Simplex 4100-6074 User manual

Fiber Optic Modem
Installation Instructions
579-831
Rev. H

©2006-2011 SimplexGrinnell LP. All rights reserved.
Specifications and other information shown were current as of publication and are subject to
change without notice.
Simplex and the Simplex logo are trademarks of Tyco International Ltd. and its affiliates and
are used under license.
All other logos and product names are trademarks or registered trademarks of their respective
companies.
Copyright and Trademarks
Copyright
Trademarks

iv
READ AND SAVE THESE INSTRUCTIONS. Follow the instructions in this installation
manual. These instructions must be followed to avoid damage to this product and associated
equipment. Product operation and reliability depend upon proper installation.
DO NOT INSTALL ANY SIMPLEX®PRODUCT THAT APPEARS DAMAGED.Upon
unpacking your Simplex product, inspect the contents of the carton for shipping damage. If
damage is apparent, immediately file a claim with the carrier and notify an authorized Simplex
product supplier.
ELECTRICAL HAZARD -Disconnect electrical field power when making any internal
adjustments or repairs. All repairs should be performed by a representative or authorized agent of
your local Simplex product supplier.
STATIC HAZARD - Static electricity can damage components. Handle as follows:
•Ground yourself before opening or installing components.
•Prior to installation, keep components wrapped in anti-static material at all times.
EYE SAFETY HAZARD -Under certain fiber optic application conditions, the optical output of
this device may exceed eye safety limits. Do not use magnification (such as a microscope or other
focusing equipment) when viewing the output of this device.
FCC RULES AND REGULATIONS – PART 15 - This equipment has been tested and found
to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful interference when the
equipment is operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in
a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.
SYSTEM REACCEPTANCE TEST AFTER SOFTWARE CHANGES -To ensure proper
system operation, this product must be tested in accordance with NFPA 72® after any
programming operation or change in site-specific software. Reacceptance testing is required after
any change, addition or deletion of system components, or after any modification, repair or
adjustment to system hardware or wiring.
All components, circuits, system operations, or software functions, known to be affected by a
change, must be 100% tested. In addition, to ensure that other operations are not inadvertently
affected, at least 10% of initiating devices that are not directly affected by the change, up to a
maximum of 50 devices, must also be tested and proper system operation verified.
NFPA 72® is a registered trademark of the National Fire Protection Association.
Cautions and Warnings

v
Introduction to the Fiber Optic Modem ........................................................... 1
General Overview........................................................................................ 1
Definitions and Terms.................................................................................. 1
Digital Audio Riser Overview ..................................................................... 2
Analog Audio Riser Overview..................................................................... 2
4120 Network Overview.............................................................................. 2
RUI Overview.............................................................................................. 2
Fiber Modem Audio Expansion Board ........................................................ 2
Illustration.................................................................................................... 3
PID List........................................................................................................ 4
Specifications............................................................................................... 4
Modem Configuration...................................................................................... 6
Supported Configurations............................................................................ 6
SW1 (RUI/4120 Network) Configuration Settings...................................... 6
SW2 (Digital Audio Riser, Enhanced Analog Audio, and Standard
Analog Audio Channel 1) Configuration Settings....................................... 7
SW3 (Analog Audio Channel 2) Configuration Settings............................. 8
SW4 (Fiber Modem Audio Expansion Board) Configuration Settings........ 8
4120 Network Wiring, Analog Audio, and RUI Jumper Placements .......... 9
Fiber Modem Audio Expansion Board.......................................................... 10
Description................................................................................................. 10
Jumper Configuration ................................................................................ 10
Mounting........................................................................................................ 11
Mounting Instructions................................................................................ 11
Wiring............................................................................................................ 14
Overview.................................................................................................... 14
Fiber Connection........................................................................................ 14
4120 Network Wiring Specifications......................................................... 15
Analog Audio Riser Wiring Specifications................................................ 17
Enhanced Analog Audio (EAA) Riser Wiring Specifications................... 19
Digital Audio Riser Specifications............................................................. 21
RUI Wiring Specifications......................................................................... 22
Fiber Modem Audio Expansion Board Wiring Specifications................... 24
Connecting Power to the Modem................................................................... 25
Where to Connect Power ........................................................................... 25
Testing and Troubleshooting ......................................................................... 27
General....................................................................................................... 27
LED Indications......................................................................................... 28
Fiber Fault LED......................................................................................... 28
Digital Audio Riser (DAR)........................................................................ 28
Analog Audio............................................................................................. 29
4120 Network ............................................................................................ 29
RUI ............................................................................................................ 29
System Checkout ....................................................................................... 29
Testing Circuit Supervision ....................................................................... 30
Appendix – Sample Configurations............................................................... 31
Overview.................................................................................................... 31
Internal Building or Multi-Building Configuration – Class A/Style 7
or Style 6.................................................................................................... 31
RUI (excluding 4120 Network) Class A/Style 7........................................ 32
4120 Network (excluding RUI) Class A/Style 7........................................ 33
Analog Audio Class A/Style 6................................................................... 34
Enhanced Analog Audio (EAA) (limited to Channel 1 & excluding
Digital Audio) Class A/Style 6 .................................................................. 35
Digital Audio (excluding Analog Audio Channel 1) Class A/Style 7........ 36
Internal Building or Multi-Building Configuration – Class B/Style 4....... 37
RUI (Excluding 4120 Network) Class B/Style 4 ....................................... 38
Contents

vi
Analog Audio Class B/Style 4 .................................................................. 39
Enhanced Analog Audio (EAA) (limited to Channel 1 & excluding
Digital Audio) Class B/Style 4................................................................... 40
Digital Audio (excluding Analog Audio Channel 1) Class B/Style 4........ 41
Hub Configuration Overview..................................................................... 42
Hub Configuration – 4120 Network .......................................................... 43
Hub Configuration – Analog Audio........................................................... 44
Hub Configuration – Digital Audio ........................................................... 45
Interconnected Loop and Star Configurations – Overview........................ 46
Interconnected Loop and Star Configurations –4120 Network.................. 47
Interconnected Loop and Star Configurations – Analog Audio................. 48
Interconnected Loop and Star Configurations – Digital Audio.................. 49
TrueSite Workstation (TSW)..................................................................... 50
Fiber Modem Audio Expansion Board Class A/Style 6............................. 51
Fiber Modem Audio Expansion Board Class B/Style 4............................. 52

1
The Fiber Optic Modem is used to simplify field wiring and increase transmission distances by
converting system copper-wired interfaces to fiber optic connections. It has field wiring
connections for the Digital Audio Riser, Analog Audio Risers, RUI, and 4120 Network. A
Modem pair replaces copper wiring between any two points including node-to-node,
node-to-transponder, and transponder-to-transponder. The Modem is invisible to the connected
equipment, and does not need to be programmed in as part of the job (except for power supply
current calculations). The Modem combines the input signals so they can be communicated over
one fiber in both directions.
In general, the Modem installation is accomplished by simply connecting the wires that would
normally be routed between cabinets to the Modem. The only additional steps required when
using a Modem rather than copper are:
1) Configuring the DIP switches and jumpers according to the application.
2) Routing the “x-link” wire if the system has Class A Analog Audio or Class A RUI.
Modems are always installed in pairs. There are four versions: a “right-port” and “left-port”
version for each type of fiber; left and right for single-mode and a left and right for multimode.
Any Modem link must consist of one of each type. The order in which Modem pairs are installed
is arbitrary. A “left-to-right” Modem pair can be followed by another “left-to-right” pair, or by a
“right-to-left” pair.
Enhanced Analog Audio (EAA): EAA refers to a reformatted version of the Analog Audio Riser
that is wired between modems. In an EAA system, modems pass the Riser to the next modem as a
digital signal via the DAR channel. EAA disallows the use of Analog Channel 2.
Generic: A “Generic” modem is any modem that is not a Head-End or Tail-End modem. In a
Class B configuration, all modems are generic.
Head end: A “Head-End” modem is a modem with an electrical connection to the primary side of
the head-end cabinet. If there are any fiber optic links between a modem and the head-end
cabinet, then that modem is not a head-end modem. A modem with additional nodes or
transponders between itself and the head-end cabinet, but no optical links, can still be a head-end
modem.
Local side: The “local side” of any configuration refers to all portions of the wiring loop that are
electrically connected to the head-end cabinet. Any wiring that is isolated from the head end via
one or more optical links is not electrically connected, and therefore considered “remote.”
NIC: Network Interface Card.
Remote side: The “remote side” of any configuration refers to all portions of the wiring loop that
are not electrically connected to the head-end cabinet. Any system that is electrically connected to
the head end (no optical links) is considered “local.”
RIC: Riser Interface Card.
Tail end: A “Tail-End” modem is a modem with an electrical connection to the secondary side
(also known as a Class A return) of the head-end cabinet. If there are any fiber optic links
between a modem and the head-end cabinet, then that modem is not considered a tail-end modem.
A modem with additional nodes or transponders between itself and the head end, but no optical
links, can still be a tail-end modem.
X-link: The “x-link” is a pair of RUI or Analog Audio Riser wires that connect head-end and tail-
end modems to one another. The link is required to maintain an electrical connection between the
primary and secondary sides of the local-side wiring loop. (X-link definition is continued on the
next page.)
Continued on next page
Introduction to the Fiber Optic Modem
General Overview
Definitions and
Terms

2
X-link (continued): X-link connections are only required in Class A Analog Audio and Class A
RUI configurations. They are not required for the Digital Audio Riser interface, a Network
interface, or for any other Class B configuration. Where required, the x-link connection maintains
Class A supervision even though the remote side of the fiber link is electrically isolated. The x-
link is only wired between the two modems that are electrically connected to the head-end cabinet
via RUI or riser wiring. (It is still considered electrically connected even if there are transponders
between the modem and the head-end cabinet).
The Modem replaces copper wiring between a Digital Audio Controller and a Digital Audio Riser
Interface Card, or between Digital Audio Riser Interface cards. Modem connections can be used
between transponders, or between nodes in Network systems.
The Modem replaces copper wiring between an Analog Audio Controller and an Analog Audio
Riser Interface Card, or between Analog Audio Riser Interface cards. Modem connections can be
used between transponders, or between nodes in network systems. The Modem can be configured
for 10 Vrms audio risers (standard), 1 V peak-to-peak audio risers, or 0.707 Vrms.
The standard analog audio usage of the fiber modem imposes a 6-modem-pair limit on system
size. The Enhanced Analog Audio (EAA) feature removes this limitation by keeping a version of
the analog stream digital through the wired link. Using EAA imposes other limitations, however,
that include the following:
•Limitation to one analog channel only (Channel 1).
•Requires that the EAA wire (connected to DAR terminals) be close nippled (since it is
unsupervised).
•Excludes the usage of the DAR interface for the Digital Audio Riser because the DAR
interface is used as the EAA channel.
The Modem can replace either one or two wired connections between Network Interface Cards. It
can replace the right-port wire, the left-port wire, or both. The Network Interface Cards that the
Modem will connect to must have wired media cards installed. The Modem can be used to replace
wiring between any two NICs, and it can also be used in lieu of a Physical Bridge. When the
Modem is used in lieu of a Physical Bridge, the network topology appears as a typical ring
configuration since the Modem effectively replaces two wires between the local and remote node.
Refer to Figure A-18 that shows an Interconnected Loop without a Physical Bridge. The
Interconnected Loop normally requires a Physical Bridge but doesn’t in this diagram because
modems are used.
Note that references to 4020, 4120, and 4100 Legacy Fire Alarm Panel systems are for retrofit
applications only. None of these Fire Alarm System models have been listed to the Ninth Edition
of UL864.
The Modem replaces copper wiring between a CPU Motherboard and Transponder Interface card,
between Transponder Interface cards, or between a RUI card and Transponder Interface card.
Maximum of eight pairs of Modems for RUI if wired Class A.
The Audio Expansion Board allows the Fiber Optic Modem to interface with 4100 Legacy Audio
systems. The card has two channels, each of which are selectable for 70 Vrms or 25 Vrms risers.
The card converts the 70 Vrms or 25 Vrms to a 10 Vrms signal to be used by the modem. The
card connects to the modem via a ribbon harness.
Introduction to the Fiber Optic Modem, Continued
Definitions and
Terms
Digital Audio Riser
Overview
Analog Audio Riser
Overview
4120 Network
Overview
RUI Overview
Fiber Modem Audio
Expansion Board

3
AUDIO RISER
CHANNEL 2 LEVEL
SELECT
4120 NETWORK
WIRE GAUGE
SELECT
EXPANSION
SWITCH
4120 NETWORK & RUI
INTERFACE CONFIGURATION
DIGITAL AUDIO RISER AND
ANALOG RISER CHANNEL 1
CONFIGURATION
ANALOG RISER CHANNEL 2
CONFIGURATION
FIBER OPTIC ST
CONNECTOR
24V POWER
CONNECTION
OPTIONS
Fiber
transceiver
EXPANSION
HEADER
TB2
P6 P5
P3
SW1 SW2 SW3
SW4
LED2 LED1 LED4 LED5
LED3
P7 P8
P10
P9
P2
LED6LED8
LED10LED9 LED7
TB1
RUI HEAD-END
SELECT / X-LINK
DISABLE
See Figure 1 (below) for important locations on the Modem board.
Figure 1. Fiber Optic Modem Board
Introduction to the Fiber Optic Modem, Continued
Illustration

4
This publication covers the following Product IDs (PIDs):
Table 1. Product IDs Covered by this Publication
Multimode Fiber Part Numbers
PID Description Usage
4100-6074 Fiber Optic Modem Left-Port Assembly 4100U/4100ES Bay Installation
4100-6075 Fiber Optic Modem Right-Port Assembly 4100U/4100ES Bay Installation
4190-9024 Fiber Optic Modem with Expansion Cabinet Assembly - Red Expansion to 4100ES, 4100U, 4100, 4010,
4010ES or 4020
4190-9025 Fiber Optic Modem with Expansion Cabinet Assembly - Beige Expansion to 4100ES, 4100U, 4100, 4010,
4010ES or 4020
4190-9026 Fiber Optic Modem Right-Port Assembly (For Expansion
Cabinet Only) Expansion Cabinet Installation
Single-mode Fiber Part Numbers
PID Description Usage
4100-6072 Fiber Optic Modem Left-Port Assembly 4100U/4100ES Bay Installation
4100-6073 Fiber Optic Modem Right-Port Assembly 4100U/4100ES Bay Installation
4190-9021 Fiber Optic Modem with Expansion Cabinet Assembly - Red Expansion to 4100ES, 4100U, 4100, 4010,
4010ES or 4020
4190-9022 Fiber Optic Modem with Expansion Cabinet Assembly - Beige Expansion to 4100ES, 4100U, 4100, 4010,
4010ES or 4020
4190-9023 Fiber Optic Modem Right-Port Assembly (For Expansion
Cabinet Only) Expansion Cabinet Installation
Other Part Numbers
PID Description Usage
4100-9840 Remote Box Modem Mounting Bracket 4100 Cabinet or Generic Expansion Cabinet
4100-9841 Fiber Modem Audio Expansion Board with 4100 Mounting
Bracket 4100 Bay Installation
4100-9842 Fiber Modem Audio Expansion Board 4100 Installation (Mounts on Bracket Shipped
with 4100-9841)
4190-9018 Fiber Modem Audio Expansion Board (For Expansion Cabinet
Only) Expansion Cabinet Installation
The two versions of each type of Modem assembly (“left” and “right”-port versions) both transmit
and receive simultaneously on two different wavelengths over a single fiber. Fiber connects to the
Modem using standard ST-type connectors.
Continued on next page
Introduction to the Fiber Optic Modem, Continued
PID List
Specifications

5
Table 2 lists specifications for the Fiber Optic Modems and the Audio Expansion Board.
Table 2. Fiber Optic Modem Specifications
Current/Voltage Requirements
Card Current @ 24 VDC Analog Channels in Use (Standby or Alarm): 360 mA Analog Channels Disabled (Standby or Alarm): 190 mA
Fiber Modem Audio Expansion Board (Standby or Alarm): 20 mA
Card Voltage 18-33 VDC
Optical Specifications
Transmitting and Receiving Left-Port: 1310 nm transmit; 1550 nm receive
Right-Port: 1550 nm transmit; 1310 nm receive
Link Distances
Single-Mode Fiber: Maximum total attenuation: 15 dB
Example 1: fiber attenuation of 0.34 dB/km
over 35,000 feet (10.7 km) = 3.6 dB, connectors totaling
6 dB, safety margin remaining of 5 dB
Example 2: fiber attenuation of 0.6 dB/km over
25,000 feet (7.7 km) = 4.6 dB, connectors totaling 5 dB,
safety margin remaining of 5 dB
Connectors: No limit specified
Multi-Mode Fiber: 5,000 feet (1.6 km) maximum (50 um or 62.5 um GRIN).
Maximum total attenuation: 6 dB
Connectors: Three or less (in addition to the connections to the
modems)
NOTE: Single-mode fiber is preferred. Attenuation should be measured at 1310 nm.
Environmental Specifications
Operating Temperature 32°to 120°F (0°to 49°C)
Humidity Up to 93% relative humidity at 90°F (32°C), non-condensing
An initial acceptance test of each fiber link shall be performed as stated in NFPA 72. A fiber link
is defined as all fiber segments, including patch cords, which create a fiber path from one modem
to another. The fiber lines shall be tested using an OTDR. The OTDR will measure the attenuation
of the fiber as well as indicate the presence and location of connectors and any defects in the link.
The fiber infrastructure shall be accepted for use only after it has been determined that it meets or
exceeds industry standards (TIA/EIA 568).
Introduction to the Fiber Optic Modem, Continued
Specifications

6
The allowed application configurations for the Modem are as follows:
Configuration #1 – Digital Audio Riser, Analog Riser #2, and Network.
Configuration #2 – Digital Audio Riser, Analog Riser #2, and RUI.
Configuration #3 – Both Analog Risers and Network.
Configuration #4 – Both Analog Risers and RUI.
The configurations listed are the fully-loaded configurations only. In addition to these
configurations, any combination can be reduced as required. For example, the Digital Audio Riser
can be used in conjunction with RUI only, or all by itself, or the 4120 Network can be used by
itself, etc. Each component of these configurations is completely independent of one another.
Each of the wired interfaces to the Modem is configured independently of one another. Refer to
the “Sample configurations” section (in the Appendix at the rear of this publication) for diagrams
of some sample configurations, and additional information on configuring the Modem.
SW1 selects between the 4120 Network and RUI, and configures each interface according to how
the modem will be used. If you are not using either of these interfaces, then set SW1 to 4120
Network (position 5 OFF). See Table 3 for settings and Figure 1 for the switch location on the
modem board.
Table 3. SW1 Switch Settings
Position Description ON OFF Interface
*1 RUI media wiring type Class A Class B
RUI
*2 RUI media default mode TIC RUI
*3 RUI media generic select Not Generic Generic
*4 RUI media location select Tail End Head End
*5 Comm media selection RUI enable 4120 Network
enable
†6 4120 Network protocol 8-Bit 9-Bit 4120†7 4120 Network baud rate 9600 Baud 57.6K
8 4120 Network Invalid 4120 Network
Modem Configuration
Supported
Configurations
SW1 (RUI/4120
Network)
Configuration
Settings
RUI Notes
*1 Set this switch to ON if the Modem is part of a Class A RUI loop. Set this switch to OFF if the Modem is wired Class B.
*2 Set this switch to ON if the Modem is on the primary side of a Modem pair. Set this switch to OFF if the Modem is on the secondary
side of a Modem pair. If the Modem is a Head-End or Tail-End Modem, then always set the switch to ON.
*3 Set to ON if the Modem is a Head-End or Tail-End Modem. Set to OFF if the Modem is on the remote side of a wiring loop (isolated
from the CPU motherboard or RUI card via an optical link or Modem pair (fiber).
*4 Set to ON if the Modem is connected to the secondary of the 4100U/4100ES motherboard (or RUI card) because it’s then
considered a Tail-End Modem. If there are additional transponders between the Modem and the secondary of 4100U/4100ES
motherboard (or RUI card), but no additional fiber links, then it’s still a Tail-End Modem and should have the switch set to ON. Set
the switch to OFF if the Modem is connected to the primary of the 4100U/4100ES motherboard (or RUI card) because it’s then
considered a Head-End” Modem. If there are additional transponders between the Modem and the primary of the 4100U/4100ES
motherboard (or RUI card), but no additional fiber links, then it’s still a Head-End Modem and should have the switch set to OFF. If
the Modem is neither a Head-End nor a Tail-End Modem, then it is a “generic” Modem for which the switch setting does not matter.
Comm Media Selection Notes
*5 Set to OFF if the 4120 Network interface is being used, ON if the RUI interface is being used, and OFF if neither RUI nor 4120
network interface is being used.
4120 Network Notes
†6 Set 4120 Network protocol (8 or 9 bits) to match all connected Network Interface Cards.
†7 Set 4120 Network baud rate (9600 or 57.6 K) to match all connected Network Interface Cards.

7
SW2 controls the Digital Audio Riser (DAR) enable status, controls Enhanced Analog Audio, and
configures Channel 1 for the Standard Analog Audio Riser. See Table 4 for settings and Figure 1
for the switch location on the modem board.
Table 4. SW2 Switch Settings
Position Description ON OFF Interface
*1 Analog Riser Channel 1
wiring Class A Class B
Standard
Analog
*2 Analog Riser Channel 1
default mode Riser Interface Audio Controller
*3 Analog Riser Channel 1
generic select Not Generic Generic
*4 Analog Riser Channel 1
location select Tail End Head End
*5 Analog Riser Channel 1
enable Enable Disable
†6 Enhanced Analog Audio
wired Wired Not Wired Enhanced
Analog
†7 Enhanced Analog Audio
enable Enable Disable
†8 DAR enable Enable Disable Digital
Modem Configuration, Continued
SW2 (Digital Audio
Riser, Enhanced
Analog Audio, and
Standard Analog
Audio Channel 1)
Configuration
Settings
Standard Analog Audio Notes
*1 Set this switch to ON if the Modem is part of a Class A Riser loop. Set this switch to OFF if the Modem is
wired Class B
*2 Set this switch to ON if the Modem is on the primary side of a Modem pair. Set this switch to OFF if the
Modem is on the secondary side of a Modem pair. If the Modem is a Head-End or Tail-End Modem, then
always set the switch to ON
*3 Set this switch to ON if the Modem is a Head-End or Tail-End Modem. Set to OFF if the Modem is isolated
from the Audio Controller card via an optical link or Modem pair (fiber).
*4 Set this switch to ON if the Modem is connected to the secondary of the Audio Controller because it’s then
considered a Tail-End Modem. If there are additional transponders between the Modem and the secondary
of the Audio Controller, but no additional fiber links, then it’s still a Tail-End Modem and should have the
switch set to ON. Set to OFF if the Modem is connected to the primary of the Audio Controller because it’s
then considered a Head-End” Modem. If there are additional transponders between the Modem and the
primary of the Audio Controller, but no additional fiber links, then it’s still a Head-End Modem and should have
the switch set to OFF. If the Modem is neither a Head-End nor a Tail-End Modem, then it is a “generic”
Modem for which the switch setting does not matter.
*5 Set this switch to ON if that riser channel interface is to be used.
Enhanced Analog Audio Notes
†6 Set this switch to ON if the modem is passing the EAA over the DAR channel in an EAA system. Set this
switch to OFF for all other conditions.
†7 Set this switch to ON if EAA is to be used.
Digital Audio Notes
†8 Set this switch to ON if the Digital Audio Riser interface is to be used.

8
SW3 configures Channel 2 of the Analog Audio Riser. See Table 5 for settings and Figure 1 for
the switch location on the modem board.
Table 5. SW3 Switch Settings
Position Description ON OFF Interface
*1 Analog Riser Channel 2
wiring Class A Class B
Standard
Analog
*2 Analog Riser Channel 2
default mode Riser Interface Audio Controller
*3 Analog Riser Channel 2
generic select Not Generic Generic
*4 Analog Riser Channel 2
location select Tail End Head End
*5 Analog Riser Channel 2
enable Enable Disable
6 Spare - -
7 Spare - -
8 Spare - -
SW4 configures Fiber Modem Audio Expansion Board. See Table 6 for settings and Figure 1 for
the switch location on the modem board.
Table 6. SW4 Switch Settings
Position Description ON OFF Interface
1 4100 Audio Expansion Enable Disable
4100 Audio
2 Spare - -
3 Spare - -
4 Spare - -
5 Spare - -
6 Spare - -
7 Spare - -
8 Spare - -
Modem Configuration, Continued
SW3 (Analog Audio
Channel 2)
Configuration
Settings
SW4 (Fiber Modem
Audio Expansion
Board) Configuration
Settings
Standard Analog Audio Notes
*1 Set this switch to ON if the Modem is part of a Class A Riser loop. Set this switch to OFF if the Modem is
wired Class B
*2 Set this switch to ON if the Modem is on the primary side of a Modem pair. Set this switch to OFF if the
Modem is on the secondary side of a Modem pair. If the Modem is a Head-End or Tail-End Modem, then
always set the switch to ON
*3 Set this switch to ON if the Modem is a Head-End or Tail-End Modem. Set to OFF if the Modem is isolated
from the Audio Controller card via an optical link or Modem pair (fiber).
*4 Set this switch to ON if the Modem is connected to the secondary of the Audio Controller because it’s then
considered a Tail-End Modem. If there are additional transponders between the Modem and the secondary
of the Audio Controller, but no additional fiber links, then it’s still a Tail-End Modem and should have the
switch set to ON. Set to OFF if the Modem is connected to the primary of the Audio Controller because it’s
then considered a Head-End” Modem. If there are additional transponders between the Modem and the
primary of the Audio Controller, but no additional fiber links, then it’s still a Head-End Modem and should
have the switch set to OFF. If the Modem is neither a Head-End nor a Tail-End Modem, then it is a “generic”
Modem for which the switch setting does not matter.
*5 Set this switch to ON if that riser channel interface is to be used.

9
Jumper P2 configures the 4120 Network Interface according to the wire gauge to be used. Jumper
P5 configures the output level & Jumper P6 configures the input level of the Channel 2 Audio
Riser Interface. Jumpers P7 & P8 are RUI jumpers that can disable the x-link on a head-end
modem. See Tables 7, 8, & 9 for jumper placements and Figure 1 for jumper locations on the
modem board.
Table 7. 4120 Network Jumper Placements
Jumper Description Position
1-2 Position 3-4 Position 5-6 Position 7-8 Interface
*P2
4120 Network Wiring - 18
Gauge (0.8231 mm2) X - X X
4120
4120 Network Wiring - 24
Gauge (0.2047 mm2) No jumper placements
Table 8. Analog Audio Output Level Jumper Placements
Jumper Description Position
1-2 Position 2-3 Interface
P5
Analog Riser Output Level -
Channel 2 (1 Vp-p) X -
Analog
Audio
Analog Riser Output Level -
Channel 2 (0.707 Vrms) - X
Analog Riser Output Level -
Channel 2 (Standard 10 Vrms) - -
Table 9. Analog Audio Input Level Jumper Placements
Jumper Description Position
1-2 Position 2-3 Interface
P6
Analog Riser Input Level –
Channel 2 (1 Vp-p) X -
Analog
Audio
Analog Riser Input Level –
Channel 2 (0.707 Vrms) - X
Analog Riser Input Level –
Channel 2 (Standard 10 Vrms) - -
Table 10. RUI Jumper Placements
Jumper Description Position
1-2 Position 2-3 Interface
*P7 & P8 RUI/X-Link (Default) X - RUI
**P7 & P8 RUI/X-Link (Head-End Modem in
Class A) - X
Modem Configuration, Continued
4120 Network
Wiring, Analog
Audio, and RUI
Jumper Placements
*Place Jumper P2 according to the wire gauge to be used. Note that 24-Gauge (0.2047 mm
2
) wiring does not require any jumpers.
*Jumpers P7 and P8 should always be in their default position (Position 1-2) except on a head-end modem in a Class A
wiring loop
**For a head-end modem in Class A only, place Jumpers P7 and P8 in Position 2-3.

10
The Fiber Modem Audio Expansion Board is a module that allows the modem to interface to a
4100 audio system. It attaches to the Fiber Modem via a ribbon cable and riser wires. The 4100
audio system uses 25 or 70.7 Vrms risers. The expansion board converts these levels to 10 Vrms
risers for use on the Fiber Modem.
The Audio Expansion Board mounts in either a 4100 cabinet on its mounting bracket, or in the
Fiber Modem Expansion Cabinet (refer to Figure 5 and Table 1 for details). The module wires to
a 4100-style signal card in either Class A or B configurations, or directly to the amplifier's output
in Class A only. Refer to Figure 12 for wiring details of the expansion board. All wiring from the
expansion board must be close nippled.
Figure 2. Fiber Modem Audio Expansion Board
Configure the jumpers on the Fiber Modem Audio Expansion Board according to Table 11.
Table 11. Riser Level Selection Jumper Placements
Jumper Description Position 1-2 Position 3-4 Position 5-6
P1 Riser 2 level select 70.7 Vrms 25 Vrms Not used
P2 Riser 1 level select 70.7 Vrms 25 Vrms Not used
Fiber Modem Audio Expansion Board
Description
Jumper
Configuration
TB1 TB2
P1 P2
P3
Modem riser
connections
4100 riser
connections
Riser 1 level
selection
Riser 2 level
selection
Modem control
harness connection

11
The modem must always be mounted in a 4100U or 4100ES main panel, transponder cabinet,
4100 cabinet, Remote Expansion Cabinet (4190-9021, -9022, -9024, -9025), or any other close-
nippled cabinet. It is either installed in the same manner as other standard panel 4-inch (102 mm)
X 11-inch (279 mm) option cards (except that there is no PDI connection), or mounted using the
mounting plate in the 4100 or any other close-nippled cabinet. In either the case, you must install
the modem with the fiber optic transceiver pointing down so as to provide proper airflow to the
heat sinks. See Figure 3.
The Remote Expansion Cabinet is required when the modem is used with a 4010, 4010ES or 4020
(Network Communications only application). When the modem is used with a 4100, 4100U or
4100ES system, the expansion cabinet can be used if space within the system box does not permit
the installation of the modem(s) in the main cabinet. In any case, the modem must be close
nippled to its host cabinet.
In contrast, the Modem Audio Expansion Board can only be mounted in an Expansion Cabinet, in
a 4100 bay using the mounting plate, or close nippled in a transponder cabinet.
Figure 3. Modem Card Mounting in a 4100U, 4100ES or Transponder Cabinet
Continued on next page
Mounting
Mounting
Instructions
WASHERS
STANDOFFS
MODEM CARD
#6 SCREWS
FIBER OPTIC
TRANSCEIVER

12
The Remote Expansion Cabinet (4190-9021, -9022, -9024, -9025) comes supplied with a Fiber
Optic Modem Left-Port Assembly (4100-6072, -6074) and all necessary mounting hardware.
Other boards like the Audio Expansion Board (4100-9842) are optional.
To mount the modem in a Remote Expansion Cabinet with selected board options, refer to
Figure 4.
4100-9015 (RED) OR - 9016 (BEIGE)
REMOTE FIBER MODEM ASSEMBLY, RED
4190-9018 FIBER MODEM AUDIO
EXPANSION BOARD (OPTIONAL)
FIBER MODEM,
LEFT PORT ASSEMBLY
(PART OF 4100-9015, -9016
ASSEMBLY)
4190-9017 FIBER MODEM ASSEMBLY,
RIGHT PORT (OPTIONAL)
REMOTE BOX MOUNTING BRACKET
(PART OF 4100-9015, -9016 ASSEMBLY)
EXPANSION CABINET
(PART OF 4100-9015, -9016
ASSEMBLY)
Figure 4. Modem and Audio Expansion Board Mounting in a 4190 Remote
Expansion Cabinet
Continued on next page
Mounting, Continued
Mounting
Instructions
REMOTE FIBER MODEM ASSEMBLY EXPANSION CABINET (PART
OF REMOTE FIBER MODEM
ASSEMBLY)
FIBER MODEM, LEFT
PORT ASSEMBLY
(PART OF REMOTE
FIBER MODEM
ASSEMBLY)
4190-9023, 9026 FIBER
MODEM ASSEMBLY, RIGHT
PORT (OPTIONAL)
REMOTE BOX MOUNTING
BRACKET (PART OF REMOTE
FIBER MODEM ASSEMBLY)

13
To add a fiber modem audio expansion board to a 4100, see Figure 5. When mounting in any
other cabinet, attach mounting plate to enclosure using self-tapping screws or equivalent. Mount
the bracket first before mounting the modem and expansion board to the bracket. No standoffs are
required. For the two nylon supports posts shipped with the modem, replace them with the posts
shipped with the bracket.
Figure 5. Modem and Audio Expansion Board Mounting in a 4100 Cabinet or
Transponder Cabinet
Mounting, Continued
Mounting
Instructions
MODEM CARD
MODEM AUDIO
EXPANSION BOARD
(PART OF 4100-9841)
4100 MOUNTING
BRACKET
(PART OF 4100-9841)
4100-9840
MOUNTING PLATE
(FOR USE IN 4100
OR OTHER CLOSE-
NIPPLED CABINET)

14
All Modem wiring is supervised and power-limited.
The following Modem wiring must be within a system box or close-nippled to a system box:
•Digital Audio Riser
•24V Card Power
•4120 Network Left Port
•Analog Audio Risers
•RUI
The following Modem wiring is allowed to be routed external to a system box:
•4120 Network Right Port
•Analog Audio Riser X-link
•RUI X-link
The remainder of this section covers the actual fiber connection and then details wiring
specifications with accompanying wiring diagrams for the 4120 Network, Analog Audio Riser,
Digital Audio Riser (DAR), and RUI.
Note: Ferrite beads are required where the DAR, 4120 Network, and RUI wiring
enters or exits a system box. Except for the 4120 Network Right Port and
the RUI X-Link, ferrite beads for all wires are supplied with their respective
equipment. Ferrite beads for the RUI X-Link and the 4120 Network Right
Port are supplied with the modem (Ferrite Bead Kit Part No. 742-940.)
The fiber optic cable uses a standard ST connector. When mating the connector to the Modem, be
sure to align the connector’s key properly to avoid any undue stress to the Modem.
Caution: The fiber optic cable can be damaged easily. To prevent permanent damage to
the fiber, avoid bending radii smaller than 1.5 inches (38 mm), or as specified
for your particular fiber optic cable.
Wiring
Overview
Fiber Connection
Figure 6. Loop wires through bead as shown