Specifications

Legacy Integration
14 – 2 ShoreTel, Inc.
Introduction
A digital trunk “tie” line integrates the ShoreTel 6.1 system with a legacy PBX. The
connection is between the legacy system’s T1/PRI interface and the T1/PRI interface of a
ShoreGear-T1 located anywhere in your IP network.
There are four different types of activities that occur in the interface.
• Calls from ShoreTel 6.1 users or applications to an extension located on the other
system are routed across the trunk. When a call is placed, the trunk is accessed
and the ShoreTel 6.1 system sends the configured number of digits to the PBX
identifying the called extension.
• Calls from users on the legacy system or from trunks, or other applications on the
legacy PBX, are routed across this interface. When the legacy user places their call,
the legacy system accesses the trunk and then sends the digits as DNIS.
• Outbound calls from users or applications on the ShoreTel 6.1 system can be
routed across the trunk to the legacy PBX. When a call is placed, the trunk access
code or trunk configuration of the connection to the legacy PBX indicates the
outbound call is to be placed to the PBX.
• Calls between the ShoreTel 6.1 and legacy system's voice mail applications are
carried across the trunk connecting the two systems. The voice mail systems make
calls to configured destinations on the other system to send voice mail messages to
users on the other system.
NOTE A tie trunk is not required to enable voice mail or AMIS integration. The two
voice mail systems can communicate by dialing each other via the PSTN. In
general, when a tie trunk is in place, AMIS calls should be routed via the trunk
to reduce PSTN costs.
The connection between the two systems can be provided by either T1 trunks or by
using a PRI interface. ShoreTel recommends that you use PRI to enable calling number
information exchanges between the two systems.
Coordinated Dialing
Coordinated dialing allows users to dial between the systems using extension-to-
extension dialing as well as enabling consolidation of inbound and outbound services.
To effectively plan the integration, consider the following items:
• Expected call traffic between the two systems to provide sufficient trunking.
• Current numbers of extensions and extension lengths at both systems.
• Service plans to determine which PSTN services are provided at which voice
system.
• The type of legacy PBX equipment integrated with the ShoreTel 6.1 system.
❑ Voice Mail Integration
page 14-5
❑ System Requirements
page 14-28
❑ Connection Cable
page 14-28
❑ Administration and Configuration
page 14-29
❑ Trunk Configuration
page 14-30
Task Description See