Specifies the precedence of presenting the SIP
header.
X ranges from 1 to 6.
0-FROM (Derives the name and number of the
caller from the ―From‖ header).
1-PAI (Derives the name and number of the
caller from the ―PAI‖ header. If the server does
not send the ―PAI‖ header, displays
―anonymity‖ on the callee’s phone).
2-PAI-FROM (Derives the name and number of
the caller from the ―PAI‖ header preferentially.
If the server does not send the ―PAI‖ header,
derives from the ―From‖ header).
3-RPID-PAI-FROM
4-PAI-RPID-FROM
5-RPID-FROM
Specifies the precedence of presenting the SIP
header.
X ranges from 1 to 6.
0-RPID-FROM (Derives the name and number
of the callee from the ―RPID‖ header