Specifications

Routing Calls
Planning and Installation Guide 4 – 13
Analyze Outbound Call Routing
In general, you should have trunks at every site that support both outbound and
inbound calling. Here are some general comments about outbound trunking:
• ISDN PRI provides the most feature-rich inbound and outbound calling
experience.
This includes the support for Caller ID, DID, and DNIS. Caller ID Number is
supported for both inbound and outbound calls. Caller ID Name is supported only
on inbound NI-2 trunks (with the exception of outbound calls to off-system
extensions).
• SIP trunks can be used to place outbound calls.
• Analog wink-start trunks do not support outbound calls.
• You may want to purchase some analog loop-start trunks for emergency dial tone
in case of total power failure. For more information, see “Analog Loop-Start
Trunks” on page 5-2.
• Calls can be automatically routed across your wide area network (WAN) using the
Network Call Routing feature.
This allows users to access local and “nearby” area codes at one site from another
site.
• You need to plan for emergency calls (such as 911 in the United States) on your
voice system.
The ShoreTel 6.1 system supports all the necessary signaling for emergency calls.
Please see the appendix on emergency 911 operations in the ShoreTel 6
Administration Guide for information on how to configure your system for
emergency calls.
NOTE If your system uses three-digit extensions, ShoreTel recommends that you do not
assign x11 extensions to users.
For more information, see Chapter 5, “Trunk Planning and Ordering,” and Chapter 6,
“Dialing Plan.”