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 provides station ports 10 through 25 and lines 1 through 8.
When installed, a 408 Expansion module will provide 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.
The line connections of the expansion module are available at two modular jacks. When facing
the jack openings, lines 1 and 2 are provided by the jack on the right and lines 3 and 4 are
provided by the jack on the left.
Table 2–9: Connecting Lines To The G0408 Expansion Module
Line
JackPin
Number ConnectionTelephone
Number
11 No Connection
2 Line 2M Tip
3 Line 1M Tip
4 Line 1MRing
5 Line 2M Ring
6 No Connection
21 No Connection
2 Line 4M Tip
3 Line 3M Tip
4 Line 3M Ring
5 Line 4M Ring
6 No Connection
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Installing The DSU 2 – 41 
						

							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
(BASE UNIT PLUS TWO EXPANSION MODULES)
20-LINES AND 40-STATIONS
(BASE UNIT PLUS ONE EXPANSION MODULE)
24-LINES AND 48-STATIONS
(BASE UNIT PLUS TWO EXPANSION MODULES)
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							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 PathGreen
4M
Brown-White 4 8 Red
White-Slate
530 9
Signal PathGreen
5M
Slate-White 5 10 Red
Red-Blue
631 11
Signal PathGreen
6M
Blue-Red 6 12 Red
Red-Orange
732 13
Signal PathGreen
7M
Orange-Red 7 14 Red
Red-Green
833 15
Signal PathGreen
8M
Green-Red 8 16 Red
Red-Brown
934 17
Spare Pair Brown-Red 9 18
Red-Slate
1035 19
Slate-Red 10 20
Black-Blue
1136 21
Blue-Black 11 22
Black-Orange
1237 23
Orange-Black 12 24
Black-Green
1338 25
Green-Black 13 26
Black-Brown
1439 27
Brown-Black 14 28
Black-Slate
1540 29
Slate-Black 15 30
Yellow-Blue
1641 31
Blue-Yellow 16 32
Yellow-Orange
1742 33
Orange-Yellow 17 34
Yellow-Green
1843 35
Green-Yellow 18 36
Yellow-Brown
1944 37
Brown-Yellow 19 38
Yellow-Slate
2045 39
Slate-Yellow 20 40
Violet-Blue
2146 41
Blue-Violet 21 42
Violet-Orange
2247 43
Orange-Violet 22 44
Violet-Green
2348 45
Green-Violet 23 46
Violet-Brown
2449 47
Brown-Violet 24 48
Violet-Slate
2550 49
Signal PathTip
Power Fail Station
Slate-Violet 25 50 Ring
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							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 stations
and line ports, you can then upgrade the software as described in the discussion
titled,Upgrading The System Software.
To install an expansion module to a base unit, follow the procedure detailed in steps 1–11.
CAUTION
You must always connect the first module to the top location on the base unit.
1. Disconnect both AC power and external battery back-up power from the system.
2. Remove and set aside nameplate from base unit. This action exposes internal cable connector
on base unit circuit board.
3. Reach through opening in base unit and mate module cable plug with base unit circuit board
connectors.
4. Push excess cable inside base unit housing through connector opening.
5. Install expansion module in place on all four mounting holes. Be sure excess cable is not
pinched between add-on module and base unit.
6. Pull module down to latch in place.
7. Use flat-blade screw driver to tighten module securing screw into base unit threaded fastener.
8. Snap nameplate into slots on top of module housing.
9. Attach #10 or #12 insulated, solid copper wire between the frame ground stud on the
expansion module and the frame ground stud on the common equipment cabinet.
10. Reconnect the power to the system.
11. Refer to Chapter 3, and perform configuration programming for new station and line ports.
Digital Telephone SystemIMI66–107
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							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
IMI66–107Digital Telephone System
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 fact in mind as you handle them.
When servicing the common equipment cabinet, it is a good practice to prepare a static-safe
work area on which to service the cabinet.
Supply yourself with a static discharge wrist strap, and wear it every time you handle electronic
circuit boards either at the cabinet mounting location or at your work area.
Figure 2–22: Creating A Static Safe Work Area
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							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.
IMI66–107Digital Telephone System
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. Place the end of a flat-blade screwdriver into the removal notch. Lift up on the cartridge with
the screwdriver to un-mate the connections.
2. Slide the cartridge out of the base unit.
NOTE: Only replacement software designed for a particular cabinet may be put in that
cabinet. Example: Only 408 software will work in the 408 cabinet.
To install a cartridge,
1. Orient the cartridge so that the connector end is toward the base unit opening. The removal
notch, located at the top rear of the cartridge, should point to the front of the base unit.
2. Gently insert the cartridge into the base unit cabinet until it seats into place. Press down on
the cartridge to secure the connection.
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							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
IMI66–107Digital Telephone System
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.
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