SIP Privacy

	WARNING: the information on this page might be incomplete or inacurate

Supported Standards

• draft-ietf-sip-privacy-04.txt for support of Remote-Party-ID.
• RFC3323 A Privacy Mechanism for the Session Initiation Protocol (SIP)¹
• RFC3325 Private Extensions to the Session Initiation Protocol (SIP) for Asserted Identity within Trusted Networks²
• ITU Q.1912.5 Interworking between SIP and BICC/ISUP

[1] Partial support. Support Section 4.1. Constructing Private Messages
[2] Partial support. Doesn't support P-Preferred-Identity.

Acronyms

RPID	Remode-Party-ID header
PAID	P-Asserted-Identity header
CLI	Calling Party Number (ISUP or ISDN)
GN	Generic Number for additional calling party number (ISUP ITU)
APRI	Address Presentation Restricted Indicator (ISUP) or Presentation indicator (ISDN)
SI	Screening Idicator (ISUP or ISDN)
{param}	Scripting call parameters

Script call parameter privacy mapping

ISUP/ISDN

SS7 param	CLI digits	CLI APRI	CLI SI	GN digits	GN APRI	GN SI
Routing script param	{calling}	{calling_presentation}	{calling_screening}	not mapped	not mapped	not mapped

The CLI APRI is mapped according to the following table.

{calling_presentation} to ISUP/ISDN
{calling_presentation}	CLI APRI
"not_available"	Address/Number not available
"restricted", "addr_restricted", "name_restricted"	Presentation Restricted
"unspecified", "allowed"	Presentation Allowed

ISUP/ISDN to {calling_presentation}
CLI APRI	{calling_presentation}
Address/Number not available	"not_available"
Presentation Restricted	"restricted"
Presentation Allowed	"allowed"
Other value	"unspecified"

The CLI SI is mapped according to the following table.

{calling_screening} to/from ISUP/ISDN
{calling_screening}	CLI SI
"pass"	User provided, verified and passed
"fail"	User provided, verified and failed
"no"	User provided, not screened/verified
"network_provided"	Network Provided

---

SIP 'Remode-Party-ID' header

The Remote-Party-ID header field is defined as:

Remote-Party-ID: "display-name" <address-spec>;rpi-pty-type;rpi-privacy;rpi-screen

RPID URI

The RPID URI display-name is filled from {private_display}.
The RPID URI address-spec is filled from {calling}.

RPID rpi-screen param

The RPID rpi-screen param is filled according to the following table.

{calling_screening} to SIP
{calling_screening}	RPID rpi-screen param
"unspecified", "pass", "network_provided"	screen=yes
"fail", "no"	screen=no

SIP to {calling_screening}
RPID rpi-screen param	{calling_screening}
screen=yes	"pass"
screen=no	"no"
no screen param	"unspecified"

RPID rpi-privacy param

The RPID rpi-privacy param is filled according to the following table.

{calling_presentation} to SIP
{calling_presentation}	RPID rpi-privacy param
"unspecified", "not_available", "allowed"	privacy=off
"restricted"	privacy=full
"addr_restricted"	privacy=uri
"name_restricted""	privacy=name

SIP to {calling_presentation}
RPID rpi-privacy param	{calling_presentation}
privacy=off	"allowed"
privacy=full	"restricted"
privacy=uri	"addr_restricted"
privacy=name	"name_restricted""
no privacy param	"unspecified""

RPID rpi-pty-type param

The RPID rpi-pty-type param is harcoded to:

party=calling

---

SIP 'P-Asserted-Identity' and 'Privacy' headers

The P-Asserted-Identity and Privacy header field are defined as:

P-Asserted-Identity: "display-name" <address-spec>
Privacy: priv-value

PAID URI

The PAID URI display-name is filled from {private_display}.
The PAID URI address-spec is filled from {calling}.

"Privacy" header

The "Privacy" header is filled according to the following table.

{calling_presentation} to SIP
{calling_presentation}	Privacy header
"unspecified", "not_available", "allowed"	privacy="off"
"restricted"	privacy="full"
"addr_restricted"	privacy="uri"
"name_restricted""	privacy="name"