The following is an example SIP INVITE message with the minimum number of SIP headers required by ClearIP. ClearIP will accept a SIP INVITE in any format, with no limit on additional headers and the SDP (Session Description Protocol) information.
Phone numbers must be sent using E164 format with or without the ‘+’ (14045266060 or +14045266060). If numbers are sent with the leading ‘+’, then ClearIP Number Translation Rules must be configured to strip the ‘+’ for internal processing.
Example Accepted SIP INVITE Formats:
INVITE sip:+18001234567@outbound.sip.clearip.com:5060 SIP/2.0
Via: SIP/2.0/TCP outbound.sip.clearip.com:5060
From: <sip:+14045266060@5.6.7.8:5060>;tag=123456789
To: <sip:+18001234567@1.2.3.4:5060>
Call-ID: 1-12345@5.6.7.8
CSeq: 1 INVITE
Max-Forwards: 70
Content-Length: 0
INVITE sip:18001234567@outbound.sip.clearip.com:5060 SIP/2.0
Via: SIP/2.0/TCP outbound.sip.clearip.com:5060
From: <sip:14045266060@5.6.7.8:5060>;tag=123456789
To: <sip:18001234567@1.2.3.4:5060>
Call-ID: 1-12345@5.6.7.8
CSeq: 1 INVITE
Max-Forwards: 70
Content-Length: 0
Internationals numbers must come in E164 as well (+306946178085) but international dialing code prefixes such as 011 are acceptable (011306946178085). If international numbers are sent with the leading ‘+’ or 011, then ClearIP Number Translation Rules must be configured to strip the ‘+’ or 011 for internal processing.
Example Accepted SIP INVITE Formats:
INVITE sip:+306946178085@outbound.sip.clearip.com SIP/2.0
Via: SIP/2.0/TCP outbound.sip.clearip.com:5060
Call-ID: 1-12345@5.6.7.8
CSeq: 1 INVITE
From: <sip:+14045266060@5.6.7.8:5060>;tag=123456789
To: <sip:+306946178085@1.2.3.4:5060>
Max-Forwards: 70
Content-Length: 0
INVITE sip:011306946178085@outbound.sip.clearip.com SIP/2.0
Via: SIP/2.0/TCP outbound.sip.clearip.com:5060
Call-ID: 1-12345@5.6.7.8
CSeq: 1 INVITE
From: <sip:14045266060@5.6.7.8:5060>;tag=123456789
To: <sip:011306946178085@1.2.3.4:5060>
Max-Forwards: 70
Content-Length: 0