Planning and Installation Guide Chapter 6: Dialing Plan
6.5 On-Net Dialing
ShoreTel supports On-Net Dialing (OND), an enhancement that allows users to create
more flexible dialing plans than before. In contrast with previous releases which could only
support a “flat” dialing plan and treated all numbers as a single, indivisible unit, the On-
Net Dialing feature allows users to divide phone numbers into two separately-managed
extension prefix - typically 3 digits in length; similar in concept to a site code
user extension - typically 4 digits in length; acts as the number you would dial to
reach other users in your organization
By dividing phone numbers into two parts, the OND feature provides customers with a
more seamless method of migrating from their legacy phone systems to the newer ShoreTel
system. OND allows customers to preserve their existing dialing plans when integrating
ShoreTel equipment with their legacy equipment. While previous releases allowed
customers to integrate ShoreTel equipment with their legacy PBX, the configurations
needed to maintain the customer's existing dialing plan were complex and the complexity
increased with the number of people and extensions involved.
Prepend this Dial Out
The Dial Out Prefix is prepended to the number. This
feature is typically used when connecting the ShoreTel
system to a legacy PBX system using a ShoreGear voice
switch. The Dial Out Prefix enables the ShoreTel system
to seize a trunk on the legacy PBX. The Dial Out Prefix is
not applied to Off-System Extensions.
Vertical Service Codes If a Vertical Service Code was dialed, digit manipulation
rules do not apply.
Vertical Service Codes work with ISDN PRI trunks and
some loop-start trunks.
• With PRI trunks, Vertical Service Codes for Caller ID
Blocking control will be converted to D-Channel
• With loop-start trunks, the service provider must be
able to accept the outpulsed digits with only 50 msecs
of pause between each digit, including the service
Vertical Service Codes are typically not supported by
service providers on wink-start trunks. If you have
outbound access on wink-start trunks and you dial a
vertical service code, you will likely get an error message
from the service provider.
Off System Extensions Off System Extensions define ranges of extensions that
when dialed will be routed out of this trunk group. This is
typically used to interface to a legacy PBX system using a
T1 or E1 circuit provided by a ShoreGear voice switch.
Off-system extensions digits can be manipulated using a
Digit manipulation, including the Dial Out Prefix, will
not be applied to these calls.
Option Description Example
Table 6-3 Digit Manipulation Options