User`s manual

Mediant 2000 & TP-1610 & TP-260
SIP User's Manual 68 Document #: LTRT-68805
For NI-2 and DMS-100 ISDN variants the valid combinations of TON and NPI for calling
and called numbers are (Plan/Type):
 0/0 - Unknown/Unknown
 1/1 - International number in ISDN/Telephony numbering plan
 1/2 - National number in ISDN/Telephony numbering plan
 1/4 - Subscriber (local) number in ISDN/Telephony numbering plan
 9/4 - Subscriber (local) number in Private numbering plan
5.5.4 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).
¾ To configure the Phone-Context tables, take these 6 steps:
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.
Figure 5-7: Phone Context Table Screen
2. From the ‘Add Phone Context As Prefix' drop-down list, select 'Enable' to add the
received Phone-Context parameter as a prefix to outgoing ISDN SETUP Called and
Calling numbers, if necessary.
3. From the 'Phone Context Index' drop-down list, select the index number.