AudioCodes Mediapack mp-11x, Руководство пользователя

Страница: 363 / 390

Version 5.2 363 August 2007
SIP User's Manual 7. Telephony Capabilities
7.13.7.3 Caller ID on the IP Side
7.13.7.3.1 Overview
Caller ID is provided by the From header containing the caller's name and "number", for
example:
From: “David” <SIP:101@10.33.2.2>;tag=35dfsgasd45dg
If Caller ID is restricted (received from Tel or configured in the gateway), the From header
is set to:
From: “anonymous” <anonymous@anonymous.invalid>; tag=35dfsgasd45dg
The P-asserted (or P-preferred) headers are used to present the originating party’s caller
ID even when the caller ID is restricted. These headers are used together with the Privacy
header.
„ If Caller ID is restricted:
•
The From header is set to “anonymous” <anonymous@anonymous.invalid>
•
The ‘Privacy: id’ header is included
•
The P-Asserted-Identity (or P-preferred-Identity) header shows the caller ID
„ If Caller ID is allowed:
•
The From header shows the caller ID
•
The ‘Privacy: none’ header is included
•
The P-Asserted-Identity (or P-preferred-Identity) header shows the caller ID
In addition, the caller ID (and presentation) can be displayed in the Calling Remote-Party-
ID header.
7.13.7.3.2 Configuration
The ‘Caller Display Information’ table (CallerDisplayInfo) is used:
„ For FXS gateways: to define the caller ID (per port) that is sent to IP.
„ For FXO gateways: to define the caller ID (per port) that is sent to IP if caller ID isn’t
detected on the Tel side, or when EnableCallerID = 0.
„ For both FXS and FXO gateways: to determine the presentation of the caller ID
(allowed or restricted)
„ To maintain backward compatibility: when the strings ‘Private’ or ‘Anonymous’ are set
in the Caller ID/Name field, the caller ID is restricted and the value in the Presentation
field is ignored.
The value of the ‘Presentation’ field that is defined in the ‘Caller Display Information’ table
can be overridden by configuring the ‘Presentation’ parameter in the ‘Tel to IP Source
Number Manipulation’ table. Therefore, this table can be used to set the presentation for
specific calls according to Source / Destination prefixes.