Instruction manual
Tie Trunks
Tie Trunks
Description
Tie trunks provide
Incoming tie trunk
endpoint. Service
private
communications links between System 25 and other PBXS
calls may be directed to the attendant, to a voice terminal, or to a data
may be either automatic, immediate dial, delay dial, or wink start. Dial
pulse or touch-tone signaling is supported on both incoming and outgoing calls (and may be
different for incoming and outgoing calls).
Considerations
Tie Trunks provide for efficient communications
locations. This provides a private network whose
between company employees at different
control and utilization can be managed.
Tie trunks can be administered for tandem trunking. This arrangement enables users to call
through an intermediate System 25 to a remote System 25 or other PBX. Refer to the
“Tandem Trunking” feature description for more information.
Interactions
The following features interact with Tie Trunks.
Automatic Route Selection (ARS): Immediate dial tie trunks should not be used in ARS
routing patterns.
Callback Queuing: Tie Trunk groups can be administered for Callback Queueing. If a user
dials a Tie Trunk number and all trunks in the group are busy, the user must either wait for
timeout or dial # to get queuing tone (if automatic queuing is administered) or reorder tone.
Manual queuing can be activated after reorder tone is heard.
Conference: A tie trunk that is part of a conference counts as one of two allowable outside
parties.
Direct Group Calling: Only automatic incoming tie trunks can be directed to a DGC group.
However, dial-in tie trunks can access DGC groups.
Night Service:
Dial-in tie trunks cannot serve as Night Service trunks.
Personal Lines: When a dial-in tie trunk is assigned as a Personal Line and the line is used
for outgoing service at the same time that a call is coming in on the line, the terminal may be
connected to the incoming call even though the call is intended for another terminal that
shares the line.
For this reason, it is recommended that tie trunks not be assigned as
Personal Lines.
2-337