FEM/FEM4
Advanced FE/E1
Fiber Converters
User and Installation Guide
Version: 1.6
FibroLAN Ltd.
6 Hayezira St., P.O. Box 544 Yokneam-Illit, 20692 ISRAEL
Tel: 972-4-9591717 Fax: 972-4-9591718
e-mail: [email protected] web site: www.fibrolan.com
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FEDERAL COMMUNICATIONS COMMISSION
AND
CANADIAN DEPARTMENT OF COMMUNICATIONS
RADIO FREQUENCY INTERFERENCE STATEMENTS
This equipment generates, uses, and can radiate radio frequency energy and if
not installed and used properly, that is, in strict accordance with the
manufacturer’s instructions, may cause interference to radio communication. It
has been tested and found to comply with the limits for a Class A computing
device in accordance with the specifications in Subpart B of Part 15 of FCC
rules, which are designed to provide reasonable protection against such
interference when the equipment is operated in a commercial environment.
Operation of this equipment in a residential area is likely to cause interference,
in which case the user at his own expense will be required to take whatever
measures may be necessary to correct the interference.
Changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
This digital apparatus does not exceed the Class A limits for radio noise
emission from digital apparatus set out in the Radio Interference Regulation of
the Canadian Department of Communications.
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites
applicables aux appareils numériques de la classe A prescrites dans le Règlement sur le
brouillage radioélectrique publié par le ministère des Communications du Canada.
CE Mark
The CE mark symbolizes compliance with the European Community
required technical standards.
The product herewith complies with the requirements of the EMC Directive
89/336/EEC, the Low Voltage Directive 73/23/EEC and the R&TTE
Directive 99/5/EC.
The product was tested in a typical configuration.
Levy Malkiely
Manager Quality
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Normas Oficiales Mexicanas (NOM)
Electrical Safety Statement
INSTRUCCIONES DE SEGURIDAD
1. Todas las instrucciones de seguridad y operación deberán ser leídas antes de que el aparato eléctrico sea
operado.
2. Las instrucciones de seguridad y operación deberán ser guardadas para referencia futura.
3. Todas las advertencias en el aparato eléctrico y en sus instrucciones de operación deben ser respetadas.
4. Todas las instrucciones de operación y uso deben ser seguidas.
5. El aparato eléctrico no deberá ser usado cerca del agua—por ejemplo, cerca de la tina de baño, lavabo,
sótano mojado o cerca de una alberca, etc.
6. El aparato eléctrico debe ser usado únicamente con carritos o pedestales que sean recomendados por el
fabricante.
7. El aparato eléctrico debe ser montado a la pared o al techo sólo como sea recomendado por el fabricante.
8. Servicio—El usuario no debe intentar dar servicio al equipo eléctrico más allá a lo descrito en las
instrucciones de operación. Todo otro servicio deberá ser referido a personal de servicio calificado.
9. El aparato eléctrico debe ser situado de tal manera que su posición no interfiera su uso. La colocación del
aparato eléctrico sobre una cama, sofá, alfombra o superficie similar puede bloquea la ventilación, no se
debe colocar en libreros o gabinetes que impidan el flujo de aire por los orificios de ventilación.
10. El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores, registros de
calor, estufas u otros aparatos (incluyendo amplificadores) que producen calor.
11. El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de
operación, o como se indique en el aparato.
12. Precaución debe ser tomada de tal manera que la tierra fisica y la polarización del equipo no sea eliminada.
13. Los cables de la fuente de poder deben ser guiados de tal manera que no sean pisados ni pellizcados por
objetos colocados sobre o contra ellos, poniendo particular atención a los contactos y receptáculos donde
salen del aparato.
14. El equipo eléctrico debe ser limpiado únicamente de acuerdo a las recomendaciones del fabricante.
15. En caso de existir, una antena externa deberá ser localizada lejos de las lineas de energia.
16. El cable de corriente deberá ser desconectado del cuando el equipo no sea usado por un largo periodo de
tiempo.
17. Cuidado debe ser tomado de tal manera que objectos liquidos no sean derramados sobre la cubierta u
orificios de ventilación.
18. Servicio por personal calificado deberá ser provisto cuando:
A: El cable de poder o el contacto ha sido dañado; u
B: Objectos han caído o líquido ha sido derramado dentro del aparato; o
C: El aparato ha sido expuesto a la lluvia; o
D: El aparato parece no operar normalmente o muestra un cambio en su desempeño; o
E: El aparato ha sido tirado o su cubierta ha sido dañada.
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List of contents
Overview page 5
Planning your network with FEM page 6
Content of the shipping container page 10
Product general description page 10
Features Summary page 11
Front Panel page 13
Far End Fault Feature page 14
Link Loss on E1 port page 15
Installation procedures page 16
Power connection page 16
F/O connection page 18
F/O port specifications page 19
TP cable connection page 19
DIP switches setup page 20
Typical Networks page 21
Troubleshooting page 22
Specifications page 24
Warranty Limitation page 26
Thank you for purchasing the FEM or /FEM4
quality local Traffic Aggregator from FibroLAN.
We hope that this guide will help you to obtain
the best results from the device and to
minimize the installation time.
If you still need help installing or troubleshooting the FEM/FEM4 after reading the
detailed information in this guide, please visit our web site, contact your reseller, or call
FibroLAN directly. (Support @fibrolan.com)
Note: unless where indicated otherwise, in this guide FEM applies to FEM/SMR7,
FEM/SMR, FEM/SM, FEM/SM/L, FEM/SM/L2, FEM/SM/L3, FEM/SM/LX, to
FEM/SMRF13 and FEM/SMRF15, and similar FEM4 models
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1 – Overview
The FEM/FEM4 converter from FibroLAN is an ideal solution for extending your
2.045Mbps E1 copper based PBX, switch/router or Multiplexer over a variety of MM or
SM fiber optic interface links
The FEM device includes 4 Fast Ethernet channels and 1 E1 channel across a single
fiber link. The FEM4 models include 4 E1 ports.
Thus the main advantage of this device is the provided additional Fast Ethernet
connectivity, allowing the user to connect its IP traffic with E1 data across the same
F/O link.
The FEM/FEM4 unit has been designed to be deployed in pairs so that at each end of
the fiber link there is an FEM device.
The FEM/FEM4 unit multiplexes Fast Ethernet data and E1 data over the fiber trunk;
however, the active E1 channel reduces the Ethernet data bandwidth by 2Mbps.
AMI or HDB3 bipolar line code can be selected on the E1 copper interface.
The E1 port has a DS1 interface.
The FEM/FEM4 encapsulates E1 data into fast Ethernet frames that are transmitted
over the fiber link. These E1 frames are given the highest priority; they are transmitted
as soon as the transmission of an Ethernet frame is completed. On the receive side,
these frames are extracted from the Ethernet data flow and converted into timed E1
signals.
A built-in buffer stores incoming Ethernet frames when E1 frames are transmitted. Full
100Mbps data bandwidth is restored when no E1 signals are received.
The Ethernet ports can operate in two selectable user modes:
LAN mode: as a local switch with a fiber link interface
Aggregation mode: each Ethernet port forms with the F/O link a separate traffic path
to provide a physical level of security and separation between the users and to allow
traffic only between each user and the F/O link (traffic between users is blocked)
The LAN/Aggregation selection is performed by means of DIP switch S10
The FEM/FEM4 is available with a variety of multi-mode and single mode fiber
interfaces (distances ranging up to 150km) as well as single-fiber-strand (full bi-
directional traffic) models.
The FEM/FEM4 is standard “half-rack” size for economical installation in both rack-
mount and desktop modes. It is equipped with a reliable internal switching power
supply for extended MTBF. The optional DC power supply facilitates deployment in
Telco environments.
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2 – Planning your network with FEM/FEM4
This section will guide you through network planning in order to obtain maximum
benefit - in terms of performance and functionality from the FEM device. Typical
network architectures are shown in the following drawings (which are also applicable to
the FEM4 models)
A. Basic Configurations
1.PBX Configuration
2. Data Network Application
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3. Voice and Data Network Configuration
The basic building blocks of a E1 network are the CSU/DSU, Multiplexer and a
Switch/Router.
The CSU/DSU (channel service unit/data service unit) is the actual connection point
for the E1 wires. It provides line diagnostics and keep-alive functions for the line.
The Multiplexer provides the network to direct multiple channels of voice or data onto a
E1 line. Many Multiplexers have built-in CSU/DSU units for direct connection to the E1
lines
The Switch/Router provides the interface, which permits internal servers and networks
to deploy the E1 line as an interconnection or network extension.
Typically E1 media conversion is deployed in two types of network applications:
1. Private network: where the customer operates all of the E1 equipment (example:
between two buildings interconnected by means of E1 media converters) for
Data Network applications
2. E1 Voice and Data Network Applications
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C. E1, Voice and Data Network Topology
The installation of fiber throughout the network, from the provider to the subscriber
premises, is the only future proof infrastructure design.
The fiber can reach a variety of customer premises, such businesses, schools,
hospitals and other institutions.
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3 – Content of the shipment
The contents of the FEM/FEM4 shipping container are:
• One converter FEM or FEM4 unit. (AC or DC powered unit)
• One AC power cord (excluding shipment to certain countries)
• Power cords for DC (-48V) models are NOT supplied
(FibroLAN DC Power Supply cable, 2m, CBPS-DC48V, part # B151)
• Four plastic “ feet “
• User and Installation Guide manual or Quick Installation Guide
4 – Product General Description
The FEM/FEM4 is offered in the following pre-configured versions as described
below:
FEM Fiber optic E1 modem, 1 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, multi-
mode 1310nm, 2km, not managed
FEM /SMR7 Fiber optic E1 modem, 1 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1310nm, 7km, not managed
FEM /SMR Fiber optic E1 modem, 1 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1310nm, 15km, not managed
FEM /SM Fiber optic E1 modem, 1 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1310nm, 25km, not managed
FEM /SM/L Fiber optic E1 modem, 1 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1310nm, 40km, not managed
FEM /SM/L2 Fiber optic E1 modem, 1 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1310nm, 70km, not managed
FEM /SM/L3 Fiber optic E1 modem, 1 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1550nm, DFB, 100km, not managed
FEM /SM/LX Fiber optic E1 modem, 1 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1550nm, DFB, 150km, not managed
FEM /SMRF13 Fiber optic E1 modem, 1 E1 port 100ohm plus 4 ports 10/100TX, simplex SC, single-
mode single-fiber-strand, 1310nmTx-1550nmRx, 20km, not managed
FEM /SMRF15 Fiber optic E1 modem, 1 E1 port 100ohm plus 4 ports 10/100TX, simplex SC, single-
mode single-fiber-strand, 1550nmTx-1310nmRx, 20km, not managed
FEM4 Fiber optic E1 modem, 4 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, multi-
mode 1310nm, 2km, not managed
FEM4 /SMR7 Fiber optic E1 modem, 4 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1310nm, 7km, not managed
FEM 4/SMR Fiber optic E1 modem, 4 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1310nm, 15km, not managed
FEM4 /SM Fiber optic E1 modem, 4 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1310nm, 25km, not managed
FEM4 /SM/L Fiber optic E1 modem, 4 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1310nm, 40km, not managed
FEM4 /SM/L2 Fiber optic E1 modem, 4 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1310nm, 70km, not managed
FEM4 /SM/L3 Fiber optic E1 modem, 4 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1550nm, DFB, 100km, not managed
FEM4 /SM/LX Fiber optic E1 modem, 4 E1 port 100ohm plus 4 ports 10/100TX, duplex SC, single-
mode 1550nm, DFB, 150km, not managed
FEM 4/SMRF13 Fiber optic E1 modem, 4 E1 port 100ohm plus 4 ports 10/100TX, simplex SC, single-
mode single-fiber-strand, 1310nmTx-1550nmRx, 20km, not managed
FEM 4/SMRF15 Fiber optic E1 modem, 1 E1 port 100ohm plus 4 ports 10/100TX, simplexSC, single-
mode single-fiber-strand, 1550nmTx-1310nmRx, 20km, not managed
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Features Summary
• 10Base-T, 100Base-TX and 100Base-FX modes of operation
•
E1 tunneled over FE – extends life of traditional WANs
• 1 or 4 x RJ45 copper E1 port
• User selectable E1 encoding (HDB3/AMI) via DIP switch S3
• Supports FEF feature (Far-End-Fault) to test F/O Link integrity
• Indicators for Link, Activity (Tx, Rx), FDX, 100M, Power status, LAN or
Aggregator mode of operation,
• E1 port LEDs: Local, Remote and LOS (Loss of signal) FEM models
FEM4 LEDs: LOS and Signal
• Hardware based 10/100, Full/Half, Auto-Negotiation and MDI/MDI-X Auto-
Cross feature.
• Wire speed reception and transmission
• Supports 1K Mac addresses
• Automatic address learning and address aging (aging period is 300s)
• Frame length range: 64 ÷ 1916 bytes max.
• FDX Flow Control (IEEE 802.3x) and HDX back pressure Flow Control
• Optional DC Power Supply for Telco environments
• Desktop, shelf or wall mount installation
• ETR: Extended Temperature Range (-10°÷ +70°C) for indoors-industrial
environment installation: optional for all FEM models.
• Local Loop-back on E1 port to test the TX and RX logic (DIP Switch#1)
• Remote Loop-back on E1 link to test the E1 line (DIP Switch#2)
• AIS (Alarm Indication Signal) on LOS (Loss of Signal)
• Various FEM/FEM4 models to cover distances up to 150Km
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General Description
All FEM/FEM4 models have identical functionality and performance. Therefore, any
description and features of one model refers to all other types.
The FEM/FEM4 is available with a variety of multi-mode and single-mode interfaces
with distance ranging from 2km to 150km.
It converts 100Base-FX signals received on its F/O interface in 10/100Base-TX signals
and distributes them to 4 copper (shielded RJ-45) ports. Each of these ports is
buffered; furthermore, in Aggregation mode (DIP switch S10 in down position) 4
separate groups are formed each including one Ethernet copper port and the common
F/O port, providing the users with basic security (no connection between the users).
AMI or HDB3 bipolar line code support on the E1 copper interface. (via DIP switch S3)
The Ethernet copper ports are auto-negotiating and will automatically adapt
themselves to the capacity of the users for highest performance (will negotiate 10/100
and FDX/HDX). Nevertheless, in some cases it may be necessary to force certain
operating mode
For this purpose, copper port 1 may be (individually) forced to the following
combinations: 10/FDX, 10/HDX, 100FDX or 100/HDX. While the TP ports 2, 3,and 4
operate in auto-negotiation, this port might be set via the front panel DIP switches S7
S8 and S9 to one of the above operation modes (refer to section 11)
The F/O port supports 100Base-FX transmission, set to FDX (Full Duplex) mode.
The F/O port will always operate in FDX even when the TP port operates at HDX.
Front panel diagnostic LEDs provide information on the operation mode of every port.
The device is housed in a compact and rugged metal case, providing strong free –air-
cooling for extended stable operation and reliability.
The FEM/FEM4 is packaged in a rugged “half rack” enclosure allowing elegant and
safe deployment in a variety of environments: desktop, 2 units on a 19” rack-shelf or
within a standard “half 19” rack (optional brackets required).
The FEM/FEM4 is equipped with a single internal power supply (100 - 240V universal
input), or an optional -48 VDC power supply (PS48) highly overrated to increase the
system’s MTBF. A front panel LED indicates the power status.
The FEM/FEM4 supports the Far End Fault (FEF) feature.
Far End Fault occurs when the signal detection is logically false from the receive
(Incoming path) fiber port. When the FEM/FEM4 detects a F/O Link Loss condition, the
unit will automatically send a Far End Fault signal to the remote device (on it outgoing
path). The remote device should support the same FEF feature and it will
Indicate a Link Loss as well. (Refer to section 6 for more details).
The Alarm Indication Signal (AIS) consists of an unframed all-ones signal
transmitted to maintain transmission continuity in case of LOS (loss of data)
occurrence.
The FEM/FEM4 device features user-selectable E1 port Local and Remote Loop-Back
monitoring for diagnostics purposes (enabled/disabled by DIP switches S1 and S2).
Diagnostic LEDs ease installation and troubleshooting (see “Front Panel” section)
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5 – Front Panel (Parts Identification)
1.Power ON LED: (Power On/Off green LED indicator)
2.LAN LED: lit (amber) implies (DIP Switch#10 UP): LAN (switch) mode of operation
of the TP ports. LED OFF (DIP Switch#10 Down): Aggregator mode:
each Ethernet port forms a separate traffic path with the F/O port
Note: this LED is not present in the FEM4 models
3.Duplex SC fiber optic connector: (left /Tx & right / Rx)
The port is configured by default to operate at 100Mb Full Duplex.
4. Link Partner LED: (green) lit implies that a link has been established with the
remote attached device
5. F/O Link/Activity LED (green): constant lit: F/O Link present. Blinking implies
Activity (transmits or receives data).
6. Mode Setup: Array of 10 DIP switches (see DIP switches setting – section 11)
7. RJ45 – Ethernet ports 1 to 4 connectors
8. Link / Activity: LED (green, for each TP port) constant lit implies TP link present:
When blinking implies data activity (transmits or receives mode).
9. FDX LED (green): Full Duplex indicator for ports 1-4: lit when FDX detected
10.100M LED (amber): TP ports 100M: lit when 100Mbps detected or forced (TP port
1 via DIP switch S9)
11. E1 port: RJ-45, 120ohm, up to ~ 2Km
12. LED LOS (Loss of signal): lit red when a signal is not present at the local E1
port
13. LED REMOTE: lit green when a signal is present at the E1 port of the remote
FEM attached device (not present in FEM4 models)
14. LED LOCAL: lit green when a signal is present at the local E1 port
(not present in FEM4 models)
Each E1 port in FEM4 devices includes two LEDs:
LOS (red) = Loss of signal
Signal (green) = a signal is present at the local related E1 port
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6 – 100Base-FX Far End Fault (FEF feature)
Usually a “LINK” indication is related to the incoming fiber only: F/O Link ON shows
that the path created by the remote transmitter, local receiver and the fiber connecting
them is operational. However if there is a fault in the other – outgoing - path (created
by the local transmitter, remote receiver and the fiber connecting them) – the indication
for such fault can be seen on the remote device only.
The FEF implemented in the FEM/FEM4 devices close this gap: if there is a fault in the
incoming receive path of the lower FEM/FEM4 (see drawing below), then the F/O
Link/Act LED will go OFF on both FEM/FEM4 devices. In this way we avoid the
possibility of having a FX Link ON indication at one end, while, in reality one of the F/O
data path is disrupted. The following drawing depicts the FEF functionality.
The FEF Feature is always enabled and functional in FEM/FEM4 devices
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7 – Link Loss indications on E1 ports
1. Link loss at the copper input E1 port at the remote FEM device causes the
following events:
a. the Local green LED goes off (2)
b. the LOS LED (red) lit (3)
c. a failure indication signal is sent to the local FEM unit
2. The failure signal causes the Remote LED at the local FEM unit to be off (4)
AI (Alarm Indication Signal) is transmitted (5) to the Local Device which is
notified and alerted that the E1 path is malfunctioning.
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8 – Installation
The device is intended for use with indoors power lines only
The installation procedures are applicable to all FEM/FEM4 models including the
DC powered versions.
For wall mount installation
Two suitable holes on the back of the FEM/FEM4 permit wall mount Installation.
The two holes are 188mm apart
Use two suitable screws having heads diameter less than 8mm.
For Desktop use: Affix the supplied plastic “feet” (after peeling off the adhesive
protecting sheet) to the bottom of the devices, with each “foot” approximately 1 cm
from each edge.
Place the device horizontally on a hard, clean surface (desk, shelf, etc.), leaving free
space around it for natural ventilation. Avoid putting the device on other active, heat
generating equipment and avoid putting such devices on the FEM/FEM4.
19” Rack installation
You may deploy the optional FibroLAN RM2 (# B160) 19” rack shelf for installation of
up to two FEM devices.
Use the RM2, install it in the rack and place one or two FEM side by side on the shelf.
Make sure to leave a gap of at least 2-3cm above the unit.
9 – Power Connection
CAUTION: When connecting a device to an AC (DC) power
outlet, always first connect the cord to the device, and ensure
that it is securely fastened. Only afterward connect the cord to
the wall outlet. Make sure to use grounded (3 way) outlets (in
case of AC models).
For each country FibroLAN (or FibroLAN’s distributor) provide with the
product an appropriate power supply cord which is safety approved in
accordance with related country’s National Electric Code
FEM/FEM4 AC connection
Connect to AC line socket at the rear of the FEM/FEM4, using the included power cord.
The device will accept and automatically switch between any line voltage from 100 to
240 VAC, 50-60 Hz.
There is no ON/OFF switch on the device. When the power is connected to the device,
the device is ON. The POWER LED on the front panel being illuminated will indicate
this state
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FEM/FEM4 Rear panel- AC Inlet
FEM/FEM4 with 48 VDC Power Supply ( PS48 )
FEM/FEM4 Rear panel- DC Inlet
Proceed as above using a suitable DC supply cable. Verify that the DC-Mains
provide a 10Amp DC circuit breaker. Ensure that the polarity of the cable complies
with the polarity of the DC receptacle on the device as depicted above. If you use the
FibroLAN CBPS-48V cable (B151), insert all-way-in the D-type DC connector and
secure the D-Shell to the DC Inlet of the FEM/FEM4 device using the two captive
screws. Connect the cable 3 leads to the DC Power Outlet, ensuring that the -48V
blue lead is connected to the -48V of the DC Power Outlet, the red/brown OV lead to
the OV of the DC Power Outlet, and the ground lead (yellow/green) to the ground of
the DC Power Outlet. There is no ON/OFF switch on the device. When the power is
connected to the device, the device is ON. The POWER LED being illuminated will
indicate this.
NEVER OPEN THE DEVICE WHEN IT IS CONNECTED TO POWER LINES!
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10 – Fiber Optic Connection
The FEM is equipped with 1 pair of SC-type connector or single SC connector for SFS
(Single –Fiber – Strand) model.
Do not remove the protective covers on the fiber connectors until you are ready to
connect the fiber optic cables. Power should be connected before attaching the fiber
optic cables. When dealing with fiber optic cables, it is essential to ensure that the TX
at one end of the link is connected to the RX at the other end of the link.
Some duplex fiber optic cables are color coded to help monitor the direction of data
transmission. If the fibers are not coded, special attention must be paid to ensure a
proper connection.
Laser Warning
CAUTION
Radiation emitted from a fiber optic connector may be hazardous
to human vision. Therefore, the following rules must be strictly
observed
All Single-mode (SM) models are CLASS I LASER PRODUCT that
may endanger your eyes and must be handled with special care
When not in use, keep the fiber optic connector closed using its
protective cover
Never stare directly into the fiber optic connector of a powered
device or into the end of a fiber connected to it.
Do not look directly into the fiber optic cables or transmitter
Laser Safety
The emissions produced by the end products described in this guide are under Class 1
emission level according to IEC 60825-1 and the FDA 21 CFR 1040.10 and 1040.1. These
products shall not be installed in an optical network handling above Class 1 level.
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F/O port specifications
Option F/O
Port
Transmit
WL
nm
Minimal
Output
Power
dBm
Maximal
Output
Power
dBm
Receive
WL
nm
Min
Receive
Sensitivity
dBm
Maximal
Input
Power
dBm
Suggested
Distance
Km
MM Duplex
SC,MM 1310 - 20 - 14 1310 -30 -14 0-2
SMR7 Duplex
SC, SM 1310 -20 -8 1310 -30 -3 0-7
SMR Duplex
SC, SM 1310 -16 -8 1310 -30 -3 0-15
SM Duplex
SC, SM 1310 -15 -8 1310 -33 -3 0-25
SM/L Duplex
SC, SM 1310 -11 0 1310 -33 -3 15-40
SM/L2 Duplex
SC, SM 1310 -3 2 1310 -35 -3 25-70
SML3 Duplex
SC, SM 1550DFB -4 0 1550 -36 -3 40-100
SM/LX Duplex
SC, SM 1550DFB 0 5 1550 -38 -3 70-150
SMRF13
Simplex
SC, SM
SFS
1310 -15 -7 1550 -32 -3 0-20
SMRF15
Simplex
SC, SM
SFS
1550 -15 -7 1310 -32 -3 0-20
11 – Twisted Pair Cabling connection
The FEM provides 4-shielded RJ-45 connectors to interface to the twisted pair links.
As each of the FEM RJ-45 4 ports supports: full Auto-negotiation, auto-polarity and
Auto-cross, you can simply connect any device to any port by using a standard
straight or crossed cable. If you may need to force an operation mode other than auto-
negotiation on TP port 1, this can be implemented through the front panel S9 and S10
DIP switches. Use a shielded Cable Type 5 or higher grade, up to 100m (330ft) long to
ensure proper operation at 100Mbps.
On FEM with the Auto-cross feature, each RJ45 port has the intelligence to sense the
type of cable, which has been connected to it and will automatically configure itself to
either MDI or MDI-X mode of operation.
E1 Port: RJ45, 120ohm, up to ~ 2Km (Pin Layout: 5=+TX, 4= -TX, 2=+RX, 1=-RX).
Advanced FE/E1 Fiber Converters
20
12 – DIP switches setup
The FEM/FEM4 is equipped with an array of 10 DIP switches marked “MODE SETUP”
that facilitate the proper setting of the device and individual ports.
Shaded areas indicate factory default setting.
Use a small tool (pen tip or a tiny flat-head screwdriver) to set the switches.
Switch
No. Function Up Position Down
Position
Comments
1 E1 port
Local Loop-Back
Enable Disable Applicable to all 4 E1 ports
in FEM4 models
2 E1 port
Remote Loop-
Back
Enable Disable Applicable to all 4 E1 ports
in FEM4 models
3 Encode
HDB3AMI
AMI B8ZS Applicable to all 4 E1 ports
in FEM4 models
4 Not in Use
5 Not in Use
6 Not in Use
7 Channel 1 port
Auto-
Negotiation
Enable Disable
8 Channel 1 port
10/100
100 10
9 Channel 1 port
FDX/HDX
FDX HDX
10 LAN/Aggregator
Selector
LAN mode Aggregator
mode
LAN mode operation;
Ethernet TP ports can talk
each other and with the F/O
port
Aggregator mode: each TP
port with the F/O port forms
a separate traffic path
DIP switch # 7 (Up position = Auto-Negotiation) override S8 and S9
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