SIP User's Manual 128 Document #: LTRT-65412
MP-11x & MP-124
Parameter Description
Allowed = sends Caller ID information when a call is made using
these destination / source prefixes.
Restricted = restricts Caller ID information for these prefixes.
Notes:
Only applicable to Number Manipulation tables for Tel-to-IP
source number manipulation.
If 'Presentation' is set to 'Restricted' and 'Asserted Identity Mode'
is set to 'P-Asserted', the From header in the INVITE message
includes the following: From: 'anonymous' <sip:
anonymous@anonymous.invalid> and 'privacy: id' header.
3.3.4.7.2 Mapping NPI/TON to SIP Phone-Context
The 'Phone-Context Table' page is used to map Numbering Plan Indication (NPI) and Type
of Number (TON) to the SIP Phone-Context parameter. When a call is received from the
Tel, the NPI and TON are compared against the table and the matching Phone-Context
value is used in the outgoing SIP INVITE message. The same mapping occurs when an
INVITE with a Phone-Context attribute is received. The Phone-Context parameter appears
in the standard SIP headers where a phone number is used (Request-URI, To, From,
Diversion).
For example, for a Tel-to-IP call with NPI/TON set as E164 National (values 1/2), the device
sends the outgoing SIP INVITE URI with the following settings: “sip:12365432;phone-
context= na.e.164.nt.com“. This is configured for entry 3 in the figure below. In the opposite
direction (IP-to-Tel call), if the incoming INVITE contains this Phone-Context (e.g. "phone-
context= na.e.164.nt.com"), the NPI/TON of the called number in the outgoing SETUP
message is changed to E164 National.
¾ To configure the Phone-Context tables:
1. Open the 'Phone Context Table' page (Configuration tab > Protocol Configuration
menu > Manipulation Tables submenu > Phone Context Table page item).
Figure 3-75: Phone Context Table Page
2. Configure the Phone Context table according to the table below.
3. Click the Submit button to save your changes.
4. To save the changes to flash memory, refer to ''Saving Configuration'' on page 167.
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