AudioCodes Mediant 3000 User Manual page 354

NPI
Private [9]
Level 2 Regional [1]
Level 1 Regional [2]
PISN Specific [3]
Level 0 Regional (local) [4]
For NI-2 and DMS-100 ISDN variants, the valid combinations of TON and NPI for calling
and called numbers include (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
User's Manual
TON
Unknown [0] A private number, but with no further information
about the numbering plan.
A private number with a location, e.g., 3932200.
A private local extension number, e.g., 2200.
Description
354
Mediant 3000
Document #: LTRT-89729