Comdial FXSDS-04 Instruction Manual

Installing The Digital Station Board
In The FX Digital Communications System
Introducing The Digital Station Boards
The digital station board supports the operation of all Comdial proprietary digital multiline telephones.
Inventorying The Digital Station Boards
There are six models of station boards available for use.
FXSDS–04 supports four multiline and single-line proprietary digital telephones
FXSDS–08 supports eight multiline and single-line proprietary digital telephones
FXSDS–16 supports 16 multiline and single-line proprietary digital telephones
FXLDS–04 supports four multiline, large-display, proprietary digital telephones
FXLDS–08 supports eight multiline, large-display, proprietary digital telephones
FXLDS–16 supports 16 multiline, large-display, proprietary digital telephones
Complying With Underwriters Laboratories Regulations
Per The Underwriters Laboratories regulation 1950, be aware of the following precautions when installing
telephone equipment that is to be directly connected to the telephone company network:
•Never install telephone wiring during a lightning storm.
•Never install telephone jacks in wet locations unless the jack is specifically designed for wet locations.
•Never touch uninsulated telephone wires or terminals unless the telephone line has been disconnected at the
network interface.
•Use caution when installing or modifying telephone lines.
•Avoid using a telephone (other than a cordless type) during an electrical storm—there may be a remote risk of
electrical shock from lightning.
•Do not use the telephone to report a gas leak in the vicinity of the leak.
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This manual has been developed by Comdial Corporation (the “Company”) and is intended for the use of its customers and service personnel. The information in this manual is subject to change without notice.
While every effort has been made to eliminate errors, the Company disclaims liability for any difficulties arising from the interpretation of the information contained herein.
The information contained herein does not purport to cover all details or variations in equipment nor to provide for every possible contingency to be met in connection with installation, operation, or
maintenance. Should further information be desired, or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, contact Comdial, Inside Sales Department,
Charlottesville, Virginia 22906.
Printed in U.S.A. IMI89-267.02
11/98

Removing and Installing Circuit Boards in the Equipment Cabinet
CAUTION
Circuit boards for the FX system are susceptible to damage caused by electrostatic discharge, and you
must keep this fact in mind as you handle the circuit boards. Refer to the Comdial publication
IMI01-005, Handling Of Electrostatically Sensitive Components, for general information. Specific
handling precautions are also included in this installation instruction.
The equipment cabinet provides universal slots that will accept either line or station boards.
When removing or installing circuit boards in the equipment cabinet, you must install a static discharge wrist
strap on your bare wrist, and adjust it for a snug fit. Be sure that the strap is touching bare skin and is not isolated
by clothing. Connect the wrist strap cord between the wrist strap and a AC or earth ground.
Unless a circuit board has a pre-charge port on its front panel, disconnect the AC power cord from the AC service
outlet and disconnect the cable between the cabinet and any external battery back-up assembly before you remove
or install the circuit board. However, if the board does include a pre-charge port, you can connect a standard
telephone handset cord between the pre-charge port on the circuit board and the pre-charge port on the power
supply assembly and remove or install the circuit board while the system is operating.
Whenever you remove a circuit board from the cabinet, immediately place the board in a static protection bag
while you still have your wrist strap in place and properly grounded.
2 Removing and Installing Circuit Boards in the Equipment Cabinet
IMI89–267 Installing The Digital Station Board

Creating A Static Safe Work Area
When removing circuit boards from an installation location for servicing, always transport them to a static-safe
work area in static protection bags. If you do not already have a static-safe work area, you can create one by
arranging a work area as detailed in the illustration.
Removing and Installing Circuit Boards in the Equipment Cabinet 3
Installing The Digital Station Board IMI89–267
Typical Earth
Ground
Static
Wrist
Strap
ESD Protective
Mat
ESD Protective
Mat
ESD Protective
Worksurface
Static2
Common Point Ground
Creating A Static Safe Work Area

Removing and Installing Station Boards
1. Normally you should disconnect the AC power cord from the AC outlet and disconnect the optional battery
back-up assembly from the power supply; however, when necessary, you can remove or install a digital
station board in an operating system. If you must do this, connect one end of a standard telephone handset coil
cord to the precharge port on the power supply. During step 5, you will connect the other end of this coil cord
to the precharge jack on the line board.
CAUTION
Do not install digital station boards in an operating system unless the board revision's meet the following
criteria:
•FXLDS board revision D or higher
•FXSDS board revision E or higher
2. Install your static discharge wrist strap on your bare wrist; adjust it for a snug fit. Be sure that the strap is
touching bare skin and is not isolated by clothing. Connect the wrist strap cord between the wrist strap and an
AC or earth ground
NOTE: With the common equipment in the installed position, the ground lug on the side of the cabinet is an
appropriate grounding point since it should have a heavy ground wire connected between it and a good
earth ground.
3. Each new station board is supplied in a static protection bag for safe keeping. When you are ready to install
the board, remove it from its static protection bag. Conversely, when you remove a station board from the
cabinet, immediately place it in a static protection bag.
4. Locate the proper board slot—on FX systems the station boards connect to any universal slot.
5. If you are removing or installing the station board in an operating system, connect the free end of the
precharge cord that you installed in step 1 to the precharge jack on the station board.
6. If you are removing station boards from the cabinet, remove the retaining hardware, pull the boards toward
you until their board edge connectors separate from the cabinet’s backplane connection, and slid the boards
free of the cabinet.
7. To install station boards, orient them with the left and right guides in cabinet board cage. and press the boards
firmly until their board edge connectors properly mate with the connection on the cabinet’s backplane.
8. Make a final inspection to ensure that all station boards are oriented correctly and mated properly.
9. Install and tighten the supplied screws to secure the installed boards to the board cage.
10. Each station board includes a ferrite collar. Snap the ferrite collar around the cable to provide protection
against radio frequency interference.
4 Removing and Installing Circuit Boards in the Equipment Cabinet
IMI89–267 Installing The Digital Station Board

Removing and Installing Circuit Boards in the Equipment Cabinet 5
Installing The Digital Station Board IMI89–267
screws2.cdr
Locating Board Hardware
remove.cdr
Removing And Installing Circuit Boards

Connecting The Stations
Connections between the telephone stations and the common equipment station boards are typically via type
66M-xx connector blocks that are cable connected to 50-pin male connectors on the station boards.
The American Wire Gauge (AWG) size of the station wiring determines the maximum distance allowed from the
common equipment to the stations. The following chart details this relationship.
Station Type Wire Gauge
20 AWG 22 AWG 24 AWG
Digital Telephone 2500 Feet 2000 Feet 1500 Feet
If spare conductors exist in the cables that you run between the station boards and the 66M-xx connector blocks, it
is a good practice to connect the spare conductors to earth ground. Doing this may help prevent the spare
connectors from inducing radio frequency and/or AC interference into the system.
Remember, you should snap a ferrite collar around each station cable to provide protection against radio
frequency interference.
Installing DSS/BLF Consoles
Install a DSS/BLF Console at any station port in the system as a companion to a system telephone.
•The FX System supports a maximum of four consoles for each telephone and there is no limit to the maximum
number of consoles that you can install on a system. Typically, the console capacity is equal to one-half of the
total station capacity of the system.
•The installed distance limit between the station board and the console is the same as that allowed for a digital
telephone.
When you install a DSS/BLF console, you must program define the station port as a console port.
6 Connecting The Stations
IMI89–267 Installing The Digital Station Board

Connecting The Stations 7
Installing The Digital Station Board IMI89–267
Station Board 50-Pin Connector
Snap a ferrite block around each station cable.
Route the station cable to the station termination
(typically a type 66M-xx connector block).
Punch down the station wiring
on the 66M-xx connector block.
Route the house wiring for the stations from the
station termination to individual station jacks
(typically 625A-4 modular wall jacks).
654321
TI RI
R2T2
GREEN RED
Front
View
Of Jack
1 No Connection
2 No Connection
3 Ring 1-Red Wire-Voice
4 Tip 1-Green Wire-Voice
5 No Connection
6 No Connection
Station Site
station.cdr
Making A Station Connection

Detailing Digital Station Board Connections
25-Pair Connections Station Pair Connections Station Identification
Wire Color Pair Pin
No. Clip Term. Pair Identification Wire Color Station Location (note the site
position in this column)
White-Blue 126 1 Signal Path Green 1
Blue-White 1 2 Red
White-Orange 227 3 Signal Path Yellow 2
Orange-White 2 4 Black
White-Green 328 5 Signal Path Green 3
Green-White 3 6 Red
White-Brown 429 7 Signal Path Yellow 4
Brown-White 4 8 Black
White-Slate 530 9 Signal Path Green 5
Slate-White 5 10 Red
Red-Blue 631 11 Signal Path Yellow 6
Blue-Red 6 12 Black
Red-Orange 732 13 Signal Path Green 7
Orange-Red 7 14 Red
Red-Green 833 15 Signal Path Yellow 8
Green-Red 8 16 Black
Red-Brown 934 17 Signal Path Green 9
Brown-Red 9 18 Red
Red-Slate 10 35 19 Signal Path Yellow 10
Slate-Red 10 20 Black
Black-Blue 11 36 21 Signal Path Green 11
Blue-Black 11 22 Red
Black-Orange 12 37 23 Signal Path Yellow 12
Orange-Black 12 24 Black
Black-Green 13 38 25 Signal Path Green 13
Green-Black 13 26 Red
Black-Brown 14 39 27 Signal Path Yellow 14
Brown-Black 14 28 Black
Black-Slate 15 40 29 Signal Path Red 15
Slate-Black 15 30 Green
Yellow-Blue 16 41 31 Signal Path Yellow 16
Blue-Yellow 16 32 Black
Yellow-Orange 17 42 33
Orange-Yellow 17 34
Yellow-Green 18 43 35
Green-Yellow 18 36
Yellow-Brown 19 44 37
Brown-Yellow 19 38
Yellow-Slate 20 45 39
Slate-Yellow 20 40
Violet-Blue 21 46 41
Blue-Violet 21 42
Violet-Orange 22 47 43
Orange-Violet 22 44
Violet-Green 23 48 45
Green-Violet 23 46
Violet-Brown 24 49 47
Brown-Violet 24 48
Violet-Slate 25 50 49
Slate-Violet 25 50
8 Connecting The Stations
IMI89–267 Installing The Digital Station Board
The digital station board does not provide station connections on connector pairs
17–25. Remember, you should connect all unused conductors in your house cable
to earth ground.

Detailing Station Call Announce Parameters
The FX system places no limits (other that the distance constraints stated previously) on telephone placement and
arrangement within the system; however, when placing telephones that require call announcing capability,
consider the parameters detailed in the call announce matrix table.
Call Announce Matrix
Call Announce Matrix Table
Receive Call Announcements
Digital
Speaker Digital Monitor Digital Single Line PC Atten. Scout 900MX Industry Standard
Digital
Speaker YES YES NO NO NO NO
Digital
Monitor YES YES NO NO NO NO
Digital
Single Line YES YES NO NO NO NO
PC
Atten. YES YES NO NO NO NO
Scout
900MX YES YES NO NO NO NO
Industry
Standard YES YES NO NO NO NO
Connecting The Stations 9
Installing The Digital Station Board IMI89–267
Originate Call Announcements

Understanding the FX System Logical Numbering
Because there are no dedicated station or line ports in the FX system, the system uses an automatic configuration
method to logically number its stations and lines. Automatic configuration occurs after you perform a master clear
on the system.
How automatic configuration works
With automatic configuration, the system does a search for all installed station and line boards and assigns a logical
number for each provided station and line encountered during the search. The search begins at universal slot 1 and
proceeds through universal slot 6. When automatic configuration is finished, the system has logically numbered all
station and line ports in ascending order from universal slot 1 to universal slot 6.
How logical number and physical location relate to one another
The logical number of a station or line corresponds to its relationship to other stations or lines in the system but is not
dependent upon the board’s placement in the cabinet. The physical location of a station or line corresponds to the order
of the system’s board slots. The cabinet contains universal slots 1–6; therefore, even if the first encountered line board
is located in slot five, the system still assigns logical number one to the first line provided by that board. During
installation, you can skip slots. For example, you can install eight-line, loop start, line boards in only slots one and 6 if
you wish. In this case, slot one yields logical line numbers 1–8 and slot six yields logical line numbers 9–16.
Where you can place circuit boards
Each installed board requires timing circuits equal to its capacity. For example, a 16–station board requires 16 timing
circuits, an eight–line loop start line board requires eight circuits, and a fully configured T1 trunk board requires 24
timing circuits. In the FX system, each universal slot provides 32 timing circuits. Because of this timing circuit
provision of each slot, you can place any station or line board at any slot location with no restrictions.
Adding boards without renumbering
If you install or relocate a station or line board, this board does not operate until you take appropriate programming
action. If you use an available open slot for adding or relocating a board, that board’s stations or lines assume logical
numbers in sequence after the system’s last assigned logical station or line number. For example, if the system’s last
logical station number is 24, the logical numbers of the newly installed board’s stations begin at logical number 25.
After you remove a board and delete it through programming, that board’s logical numbers are available for
reassignment. This means that you can remove a board, add or move another board, take the appropriate programming
action, and have the stations or lines of the added or relocated board assume the logical numbers made available by the
removed board. For example, if the system’s last logical number is 64 and you remove the board providing stations
with logical numbers 1–16 and delete it through programming, the stations on an added board assume logical numbers
beginning with 1 instead of 65. However, if you remove and program delete an eight-station board and add a 16-station
board, the first eight stations stations on the added board assume logical numbers 1–8 and the last eight stations assume
logical numbers 65–72.
Remember, should you master clear the system, the automatic configuration feature logically numbers all station and
line ports in ascending order from the universal slot 1 to universal slot 6 throughout the entire system. This action
renumbers those station and lines provided by boards that you have added or relocated since you last performed the
system master clear.
10 Connecting The Stations
IMI89–267 Installing The Digital Station Board

Testing The Digital Station Installation
Making A Resistance Check
Measure the resistance at the station connector blocks under the following conditions.
•AC power cord disconnected from electrical outlet.
•Common equipment connected to station connector blocks.
•Stations wired and wiring punched down on blocks.
•Bridging clips removed from blocks to isolate stations from common equipment.
Measure the resistance of each installed station and wiring from the station side of the connector blocks.
Resistance values will vary with cable length and station type but should be within the following limits:
✔Greater than 700 Kohms
Measure the resistance of the common equipment and cables from the common equipment side of the station
connector blocks. The resistance value should be within the following limits.
✔40–50 Ohms
Making A Voltage Check
Make the following voltage measurements at the station connector blocks under the following conditions:
•Bridging clips installed
•AC power connected to the common equipment
Measure the voltage across the signal pair. The measured voltage must be within the following limits:
✔28–36 VDC
Causing A Digital Station To Self Test
The multiline stations can be self tested for proper operation per the following instructions:
1. Disconnect line cord at station base.
2. Press and hold 1 for Imact and Impression telephones and MUTE for DigiTech telephones and reconnect line
cord to station connector. Station will automatically perform self test routine.
3. Release test button as soon as test begins. Sequence of test is as follows:
•(a.) Indicators will light in sequence
•(b.) Ringer will sound - be sure volume is set to low or high
•(c.) Indicators and ringer will then turn off at the same time
4. Replace any station that does not pass the self test.
Testing The Digital Station Installation 11
Installing The Digital Station Board IMI89–267

IMI89–267 Installing The Digital Station Board
Charlottesville, Virginia 22901-2829
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