Numbering Plans and Type of Number
The IP-to-Tel destination or source number manipulation tables allow you to classify numbers by their Numbering Plan Indication (NPI) and Type of Number (TON). The device supports all NPI/TON classifications used in the ETSI ISDN variant, as shown in the table below:
NPI/TON Values for ETSI ISDN Variant
|
NPI |
TON |
Description |
|---|---|---|
|
Unknown [0] |
Unknown [0] |
A valid classification, but one that has no information about the numbering plan. |
|
E.164 Public [1]
|
Unknown [0] |
A public number in E.164 format, but no information on what kind of E.164 number. |
|
International-Level2 Regional [1] |
A public number in complete international E.164 format, e.g., 16135551234. |
|
|
National-Level1 Regional [2] |
A public number in complete national E.164 format, e.g., 6135551234. |
|
|
Network-PSTN Specific [3] |
The type of number "network specific number" is used to indicate administration / service number specific to the serving network, e.g., used to access an operator. |
|
|
Subscriber-Level0 Regional [4] |
A public number in complete E.164 format representing a local subscriber, e.g., 5551234. |
|
|
Abbreviated [6] |
The support of this code is network dependent. The number provided in this information element presents a shorthand representation of the complete number in the specified numbering plan as supported by the network. |
|
|
Private [9]
|
Unknown [0] |
A private number, but with no further information about the numbering plan. |
|
International-Level2 Regional [1] |
- |
|
|
National-Level1 Regional [2] |
A private number with a location, e.g., 3932200. |
|
|
PISN Specific [3] |
- |
|
|
Subscriber-Level0 Regional [4] |
A private local extension number, e.g., 2200. |
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 |