Sending an INVITE with isub and isub encoding SIP parameters in From Header and R-URI and To Header.
INVITE sip:service@10.10.1.162:5060;isub=12345;isub-encoding=nsap-ia5 SIP/2.0\r\n
Via: SIP/2.0/UDP 10.10.1.22:5061;branch=z9hG4bK-3936-1-0\r\n
From: sipp <sip:sipp@10.10.1.22:5061;isub=12345;isub-encoding=nsap-ia5>;tag=3936SIPpTag001\r\n
To: sut <sip:service@10.10.1.162:5060;isub=12345;isub-encoding=nsap-ia5>\r\n
The Outgoing ISDN with both calling party and called party subaddress.
08:25:18.600 CALL(ISD) (00:00034:01) RCVD Outseize Ctrl from L4
08:25:18.610 CALL(ISD) (00:00034:01) SENT Setup to Network
08:25:18.610 ISDN(I) 5845 02 T 00 00 1 28 22 0 02a SETUP 0009
08:25:18.610 ISDN(I) 02014450080200090504038090a21803a983896d07885031323334357003a12a2a710788503132333435