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Fiber Optic Multiplexor FMUX-4-ETV8

Discontinued, recommended replacement is: FMUX/M, FMUX/S

Optical Transceiver Parameters

Fiber Optic Multiplexor FMUX-4-ETV8 Features:
  • Transmittion of four E1 channels via fiber optic link
  • Independent port Ethernet 10/100Base-T,
    large frames are supported (VLAN compatible)
  • Single mode or multimode fiber
  • Distance up to 170 km
  • Compliance with ITU-T G.703, G.742, G.823, G.955 standards
  • Local and remote loopbacks
  • Integrated BER tester
  • Console RS-232 port
  • Optional SNMP Ethernet control port
  • Remote management
  • Dry contacts alarm interface
  • Rack-mount 1U
  • AC or DC power
  • Certificate N ОС-6-СП-1998

FMUX-4-ETV8 is a 5 channel multiplexor for transmitting 4 E1 channels and one Ethernet 10/100Base-T channel over the fiber optic link. All channels have independent sync signals with their own frequencies.

The Ethernet 10/100Base-T channel transmits independently of E1 channels and has a bandwidth of 8192 kbps. VLAN protocol supported.

FMUX has LEDs for channels ready state, optic transceiver operability, loopbacks enable state and test mode indication. The control of loopbacks states and of the integral BER tester is available by the console port located on front panel. BER tester meters bit error rate in optic link using permanent or pseudo random code in compliance with the ITU-T O.151 Recommendation (test sequence length equals to 215-1=32767 bits).

Device state can be monitored by SNMP using separate Ethernet 10Base-T port.

Remote device management is available by remote login feature. Service data exchange is supported by additional service channel using same optic link.

Alarm indication relay with "dry contacts" interface in compliance with the ITU-T G.742 Recommendation, paragraph 10, is supplied.

The firmware of the device can be updated by user.


Interface E1 (2048 kbit/sec)
Connector Type RJ-48 (female 8 pins)
Line Code HDB3
Framing Transparent; both framed and unframed modes supported
Error Detection Bipolar Violation
Line Impedance 120 Ohm (Twisted Pair)
Receive Signal Attenuation Range From 0 to -36 dB
Input Signal Measurement Precision 2 dB
Jitter Attenuator In transmit path
Overvoltage Protection TVS
Overcurrent Protection Fuse
Interface Ethernet
Interface 10/100Base-T
Connector Type RJ-45 (female)
Data rate 8192, 4096, 2048, 1024, 512, 256, 128 or 64 kbit/sec
Mode 100 Mbps Full-duplex,
100 Mbps Half-duplex,
10 Mbps Full-duplex,
10 Mbps Half-duplex,
or Autonegotiation
Address table size 15000 MAC addresses
Maximum packet size 4224 bytes, including MAC header
Protocols Transparent or Cisco-HDLC bridging IEEE protocol, automatically selected
Quality of Service 8 priority levels
Alarm Interface
Connector Type 9 pin DB9 female
Relay Contact Current Up to 600 mA
Relay Contact Voltage Up to 110 VDC / 125 VAC
Control interface
Connector Type RS-232 DCE, DB-9 (female)
Protocol Asynchronous, 9600 bit/sec, 8 bit/symbol, 1 stop bit, no parity
Modem Control Signals DTR, DSR, CTS, RTS, CD
Diagnoctic modes
Loopbacks Local, Remote
BER Tester Built-in
Control Via control port RS-232 or from remote unit
Box Rack mount 19" 1U
Dimensions 444 mm x 262 mm x 44 mm
Weight 3400 g
Power source
AC power source 176-264 V, 50 Hz
DC power source 36-72 V
Power 12.5 VA Max
Temperature 0° - 50°С
Humidity 0 to 80 %, non-condensing

Optical transceiver parameters

Specification L15 L13X D13 D13S D85
Wavelength 1550 nm 1300 nm 1300 nm 1300 nm 850 nm
Fiber Type Single-mode Single-mode Single-mode Single-fiber, Single-mode Multimode
Light Source Laser Diode Laser Diode LED LED LED
Optical Output Power (avg) -3 dBm -3 dBm -19 dBm -17 dBm -20 dBm
Optical Power Monitoring (per G.956) Yes Yes No No No
Min. Receiver Input Power (10-10 BER) -39 dBm -39 dBm -38 dBm -36 dBm -39 dBm
Min. Cable Length Limitation No No No No No
Optic Cable Power Budget 34 dB 34 dB 17 dB 17 dB 18 dB
Max. Optic Cable Length (depends on optic cable) 85 - 170 km 56 - 85 km 28 - 42 km 28 - 42 km 3.5 - 5 km


Some of the documents are in Adobe® Acrobat® Reader® format

PDF  FMUX-4-ETV8 - User's Manual in Russian
MIB  MIB-files for SNMP-management

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