Specifications

Configuring Trunks
7 – 16 ShoreTel, Inc.
Off-System Extensions
If you are using off-system extensions, you can list them by clicking the Edit button on
the Trunk Group edit page. Off-system extensions are typically used when setting up a
tie trunk to a legacy PBX and configuring coordinated extension dialing. Also refer to
“Creating AMIS Systems” on page 11-6. Figure 7-15 shows the dialog boxes used to
define ranges of extensions.
Figure 7-15 Configuring Off-System Extensions
Tandem Trunking
Tandem trunking treats digits on an incoming trunk call as a PSTN number. Received
digits are tested against DNIS, DID, Extension, and Tandem Trunking, in that order.
When Tandem Trunking is enabled, the number of digits from the CO may have no
effect if the first digit(s) matches a Trunk Access Code. To define trunk access and call
permissions, associate a user group with the tandem trunk group.
Any Dial In Prefix is pre-pended to each set of inbound digits. You can use DNIS/DID/
Extension matching with a Dial In Prefix.
When using NI-2 signaling on PRI trunks—for example in a tie trunk scenario—Caller
ID name is also captured, when available, on all inbound calls. For outbound calls, the
Caller ID name is delivered for calls that are made to off-system extensions, but not
generally for all outbound calls.
Tandem calls are reported in the Trunk Detail and Trunk Summary reports, with
incoming and outgoing legs reported according to the reports’ formats.