Numbering plan identification (octet 3)

Bits

4 3 2 1

0 0 0 0

Unknown (Note 1)

0 0 0 1

ISDN/telephony numbering plan (Recommendation E.164)

1 0 0 1

Private numbering plan (ISO/IEC 11571)

All other values are reserved.

NOTE 1 – The numbering plan "unknown" is used when the user or network has no knowledge of the numbering plan. In this case, the number digits field is organized according to the network dialling plan, e.g. prefix or escape digits might be present.

Type of number (octet 3) when Numbering Plan identification is ISDN/telephony numbering plan (Recommendation E.164) (Note 2)

Bits

7 6 5

0 0 0

Unknown (Note 3)

0 0 1

International number (Note 4)

0 1 0

National number (Note 4)

1 0 0

Subscriber number (Note 4)

All others values are reserved.

NOTE 2 – For the definition of international, national and subscriber number, see Recommendation I.330.

NOTE 3 – The type of number "unknown" is used when the user or the network has no knowledge of the type of number, e.g. international number, national number, etc. In this case, the number digits field is organized according to the network dialling plan; e.g. prefix or escape digits might be present.

NOTE 4 – Prefix or escape digits shall not be included.

Type of number (octet 3) when Numbering Plan identification is Unknown

Bits

7 6 5

0 0 0

Unknown (Note 5)

All others values are reserved.

NOTE 5 – The type of number "unknown" is used when the user or the network has no knowledge of the type of number, e.g. international number, national number, etc. In this case, the number digits field is organized according to the network dialling plan; e.g. prefix or escape digits might be present.

Type of number (octet 3) when Numbering Plan identification is Private numbering plan (Note 6)

Bits

7 6 5

0 0 0

Unknown (Note 7)

0 0 1

Level 2 Regional Number

0 1 0

Level 1 Regional Number

0 1 1

PISN specific number

1 0 0

Level 0 Regional Number

All others values are reserved.

NOTE 6 – For the definition of Level 2 Regional Number, Level 1 Regional Number, Level 0 Regional Number and PISN specific number, see ISO/IEC 11571.

NOTE 7 – The type of number "unknown" is used when the user or the network has no knowledge of the type of number, e.g. Level 2, Level 1, etc. In this case, the number digits field is organized according to the network dialling plan; e.g. prefix or escape digits might be present.

Number digits (octets 4, etc.)

This field is coded with IA5 characters, according to the formats specified in the appropriate numbering/dialling plan.