5.5.7 Flexible Numbering/Fixed Numbering
Description
To dial another extension user or to access PBX features, the access numbers (extension numbers or feature
numbers) are required.
There are three types of numbering plans:
1. Flexible Numbering (available while a dial tone is heard)
2. Flexible Numbering (available while a busy, DND, or ringback tone is heard)
3. Fixed Numbering (available while dialling or talking)
1. Flexible Numbering (available while a dial tone is heard)
Extension numbers and feature numbers which are available while a dial tone is heard can be customised
for easy use. The numbers must not conflict. It is also possible to use the default settings shown in the
following table.
a. Extension Numbers: Extension numbers consist of leading numbers and additional numbers.
Extension numbers (consisting of "0" through "9") can be assigned as follows:
• Numbering schemes: 1-64
• Leading number: up to three digits
• Additional number: up to two digits (default: two digits)
b. Feature Numbers: A number of up to four digits, consisting of "0" through "9", " ", and "#"
c. Other PBX Extension Numbers (Other PBX Extension Number [TIE] -1 through 16): A number of
up to three digits, consisting of "0" through "9", " ", and "#"
[Flexible Numbering Table (available while a dial tone is heard)]
Feature
Default
Extension Numbering Scheme 1—Leading Number
1 / 2
Extension Numbering Scheme 2—Leading Number
2 / 3
Extension Numbering Scheme 3—Leading Number
3 / 4
Extension Numbering Scheme 4—Leading Number
4 / 1
Extension Numbering Scheme 5–20—Leading Number
None
Extension Numbering Scheme 21—Leading Number
50
Extension Numbering Scheme 22—Leading Number
51
Extension Numbering Scheme 23—Leading Number
52
Extension Numbering Scheme 24—Leading Number
53
Extension Numbering Scheme 25—Leading Number
54
Extension Numbering Scheme 26—Leading Number
55
Extension Numbering Scheme 27—Leading Number
56
Extension Numbering Scheme 28—Leading Number
57
Extension Numbering Scheme 29—Leading Number
58
Extension Numbering Scheme 30—Leading Number
59
Extension Numbering Scheme 31—Leading Number
6
486 Feature Guide
5.5.7 Flexible Numbering/Fixed Numbering