User guide

System Administrator’s Guide – Release 7.5
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Toll Free 1-866-ALLWORX • 585-421-3850 • www.allworx.com
Revised: April 9, 2013
Page 163
22 Direct Inward Dialing (DID)
Direct inward dialing (DID) is a service offered by a local telephone company that
provides a block of phone numbers for calling into a PBX without requiring a physical
line for each number. In cooperation with the PBX, map each number to a PBX
extension. Each PBX user has a unique outside number used to ring the user’s phone
directly, rather than directing the incoming call to an Auto Attendant.
There are three steps to configuring the Allworx server for DID service:
1. Create a DID block.
2. Configure the call routing plan for the DID block.
3. Create a DID line for each DID trunk line plugged into the server.
0.
To create a DID Block:
1. Navigate to Phone System > Outside Lines.
2. Go to the Direct Inward Dial Blocks section, and click the add new DID Block
link.
3. Enter the Starting Phone Number and Total number of phone numbers in the
DID Block fields as specified by the telephone company.
4. Click Add when complete. 0.
Note: If the site’s phone numbers are scattered over a range of numbers, you may
create DID blocks for each individual or grouping of phone numbers. However, it is
preferable to create a larger DID block that spans multiple DID ranges, even if
many of the numbers in the block are not being used. Doing so makes
management of the blocks easier. Also, since there is a limit to the number of DID
blocks that can be assigned to any outside line (128 blocks per line), combining
DID numbers into larger blocks will avoid reaching this limit.
To configure a Call Routing Plan for the DID Block:
1. Create the DID block.