Chapter 1 - Overview; Features; Description - TC Communications TC8000 User Manual

4 to 28 channel audio/intercom and data fiber optic multiplexer

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Table Of Contents

Table of Contents

Features

Muxes

to 28 Channels of Analog or Intercom Signals

Covers Voice Band Width from 300Hz to 3. Khz

 PCM Digitized Voice Technology-Extremely Low Noise

Data Card can support 8 or 16 Channels of Data such as RS-232, RS- 22, RS- 85,

TTL or Dry Contact Closure Detector

Single Mode or Multimode

 Built-In Power Redundancy

Optional Optical Redundancy

 Field Interchangeable Interface Modules

LEDs for "Alarm", "Power A", "Power B", "Vcc", Channel Indicators

Rack Mount or Standalone

Description

The TC8000 onsists of AUDIO INTERFACE MODULES, a DIGITAL PROCESSING UNIT

and OPTICAL Tx & Rx. Utilizing the latest te hnology and omponents available on the market,

the audio interfa e modules ontain CODEC hips to digitize analog audio signals and onverts to

PCM (pulse ode modulation). The PCM signals are digital odes sampled by DIGITAL PRO-

CESS UNIT and onverted to series of logi al "0" and "1". Then the series of ode is transmitted

through the opti transmitter. The re eiving pro ess is the same but reversed.

Three kinds of interfa es an be spe ified: analog, inter om and data.

The analog interfa e is for FSK (frequen y shift key) appli ations. The analog interfa e has 600

ohm isolation audio transformer. The analog voltage an be 0 to 3 Vpp.

The inter om interfa e is for 4 or 2 wire voi e ommuni ation. It onne ts to a handset with

mouth and ear pie e.

Sin e the analog and voi e signals are digitized, the voi e quality will not degrade as the distan e is

extended. For example, distan es to 30 km are typi al for a pair of TC8000's with 1300nm single

mode fiber front end.

The TC8000 has four RJ-11 ports on the rear side to hook to either handsets or ustomer's audio

devi es.

The TC8000 Data Card offers several different inter hangeable interfa es, su h as RS-232, RS-

422, RS-485, TTL and Dry Conta t Relay. It an be upgraded or re onfigured to virtually any

onfiguration; simply onta t the fa tory should the need arise.

Built-in power redundan y is standard. Opti al redundan y is available as an option. Fiber

Opti al onne tors are ST (FC is optional); ele tri al onne tors are RJ11. Power is 12VDC

(24VDC or -48VDC, are optional).

The TC8000 is based on modern FPGA (field programmable gate array) te hnology. As a result,

it benefits users by enabling optimum flexibility, low urrent onsumption, high reliability and

maximum MTBFs.