Comdial Impact Dsu Instructions Manual

2.14 Using The Add-On Expansion Module
You can install one or two optional add-on expansion modules on the common equipment base
unit to increase the line and station capacity of an installed system.
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...

2.14.1 Expansion Capabilities
The 4-line 8-station expansion module adds station and line capability in several different
combinations.
Figure 2–20: Add-On Expansion Module Capabilities
16-Line, 32-Station Base Unit
4-Line, 8-Station Base Unit
8-Line, 16-Station Base Unit
CAJS089
24-Port System
8-LINES AND 16-STATIONS
(BASE UNIT PLUS ONE EXPANSION MODULE)
36-Port System
12-LINES AND 24-STATIONS
(BASE UNIT PLUS ONE EXPANSION MODULE)
48-Port System
60-Port System
72-Port System
16-LINES AND 32-STATIONS...

2.14.2 Connecting Stations To The Expansion Module
The station connections are available at a 50-pin connector.
Table 2–10: Connecting Stations To The G0408 Expansion Module
25-Pair Connections Two-Wire Connections Station Connections
Wire Color Pair Pin No.Clip
Term.Pair Wire Color Station Location
White-Blue
126 1
Signal PathGreen
1M
Blue-White 1 2 Red
White-Orange
227 3
Signal PathGreen
2M
Orange-White 2 4 Red
White-Green
328 5
Signal PathGreen
3M
Green-White 3 6 Red
White-Brown
429 7
Signal...

2.14.3 Installing The Add-On Expansion Module
Each add-on expansion module measures 15.5 wide x 9.4 high x 1.6 wide and weighs
approximately 4 pounds. The modules are designed so that you can attach them to the base unit
and connect them to it via cabling.
NOTE: If you plan to upgrade the system software at the same time that you add expansion
modules, be sure to add the expansion modules first by following steps 1 through 11.
After you have installed the expansion modules and programmed for the new...

Figure 2–21: Installing The Add-On Expansion Module
Typical Base Unit
Typical Add-On Module
(8-Line, 16-Station Base Unit)
Nameplate
(Remove to expose base
unit connectors)
To p
Location
Bottom
LocationUpper Mounting Holes
(2 Places)
Lower Mounting Holes
(2 Places)
Connecting Cable
and Plug
Snap Slots for
Nameplate Securing
ScrewGround
Modules
to Base
Unit
AM012
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Installing The DSU 2 – 45 

2.15 Upgrading The System Software
The following sections contain information on safety precautions you should take before
working on the common equipment, procedures for making a copy of the call cost records before
upgrading software, instructions for replacing the software cartridge, and instructions for master
clearing the system to load the new software.
2.15.1 Creating A Static Safe Work Area
CAUTION
Circuit boards are susceptible to damage caused by electrostatic discharge, and you must keep
this...

2.15.2 Saving The Call Cost Records
To save the call cost records,
1. Make a copy of the call cost records and then delete them from the system memory per the
following procedure:
To print records: pressINTERCOM, dialS# 076#, and pressSPEAKER.
To delete records: pressINTERCOM, dialS# 077#, and pressSPEAKER.
2. Use the VDT programming procedure to save the current system data base on a PC.
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Installing The DSU 2 – 47 

2.15.3 Replacing The Software Cartridge
Upgrading software in the digital telephone system consists of removing the current software
cartridge and exchanging it with a board containing updated software.
CAUTION
To avoid any chance of electrostatic discharge damage to the softtware cartridge, avoid
touching the connector with your fingers while handling it. Be sure to disconnect the AC
power and battery back up to the base unit before installing or removing a software cartridge.
To remove a cartridge,
1....

Software
Cartridge Typical
Common Equipment
Base Unit
(Lift out to remove)
CAJS091A
Software
Cartridge Typical
Common Equipment
Base Unit
(Push in to install)
CAJS091
Figure 2–23: Removing The Software Cartridge
Figure 2–24: Installing The Software Cartridge
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Installing The DSU 2 – 49 

2.15.4 Master Clearing The System
To reboot the system and load the new software,
1. Restore power to the system.
2. Perform the master clear procedure from the VDT or at the programming station as follows:
·pressINTERCOM,
·dialS# 746S,
·dial90,
·dial51684,
·pressSPEAKER.
3. Use the VDT programming procedure to re-load the system data base into the system
memory.
Digital Telephone SystemIMI66–107
2 – 50 Installing The DSU