Installation guide

Configuring Internal Numbers Dialing Plan
6
ShoreTel 14.2 Planning and Installation Guide 105
Figure 12: Dialing Plan Edit Page
Planning Your Dialing Configuration
When setting up a dialing plan for internal numbers, you need to consider the following:
 Choose an extension length. ShoreTel supports 3-, 4-, and 5-digit dialing for internal numbers. 4-
digit dialing works for most enterprises. Use an extension number scheme that conforms to your
company’s size and the convenience of your users.
 Map extension ranges. After choosing the extension length, you can allocate blocks of numbers
for use by extension, starting with the first number.
For example, if you want to reserve the range of numbers 3000-3999 for extension assignment,
you allocate the “3” number block for extensions.
For maximum usability, map extension numbers to the final digits of your DID (if DID is used).
Note
Extensions cannot begin with the following combinations that include 911: 911, 911x, or 911xx.