[cisco-voip] No SDP in INVITE to basic SIP endpoint.

[Robert Kulagowski]

I'm evaluating a SIP paging server from Cyberdata.  I've configured it per 
the docs, 
(http://www.cyberdata.net/support/server/documentation/930280A_VoIP_Ceiling_Speaker_Cisco_Call_Manager_Server_Setup_Guide.pdf) 
and the paging server registers with CM.  However, when I call the DN, the 
caller hears a ring, then error.

 From the captures and from the support folks at Cyberdata, there's no SDP 
information in the INVITE.

SIP endpoints are new to me, so any clues on where to start looking?
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