Specifications

Trunk Planning and Ordering
Planning and Installation Guide 5 – 9
Outbound Caller ID
The ShoreTel 6.1 system sends the user’s DID number as the caller ID number for
outbound calls over PRI trunks. If the DID number is unavailable, the site Caller
Emergency Service ID (CESID) is used. If that number is unavailable, no caller ID
appears for outbound calls.
Additionally, the outbound caller ID can be configured on a per-user basis such that the
configured value can take precedence over the user's DID number or the site CESID.
Note that this feature is only available on outbound calls using a T1 PRI trunk.
• To send a single main number rather than a user’s DID number, simply assign
DNIS entries rather than DID numbers to each user, and the Site Contact Number
will be sent instead.
• To block all outbound caller ID numbers from being sent, you can configure the
PRI trunk group to always block the caller ID number.
• On wink-start and loop-start trunks, the outbound caller ID is defined by the
service provider.
• On T1 PRI and loop-start trunks, users can override the Caller ID Blocking
configuration on a call-by-call basis by using commands at the telephone (*67,
*82). Users cannot override the Caller ID Blocking configuration of wink-start and
E1 PRI trunks.
For more information on configuring outbound caller ID, please refer to the ShoreTel 6
Administration Guide.
Tandem Trunking
Tandem trunking allows legacy voice systems to utilize a ShoreTel system for outbound
dialing. The ShoreTel system supports both user-side and network-side PRI, allowing
ShoreTel 6.1 systems to flexibly support digital tie trunks to other systems.
You can enable tandem trunking support for any PRI trunk group with a simple check
box in Shoreware Director. Tandem calls are associated with a user group for outbound
trunk selection. Inbound calls recognized as tandem calls are redirected to an outbound
trunk based on the user group call permissions and trunk group access. When needed,
a “dial-in prefix” can be specified that is pre-appended to digits collected on tandem
calls. The concatenated set of digits is then used in outbound trunk selection for the
tandem call.
Tie Trunks
The addition of network-side PRI support makes PRI tie trunks easier and more
compelling to deploy. ShoreGear-T1 switches can now act as either the user-side or
network-side of a PRI tie trunk. The tie trunk may be used to tie a ShoreTel system to a
legacy voice system, or potentially to another independent ShoreTel system.
Performing Traffic Calculations
The number of trunks required on your system will vary depending on the number of
users and your specific application needs. It is important to order your trunking
correctly; too few can lead to blocked calls when all trunks are busy, and too many
trunks can lead to wasted money on monthly access charges.
See Chapter 3, “Planning and System Design,” for information about calculating the
trunk requirements for your site.