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ADMINISTRATION OPTIONS AND REQUIREMENTS — SYSTEM 85
7-19
ENHANCED MODE - PROCEDURE: 354, WORD: 3
NPA-NXX ASSIGNMENT
1.
2.
3.
4.
NPA-NXX Designator:
NPA:
NXX:
Thousand's Digit:
Connected to CC0 ON-LINE
enter command:
Figure 7-6. Procedure 354 Word 3: NPA – NXX Assignment (System 85 R2V4)
Field 1
Field 2
Field 3
This field should be translated for both private-and public-network connections.
The NPA-NXX designator is a 2-digit field and must be within the range of 1
through 99.
This 3-digit field should contain the numbering plan area (NPA), which is also
called the area code. Assignment is therefore dependent on the particular location
and application.
This 3-digit field should specify the NXX, which is also called the local exchange
company (LEC). Permitted values must be those numbers within the range of 200
through 999 and should be the office code of the local exchange.
This l-digit field specifies the thousands digit. When not used, it should contain
(–). When used, digits 0 through 9 may be assigned. Use this field only with
three-digit dial plans. Do not use it with four- or five-digit dial plans.
Field 4
Procedure 000 Word 4: NPA-NXX Index Designator
Depending on how the switch is used, procedure 000, word 4, may or may not be translated.
Specifically, field 4 of word 4 is used for partitioning, ISDN, or both, and must be translated when:
a.
The switch transmits SID or connected number to the network
b.
The switch provides unique extension number partitions