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174 Dialogic
®
Global Call IP Technology Guide — November 2007
Dialogic Corporation
IP-Specific Operations
Diversion
(URI separately
accessible via field-
specific parameter)
INVITE gc_SetUserInfo( ) / gc_MakeCall( )
INFO, NOTIFY, SUBSCRIBE gc_Extension( )
Event NOTIFY, SUBSCRIBE gc_Extension( )
Expires SUBSCRIBE gc_Extension( )
From
(display string
separately accessible
via field-specific
parameter)
INVITE gc_SetUserInfo( ) / gc_MakeCall( )
INFO, NOTIFY, SUBSCRIBE gc_Extension( )
OPTIONS gc_Extension( ) if E_SIP_OPTIONS_Access is
enabled
REFER gc_SetUserInfo( ) / gc_InvokeXfer( ) if call
transfer is enabled
REGISTER gc_ReqService( )
Refer-To REFER gc_SetUserInfo( ) / gc_InvokeXfer( ) if call
transfer is enabled
Referred-By INVITE gc_SetUserInfo( ) / gc_MakeCall( )
REFER gc_SetUserInfo( ) / gc_InvokeXfer( ) if call
transfer is enabled
Replaces INVITE gc_SetUserInfo( ) / gc_MakeCall( )
REFER gc_SetUserInfo( ) / gc_InvokeXfer( ) if call
transfer is enabled
Request-URI INVITE gc_SetUserInfo( ) / gc_MakeCall( )
INFO, NOTIFY, SUBSCRIBE gc_Extension( )
OPTIONS gc_Extension( ) if E_SIP_OPTIONS_Access is
enabled
REFER gc_SetUserInfo( ) / gc_InvokeXfer( ) if call
transfer is enabled
REGISTER gc_ReqService( )
Require OPTIONS gc_Extension( ) if E_SIP_OPTIONS_Access is
enabled
REGISTER gc_ReqService( )
Supported OPTIONS gc_Extension( ) if E_SIP_OPTIONS_Access is
enabled
REGISTER gc_ReqService( )
Table 8. Common Header Fields in Outbound SIP Messages (Continued)
SIP header field SIP message Global Call function to set / send message
‡ From and To header fields are not set in INVITE messages using SIP message information parameters.