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XL-FMUX4E1T
4-E1 and Fast Ethernet
over fiber cable
PDH Fiber Optic Multiplexer
User’s Manual
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XL-FMUX4E1T Fiber Optic Multiplexers User’s Manual www.xtendlan.com
Contents
1 FOREWORD............................................................................................................................................................2
2 DESCRIPTION.........................................................................................................................................................2
3 FEATURES & HIGHLIGHTS.................................................................................................................................3
4 SPECIFICATION .....................................................................................................................................................3
5 FORM OF THE EQUIPMENT................................................................................................................................4
5.1 FRONT PANEL ..................................................................................................................................................... 4
5.2 REAR PANEL........................................................................................................................................................ 5
6 INST ALLA TI ON AND MAINTENANCE...............................................................................................................6
6.1 UNPACKING ........................................................................................................................................................6
6.2 INSTALLATION.....................................................................................................................................................6
6.3 NOTICES FOR INSTALLATION...............................................................................................................................7
7 START EQUIPMENT..............................................................................................................................................7
8 FAULT TREATMENT..............................................................................................................................................8
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1 Foreword
XL-FMUX optic multiplexers are the medium and low-capacity PDH optic transferring and access
equipments developed and manufactured independently by XtendLan, which apply the latest
technology and professional super-sized programmable integrate circuit, and provide multiplexing and
de-multiplexing and optic-electric transferring of E1/4E1/8E1/16E1 digital signals. The rich bit
overhead provides not only various capacities of main channel business transferring, such as
E1/G.703 interface, V.35 based on 2048kbit/s and 10/100Base-T interface, but also RS232 low rate
data channel, office communication channel and network administrative channel.
XL-FMUX optic multiplexers have the remote looping function of 2M tributary, facilitating the test
and fault positioning. They have perfect fault self-diagnosing function, provide optic transferring link
alarm, 2Mbit/s tributary alarm and sound alarm.
The equipment uses 1B1H line coding, and supports dual-fiber bi-directional mode and
signal-fiber bi-directional mode. Several types are available to meet different requirements. The
equipment is suitable for point to point optic transferring line, able to provide public and special
networks with high-quality, flexible and reliable optic transferring digital line.
The multiplexer is high in integration, strong in reliability, low in power consumption, small in size
and overall in function. Even in severe environment, the equipment is still stable. The whole equipment
requires no adjustment during installation. It is convenient in use and simple in maintenance.
2 Description
XL-FMUX4E1T is a high-performance optic transferring equipment with special chip, providing the
multiplexing and de-multiplexing of 4E1 data signals and conversion of optic and electric, and realizing
long distance data transferring. The main channel has 4 E1/G.703 interfaces. Meanwhile, it also
provides one two channels of 10/100Base-Tx. One channel of office communication uses the two
ordinary phone lines to communicate the office business between stations.
The equipment uses special line code with a transferring speed of 125Mbit/s, and supports
dual-fiber and single-fiber, meeting different requirements and increasing the utilization of optic fiber.
XL-FMUX4E1T optic multiplexers are high in integration, strong in reliability, low in power
consumption, small in size and overall in function, suitable for point to point optic transferring line, and
able to provide public and special networks with high-quality, flexible and reliable optic transferring
digital line. They are the optimal choice for such network operators as China Telecom and China
Mobile, and the special networks for electric power, public security, oil and other industries.
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3 Features & Highlights
• According with ITU-T G.703, G.704, G.823 recommendations, could be connected to
various digital transition equipments.
• Simple in installation and high in reliability
• Full speed Ethernet 100Mbps supported. 2 RJ-45 ports share the 100Mbps bandwidth.
• Complete device bandwidth is 108Mbps (4x 2Mbps + 1x 100Mbps)
• The standard transmission distance is 50Km, the maximum can up to 120Km.
• Provides audible and visual alarm, all the operations can be completed by DIP switch on
the front panel.
• Supports 2M tributaries loop back of the local equipment and remote.
• E1 interfaces adopts digital timing recovery circuit and digital flat phase-lock circuit
• Supports single-fiber bi-directional transmission.
• Two power supply modes: -48VDC and 220VAC. (Optional)
• Size: 440 (width) × 220 (depth) × 44.5 mm (height)
4 Specification
Model: XL-FMUX4E1T
E1 interface specifications
• Date Rate: 2.048Mbps
• Line Coding: HDB3
• Physical Connector: Balanced: RJ-45; Unbalanced: BNC
• Impedance: 75Ω unbalanced or 120Ω balanced
• Electrical interface: compliant with ITU-T G.703
• Jitter transfer: compliant with ITU-T G.742
• Jitter tolerance: compliant with ITU-T G. 823
Fiber Optic Interface specifications
• Fiber connector: SC (SC/PC)
• Fiber type: WDM, 1310nm/1550nm, single fiber core
• Interface Rate: 155Mbps
• Transmitter type: LED or Laser (long haul)
• Transmission range: 26dB optical margin, recommended for 50km application on single
mode fiber. (RX sensitivity -36dBm, TX power output -10dBm @ fiber 9/125mm)
Other specifications
• Hot-line connector: RJ-11
• Indicators: PWR, RMA, RNL, LFA, BER, CH1-CH4, LINK, FDX, BT
• Button: CALL
• Configuration: One 10-position DIP switches for setting local or remote loop back
• Power: 110~220VAC
• Power Consumption: ＜15W
• Temperature: 0-50/32-122oF
• Humidity: UP to 90%, non-condensing
• Dimension: 9.6”Lx 7.8’’W x 1.8’’H
• Net Weight: 2kg
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XL-FMUX4E1T Fiber Optic Multiplexers User’s Manual www.xtendlan.com
5 Form of the equipment
5.1 Front Panel
¾ LEDs:
LED Indicators Color Status Description
PWR Green ON Indicator for power supply.
RAD
LOS Red ON Loss of optical signal.
LOF Red ON Loss of frame
BER Red ON Bit error in 2M lines
CH1-CH4 Green ON
LINK1 Green ON/OFF
LINK2 Green ON
FDX1 Green ON/OFF
FDX2 Green ON/OFF
Red
ON
Remote alarm indicator
E1 channels indicator. Green means All the
2M tributaries are working normally
Ethernet rate indicator. ON means 100M on
the TP1. OFF means 10M
Ethernet rate indicator. ON means 100M on
the TP2. OFF means 10M
ON means TP1 under Full Duplex Mode,
OFF means Half Duplex mode
ON means TP2 under Full Duplex Mode,
OFF means Half Duplex mode
BT1 Green ON/FLASH
BT2 Green ON/FLASH
¾ DIP Switches and Buttons
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ON means no data on the TP1, Flash means
transmit or receive data.
ON means no data on the TP2, Flash means
transmit or receive data.
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Item Description
CALL Push down to make a call with remote side
PWR
DIP switches Description
SW1
SW1
PHONE RJ-11, engineer order wire
¾ Loop back status
ON means power on，OFF means power off
1 ON means to loop back from remote 1st E1 tributary
2 ON means to loop back from remote 2nd E1 tributary
3 ON means to loop back from remote 3rd E1 tributary
4 ON means to loop back from remote 4th E1 tributary
5 NA
6 NA
7 NA
8 NA
OFF means loop back from remote side, ON means loop back from
9
local side
10 ON means bell cut
Lo c a l loop b a c k Re m ote loo p b a c k
E1 s
E1 s
E1 s
Fiber cable
E1 s
5.2 Rear panel
¾ Interface Description
Interface Type Description
TP1，TP2
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Supports 10/100M, full duplex, half duplex, auto negotiation, RJ-45
interface, Bandwidth:100M
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Console
E1 75Ω
E1 120Ω
It is available for manufacturer only
Unbalanced E1 tributaries
Balanced E1 tributaries
¾ Balance E1 interface definition:
RJ-45 Pinout Signal Description
1 TX- Transmit output, Negative
2 TX+ Transmit output, Positive
3 S1 Transmit Ground
4 RX- Receive input, Negative
5 RX+ Receive input, Positive
6 S2 Receive Ground
¾ TP1, TP2 interface definition:
RJ-45 1 2 3 4 5 6 7 8
Function TX+ TX- RX+ NC NC RX- NC NC
6 Installation and maintenance
6.1 Unpacking
After the equipment arrives, unpack and check it before installation. Items to be checked are as
follows:
● The external package is in good condition or not. If it is damaged seriously, please contact our
after-sale service department immediately for solving.
● Based on the package list, verify the items one by one. If there is any serious damage on the
surface or any accessories missed, please contact the installation person or directly contact our
after-sale service department.
● Please check carefully whether the equipment type and quantity are in conformity with what you
ordered.
● Check the power supply mode.
6.2 Installation
● Fix the equipment on the 19” rack-mount.
● According to the manual, connect power supply with the power cable. Pay attention to the
power polarity.
● According to actual situation, make and connect relevant cable (2M, RS-232). Do not connect
the TX and RX optic cables wrongly.
● Connect the TX and RX optical fibers (or patch cords) to the optical RX and TX connectors in
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the equipment. Do not connect the TX and RX fibers wrongly. Check whether the fiber head is
clean or not. Insert the optical fiber (or patch cords) and make sure the connection is good. (The
bending radius of optical fiber must ≥50mm.)
● Use a multimeter to check the power polarity and voltage is in conformity with equipment
requirements or not. This is especially recommended for 48V power supply version.
● After all installation and check, turn on the power supply switch.
● Check whether the equipment indicator light is the same as the actual situation (Refer to
relevant chapters in the manual.).
Note: When install single fiber Optic Multiplexers, you must ensure they are same TX and
RX wavelength, for example: TX:1550nm, RX:1310nm must match with TX:1310nm,
RX:1550nm
6.3 Notices for Installation
1) Avoid strong vibration and mechanical damage during transportation and installation.
2) Place the optical fibers reasonable. The bending radius of optical fiber must ≥50mm.
3) Check whether the voltage and polarity is in conformity with the marks on the rear panel before
supplying power. Otherwise, it may cause permanent damage to the equipment.
4) The optical fiber connector cannot be contaminated. Clean the fiber head with alcohol before use.
Otherwise, it may affect the transmission distance. If the optical fiber connector is connected
wrongly, it may cause more power consumption. Adjust the connector according to the actual
situation.
5) The installation position shall be easy for persons to access and transport equipment.
6) The ambient environment shall be dry, clean and good in ventilation.
7 Start Equipment
Turn the power supply switch to ON.
After supplying power, check and verify relevant indicators and alarms according to the manual.
Caution：Please turn power supply off and contact with our after-service engineer once you find
any error。
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XL-FMUX4E1T Fiber Optic Multiplexers User’s Manual www.xtendlan.com
8 Fault Treatment
Before leaving factory, the equipment has been adjusted to optimal status, and all the functional
interfaces are all in the front and rear panel. Except our technicians, no one shall open the unit shell
freely. When the equipment has fault, use the stand-alone self-loop-back function to decide the fault
scope and contact us immediately.
The table below lists the common faults and alarms, the possible causes for alarms and solution, only
for reference.
Equipment Alarms and Corresponding Treatment
No Alarm
1
2
3
5
6 CH# alarm
7
Primary
Alarm
Secondary
Alarm
POWER is
on.
Red LOS
light is on.
Red LOF
light is on.
Red RAD
light is on.
Sound
alarm
Possible
Causes
Cannot supply
power.
Cannot
receive optical
signal.
Cannot
receive
normal frame
signal.
The opposite
end alarms.
Cannot
receive 2M
signals.
The local end
alarms.
The power supply is not connected well. The
polarities are reversed.
The optical fiber link is not through. There is on
optical light from the opposite end.
The receiving is not stable. Check the optical link
and equipment.
Check the opposite end.
Check the quality of fiber cable. The TX and RX
You may screen the equipment when handling
fault.
Treatment
fibers are connected in reverse or not.
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