Using The Jm408 Module - Comdial DSU II System Manual

DSU II Digital Telephone System
2.14 Using The Add-On Expansion Modules
You can install optional add-on expansion modules to the DSU II common equipment base unit
to increase the line and station capacity of an installed system.
• The JM408 expansion module provides an additional four lines and eight digital proprietary
stations.
• The JM008 expansion module provides interface and ring generation for eight
industry-standard telephone devices.
Base Unit Capacity
Base Unit
Type
Lines
J0408 4
J0816 8
J1632 16
2.14.1

Using The JM408 Module

The JM408 expansion module provides to an installed system an additional four lines and eight
digital proprietary stations. The default numbering of the expanded lines and stations begin with
the next higher line or station port number from that provided by the host base unit. The
numbering continues sequentially from top module to bottom module if two modules are
installed. For example: The defaulted 8-line, 16-station base unit provides station ports 10
through 25 and lines 1 through 8. When installed, a JM408 expansion module provides station
ports 26 through 33 and lines 9 through 12 thus creating a 12 line by 24 station system.
Each expansion module provides a tip and ring pair as an emergency power failure circuit. This
circuit is connected to the first module-provided line.
Expansion
System
Module Type
Stations
one JM408
8
one JM008
one JM408
two JM408
one JM008
16
two JM008
one JM408 and
one JM008
one JM408
two JM408
one JM008
32
two JM008
one JM408 and
one Jm008
Installing The DSU II Digital Telephone System 2 – 41
Total System Capacity
System
Lines
Stations
8 16
4 8
12 24
16 32
8 16
8 16
12 24
20 40
24 48
16 32
16 32
20 40
IMI66–132
ISTs
-
8
-
-
8
16
8
-
-
8
16
8