Specifications

Trunk Planning and Ordering

5 – 8 ShoreTel, Inc.

Direct Inward Dial (DID)

Direct Inward Dial (DID) allows extensions (users, menus, workgroups, and route

points) on the system to be accessed directly, without the need of an auto-attendant or

operator. This is particularly useful when users on the system want their own

telephone number.

DID is available on analog wink-start, digital wink-start, and PRI trunks.

DID numbers are ordered in blocks of 20 or more 10-digit telephone numbers. These

numbers are assigned to a customer and are routed to a wink-start or PRI trunk

connected to a voice switch. When a call is made, the service provider sends a

predefined set of digits (from 3 to 10 digits) via the wink-start or PRI trunk. The voice

switches capture the digits and route the calling party to the called party.

If ANI is not being used on wink-start trunks, only the DNIS digits need to be

delivered. If ANI is being used, the star (*) key must be used to delimit the ANI digits

from the DID/DNIS digits—that is:

• <DID>

• <DNIS>

• *<ANI>*<DID/DNIS>*

Dialed Number Identification Service (DNIS)

Dialed Number Identification Service (DNIS) allows extensions (users, menus,

workgroups, and route points) on the system to be accessed directly, without the need

of an auto-attendant or operator. This is particularly useful for workgroup and other

call center applications. The DNIS information is delivered to the ShoreTel Personal

Call Manager and stored in the call detail record.

DNIS is available on analog wink-start, digital wink-start, and PRI trunks.

DNIS numbers are ordered individually and map to a dialed number. When a calling

party dials a specific telephone number, the service provider routes the call to a wink-

start or PRI trunk connected to a voice switch. The service provider sends a predefined

set of digits (from 3 to 10 digits)—the DNIS digits—using DTMF signaling (or a D-