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FOM480 is a 155Mbit/s transfer rate optical-electric transfer device. It has 16 standard E1 ports, 1×100Mbit/s 10/100M BAS_T self-adaptable Ethernet interface to convert electrical signals to 1 port optical signal. FOM480 is a multi-task platform PDH device with extendable board and sockets. It contains LED and control panel on front panel. Users can set its work modes and monitor current status.

FOM480 has single-optical-port, which can be extended to double-optical-port, 1+1 protection. The lacer has auto-shutdown at non-working status function.


FOM480 has 7 card slots. From the left, the first slot is power supply slot and another 4 slots are extension card slots, and 100M Ethernet card, and Optical interface card

FOM480 Signal Processing Slot List
Module Introduction
4×E1 4 channels of E1 port (ballanced/unballanced)
4×V.35 4 channels of V.35 port
4E1-LAN port 4E1-LAN converter card, 8Mbit/s bandwidth
100M LAN Pure 100Mbit/s Bas-T card
Optical interface Optical interface card


Frame Parameter

The framework of FOM480 is compound metal, 19 inch external width; 1U height; 30cm length.

This equipment can be located on any stable base, and can be also screwed through mounting hole to 19 inch cabinet.


Port Physical Parameter

Name Description
E1 port BNC(75Ω)/RJ45(120Ω) 16E1 ports totally
Optical Interface FC/SC
LAN Interface RJ45
V.35 port DB25/F-connector
NM port DB9(socket)
SNMP-LAN port RJ45

Port Electrical Parameter

Optical Interface

Code rate: 150Mbit/s
Fiber mode: Single mode 9/125μm
Wavelength: 1310nm/1550nm
Transmit power: -15dBm∼-3dBm
Receive sensitivity: -44dBm∼-38dBm
Port amount: 1∼2

2Mbit/s Interface(E1)

Transmission Type: HDB3
Transmission Rate: 2048Kbit/s
Permissible Deviation: ±5×10E-5
Impedance at E1 Interface: 75Ω/120Ω
E1 Signal Amplitude: 2.37V/3V

LAN Interface

Specification: IEEE802.3
Bandwidth: 100Mbit/s
Applicable Ethernet rate:
      10M/100M auto adaptation
Work mode: Half-duplex/full duplex

V.35 port

Clock Type: DCE/DTE optional
Data rate: N×64Kbit/s, N=1∼32
Frame: frame/unframe optional
PCM30/31: Optional
TS occupancy: discretionary
Data mode: differentiate
Signal output level: 2.5V∼5V
Minimum input level: 0.2V

NM port

Interface type: RS232
Code rate: 9.6Kbit/s
IP address capacity: 255
Communicaition protocol: Internal
Call origination: Address enquiry
working platform: WINDOWS X

Power Supply

Feeding type: 220V/AC\-48V/DC
Feeding mode:AC/DC single/both
Power consumption: < 15W
Feeding current: < 0.1A
DC feeding range: -36V∼-72V
AC feeding range: 65V∼260V


ip address: selectable
Capacity: 10000 units
Protocol: SNMP

Working Environment

Operation temperature: 0℃∼+55℃
Relative humidity: 0%∼90%(30℃)



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