H.323-SIP Source Call Address Passthrough

For FCC auditing requirements, the Oracle® Enterprise Session Border Controller (E-SBC) can provide the originating IP address of endpoints using the Video Relay Service (VRS) service.

Because the FCC also requires h.323 for all calls between VRS vendors, the E-SBC passes the IP address and port information in the h.225 sourceCallSignalAddress through the h.323 Inter-working Function (IWF) function. You can extract the information from a SIP header parameter in the SIP message. You can use any SIP header parameter.

The SIP INVITE message includes a new header type called h225SourceCallSignalAddress. For example:

INVITE sip:1000@192.168.38.2:5060 SIP/2.0
Via: SIP/2.0/UDP 192.168.38.0:5060;branch=z9hG4bK55gtsj3018lfr5etc7e1.1
Contact: "2000"<sip:2000@192.168.38.0:5060;transport=udp>
Supported: 100rel
From: "2000"<sip:2000@192.168.38.0:5060>;tag=5435c12f000e2e7b
To: <sip:1000@192.168.38.2:5060>
Call-ID: 00000100007f13ce5435c12f000ddcc4@127.0.0.1
h225SourceCallSignalAddress: 172.16.38.5:10005   <--New header type.
CSeq: 2 INVITE
Content-Length: 126
Content-Type: application/sdp
Max-Forwards: 70

v=0
o=IWF 1 1 IN IP4 192.168.38.0
s=H323 Call
c=IN IP4 192.168.38.0
t=0 0
m=audio 10000 RTP/AVP 0
a=rtpmap:0 PCMU/8000

You must enable and configure the h225SourceCallSignalAddress parameter on the E-SBC to perform IWF operations. You can enable and configure this parameter from the ACLI command line or from the Web GUI in Expert mode.