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FOM8E1 is one kind of PDH with 150Mbit/s transferring bandwidth. It contains 8 E1 ports, 1 100Mbit/s 10M/100M Bas_T auto adapted Ethernet, 1 N×64K V.35, 2 RS232. FOM8E1 multiplexes these signals into one piece of optical signal and it is one with small volume. With LED alarm and control unit on the front pannel, we can set up working mode, and supervise the status conviniently.

FOM8E1 has one optical interface, also can be extended to dual to be 1+1 protection. The laser shuts down automatically when it is not working.

OMT240S, as a branch of FOM8E1, has all the functions of FOM8E1. Additionally the eighth E1 works as a V.35-E1 converter. One terminal is E1 port, the other one is V.35 optional. This special function is designed for convenient use for customers.


Frame Parameter

FOM8E1's framework is made of compount metal. 19 inch external width, 1U height, 25cm 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)8 ports totally
Optical Interface FC/SC
LAN Interface RJ45
V.24 port RJ45
NM port RJ45
Alarm Export RJ45
V.35 port F-connector(34 pins)


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

Engineering orderwire

Analog bandwidth: 300∼3.4KHz
Code rate: 64Kbit/s
Interface mode: 4-wire
Calling mode: button,general call
Ring down: buzzer
Audio frequency level: -10dBm∼20dBm

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

V.24 port

Interface type: RS232
Logic level: 0=+10V, 1=-10V
Trans-rate: 0∼128Kbit/s
Sampling rate: 1024KHz
Interface static protection: supported
Interface protective voltage: ±10V

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

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

Alarm Interface

Interface form: Relay contact
Alarm amount:
      2, urgent/non-urgent alarm
Alarm mode: buzzer
Clearance mode: panel control

Working Environment

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



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