration example for a 3951:

Received:

REGISTER sip:172.18.110.80 SIP/2.0

From: <1020>;tag=6oEvX1-gy

To: <1020>

Call-ID: EP0-lG4QesZjBD@172.18.110.80

CSeq: 187 REGISTER

Via: SIP/2.0/UDP 14.50.233.55:5060;branch=z9hG4bKwokBD-MA5lTcsJ1

Contact: <1020>;+sip.instance="";+u.sip!model.ccm.cisco.com="412"

Max-Forwards: 70

Authorization: Digest username="a",realm="",uri="sip:172.18.110.80",response="ea67ab428023c52b7d9329b2a401d2f1",algorithm=MD5,nonce="4667E6D30003ED8E",qop=auth,cnonce="94de76c0",nc=000000aa

User-Agent: Cisco-CP3951/8.1

Expires: 0

Supported: 100rel, replaces, norefersub, X-cisco-callinfo, X-cisco-service-control

Content-Length: 0

Sent:

SIP/2.0 100 Trying

Date: Fri, 16 Jan 2009 00:09:45 GMT

From: <1020>;tag=6oEvX1-gy

Content-Length: 0

To: <1020>

Call-ID: EP0-lG4QesZjBD@172.18.110.80

Via: SIP/2.0/UDP 14.50.233.55:5060;branch=z9hG4bKwokBD-MA5lTcsJ1

Server: Cisco-SIPGateway/IOS-12.x

CSeq: 187 REGISTER

Sent:

SIP/2.0 200 OK

Date: Fri, 16 Jan 2009 00:09:45 GMT

From: <1020>;tag=6oEvX1-gy

Content-Length: 0

To: <1020>;tag=244640CC-8FE

Contact: <1020>;expires=0

Expires: 0

Call-ID: EP0-lG4QesZjBD@172.18.110.80

Via: SIP/2.0/UDP 14.50.233.55:5060;branch=z9hG4bKwokBD-MA5lTcsJ1

Server: Cisco-SIPGateway/IOS-12.x

CSeq: 187 REGISTER

hth,

nick

I got it to work! I added the realm paramater to voice global and it works great now. Thanks!

Nick is correct, I was confused. After the unauthorized message, an authenticating phone is supposed to try again again with the credentials. So the error messassages are actually misleading in this case.