3Com VCX V7122, User Manual, Page: 81 / 488

V7122 Gateway User Guide
81
International [1]
A public number in complete international E.164 format.
For example: 16135551234
National [2]
A public number in complete national E.164 format. For
example: 6135551234
Subscriber [4]
A public number in complete E.164 format representing
a local subscriber. For example: 5551234
Unknown [0]
A private number, but with no further information about
the numbering plan
Level 2 Regional [1]
Level 1 Regional [2] A private number with a location. For example: 3932200
PISN Specific [3]
Private [9]
Level 0 Regional (local) [4] A private local extension number. For example: 2200
For NI-2 and DMS-100 ISDN variants the valid combinations of TON and NPI for calling and
called numbers are (Plan/Type):
ƒ 0/0 - Unknown/Unknown
ƒ
1/1 - International number in ISDN/Telephony numbering plan
ƒ 1/2 - National number in ISDN/Telephony numbering plan
ƒ 1/4 - Subscriber (local) number in ISDN/Telephony numbering plan
ƒ 9/4 - Subscriber (local) number in Private numbering plan
Mapping NPI/TON to Phone-Context
The Phone-Context table is used to configure the mapping of NPI and TON to the Phone-
Context SIP parameter. When a call is received from the ISDN, the NPI and TON are
compared against the table and the 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).
To configure the Phone-Context tables:
1
Open the 'Phone Context Table' screen ( Protocol Management menu > Manipulation
Tables submenu > Phone Context Table option); the 'Phone Context Table' screen
appears, as shown below.