The Industry-Standard Telephone Interface; Ist Station Port Line Assignment - Comdial DSU II System Manual

IMI66–132
3.10 The Industry-Standard Telephone (IST) Interface
The JM008 Expansion Module
The JM008 expansion module is an optional accessory cabinet that you mount on the DSU II's common
equipment cabinet to provide the system with an interface for eight IST devices.
The Analog Terminal Interface
The Analog Terminal Interface device (ATI-D) is a multipurpose on-premise accessory. It has dual
circuits that allows the connection of two IST devices to the DSU II system.
NOTE: Connect the first ATI-D port to an even station port. All ATI-D ports must be paired.
Understanding The Programming Requirements For The IST Interface
The IST provides basic intercom service coupled with the ability to access outside lines. Through
programming, the IST acts as either an intercom-only telephone or as a full-featured business telephone.
You can program the station port through which the IST is being interfaced either for prime intercom or
for prime line automatic and idle line preference. (Default is for prime intercom.) You can also program
the station port for distinctive ringing and to match the type of dialing method employed by the IST.
You should make a record in Chapter 4 of all programming decisions that you make—it will help you
keep track of what you have done and will help you troubleshoot any problem that might arise later.
NOTE: A lighted LED next to the programming button for the selection indicates the current
configuration. When a single button provides a toggle (on/off) action, the lighted LED
indicates the active feature.
The first step in any programming sequence is to enter the base level. Once in this mode, you can dial the
feature code for any desired configuration. Enter the base level by pressing INTERCOM, then dialing
# 7 4 6 . Press the SPEAKER button to end the programming procedure and return the system to
normal operation.
3.10.1

IST Station Port Line Assignment

Description: When you program the port through which the IST is interfaced for prime
intercom, the affect on the user is different depending upon whether the system is
operating as a key system or as a hybrid system
—On key configured systems, proprietary telephone users give the IST access to outside
lines for call origination through the use of the call transfer feature. You can assign
outside line ringing to the station port for IST call answering purposes by programming
the station port for the ringing line preference feature and enable ringing for all desired
lines.
—On hybrid configured systems, the system gives the IST access to outside lines through
line group access. With line group access, IST users dial the group access code over the
intercom line to access an outside line for use. The common equipment then selects one
of the grouped idle lines for use in the order from the highest numbered line to the lowest
numbered line.
When you program the port through which the IST is interfaced for Prime Line
Automatic And Idle Line Preference, program an outside line as a prime line at the
station port, or program the station port for idle line preference and then program one of
the assigned idle lines as a prime line. With both the prime line automatic and the idle
3 – 92 Programming The DSU II System
DSU II Digital Telephone System