Planning and Installation Guide Chapter 5: Trunk Planning and Ordering
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When using NI-2 signaling on PRI trunks—for example in a tie-trunk scenario—Caller-ID
Name is now also captured when available on all inbound calls. For outbound calls, Caller-
ID Name is delivered for calls that are made to off-system extensions, but not for outbound
calls.
5.4.3 Automatic Number Identification (ANI)
Automatic Number Identification (ANI) delivers the number of the calling party to the
ShoreTel system. Although similar to Caller ID Number, ANI is tariffed differently and is
not subject to the same blocking restrictions as Caller ID Number. For instance, when you
purchase ANI services from your service provider, you are always delivered the calling
number for 800-number calls (calls that you are paying for). This may vary from region to
region.
ANI is available on analog wink-start and digital wink-start trunks.
When ANI is being used, the star key (*) must be used to delimit the ANI digits from the
DID/DNIS digits—that is, *<ANI>*<DID/DNIS>*.
5.4.4 Direct Inward Dial (DID)
Direct Inward Dial (DID) allows extensions (users, menus, workgroups, route points, etc.)
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, PRI and SIP 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, PRI or SIP 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, PRI, or SIP 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>*
5.4.5 Dialed Number Identification Service (DNIS)
Dialed Number Identification Service (DNIS) allows extensions (users, menus,
workgroups, route points, etc.) 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 Communicator -
Personal Access and stored in the call detail record.
DNIS is available on analog wink-start, digital wink-start, PRI and SIP 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-Channel message or
SIP message). The voice switches capture the digits and route the calling party to the called
party.
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