NEC UNIVERGE UM8000 User Manual page 19

Assigning System IDs
A system ID is a unique identification number that is used to identify a subscriber, guest, transaction box, voice detect
box, or interview box. System IDs are numbers that callers dial to access subscriber extensions and mailboxes. System
IDs are used to link boxes for advanced call routing and audio text.
NOTE
D ID
UPLICATE SYSTEM S ARE NOT PERMITTED IN THE MESSAGING SYSTEM
Before assigning system IDs:
• Estimate what kind and how many system IDs are needed.
• Design a simple, easy to use, system ID numbering plan and use it consistently. All system IDs should contain the
same number of digits.
• Assign system IDs using numbers rather than letters. When system IDs are assigned by letters, duplication can
occur, both SANDY and RANDY, have the same ID number, 72639.
The number of system IDs required in a system determines the number of digits used in the ID. The following table
shows how many unique IDs are available for a particular numbering plan. When creating system IDs to allow for a
range of unused system IDs; this enables future system expansion, for new subscribers, transaction boxes, interview
boxes, and subscriber guests.
Determining the Number of Unique IDs for an ID Numbering Plan
Number of digits in
each ID
1
2
3
4
5
6
7
8
9
10
NOTE
S
OME PHONE SYSTEMS MIGHT NOT SUPPORT TEN DIGIT SYSTEM
Related Topics
Understanding System and Personal IDs
Following Recommended Security Practices
System Overview
Number of unique IDs (assumes
system operator box ID is 0)
9
90
900
9,000
90,000
900,000
9,000,000
90,000,000
900,000,000
9,000,000,000
.
ID .
S
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