Version 5.2 119 September 2007
SIP User's Manual 5. Web-based Management
Notes:
• Several rows with the same NPI-TON or Phone-Context are allowed. In
such a scenario, a Tel-to-IP call uses the first match.
• Phone-Context '+' is a unique case as it doesn't appear in the Request-
URI as a Phone-Context parameter. Instead, it's added as a prefix to the
phone number. The '+' isn't removed from the phone number in the IP-to-
Tel direction.
Table 5-18: Phone-Context Parameters
Parameter Description
Add Phone Context As Prefix
[AddPhoneContextAsPrefix]
Determines whether or not the received Phone-Context parameter is
added as a prefix to the outgoing ISDN SETUP Called and Calling
numbers.
Valid options include:
 [0] Disable = Disable (default).
 [1] Enable = Enable.
NPI
Select the Number Plan assigned to this entry.
You can select the following:
 [0] Unknown = Unknown (default)
 [1] E.164 Public = E.164 Public
 [9] Private = Private
For a detailed list of the available NPI/TON values, refer to Numbering
Plans and Type of Number on page 117.
TON
Select the Number Type assigned to this entry.
 If you selected Unknown as the NPI, you can select Unknown [0].
 If you selected Private as the NPI, you can select Unknown [0],
Level 2 Regional [1], Level 1 Regional [2], PSTN Specific [3], or
Level 0 Regional (Local) [4].
 If you selected E.164 Public as the NPI, you can select Unknown
[0], International [1], National [2], Network Specific [3], Subscriber
[4], or Abbreviated [6].
Phone Context
The Phone-Context SIP URI parameter.
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