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モデム 3onedata MODEL7302のPDF ユーザーマニュアルをオンラインで閲覧またはダウンロードできます。3onedata MODEL7302 10 ページ。 Fe1 optic fiber modem

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1. Introduction

MODEL7302 FE1 Fiber Modem is a high-performance E1 fiber optic modem developed by

using a dedicated integrated circuit. It is to modulate a framing or non-framing E1 data signal

directly into single- or multi-mode optic fiber for a transmission via optic cable line. At

another end of the optic cable, optical signal is demodulated into a framing or non-framing E1

data signal. E1 interface may be directly connected with the E1 interfaces of image and data

terminals or the WAN ports of MUX, exchanger and router for a dedicated network setup or a

LAN connection.

2. Product Features



Conforms to all relevant ITU series standards( ITU-T G.703 G.704 G.823)



Transmit one E1 channel



Framing or non-framing mode in option



E1 time slot in arbitrary option

Balanced 120Ω/non-balanced 75Ω interfaces automatic



Support the loop back of local analog/digital interface



Support remote loop back function (valid on under framing mode)

Support pseudo-random code test function, providing convenience for the test of optic



fiber line status



120km trunking -free transmission distance for single-mode optic fiber

Capable to be communicated with V.35 fiber modem



Available with complete line detection and alarm indications



Available

with

(frame-mounted structure can be inserted with 16 modules);

AC 220V and DC –48V inputs may be selected for fiber optic modems of both structures;



For frame-mounted fiber optic modems, dual power supply heat backup is provided to

ensure a Receiving level：0~-43db

3. Specifications

Optic interface:

Line mode type: CMI



Line mode rate: 2.048Mbps



Operating wavelength:850nm,1310nm or 1550nm



Optic fiber connector: SC/PC



Applicable optic fiber: multi-mode, single-mode



Transmission distance:

Single-mode: up to 120km Multi-mode: up to 2km

E1 interface:

Standard: ITU-T G.703 G.704



Frame structure: framing CCS(PCM31)/ CAS(PCM30)



Rate:N× 64Kbps (N=1~31)or 2.048Mbps

independent

structure

and

19-inch

Page 3 of 10

MODEL7302 User Manual

frame-mounted

structure