P1202MB62TP データシートの表示（PDF） - Teccor Electronics

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P1202MB62TP

100 mA, battrax quad negative SLIC protector

Teccor Electronics 

High Speed Transmission Equipment

Central Office Site

DS-1 Rate

Interface

(1.544 Mbps)

HDSL transceiver unit

HTU-C

784 kbps Full-Duplex loop

784 kbps Full-Duplex loop

< 12,000 ft, 200 kHz BW

+2.5 V signal level

2B1Q, ZO=135 W

Remote Site

HDSL transceiver unit

HTU-R

DS-1 Rate

Interface

(1.544 Mbps)

Figure 3.9 HDSL Overview

Protection Circuitry

Longitudinal protection is required at both the HDSL Transceiver Unit – Central Office

(HTU-C) and HDSL Transceiver Unit – Remote (HTU-R) interfaces because of the ground

connection used with loop powering. Two P2300SC MC SIDACtor devices provide

overvoltage protection and two F1250T TeleLink fuses (one on Tip, one on Ring) provide

overcurrent protection. (Figure 3.10) For the transceiver side of the coupling transformer,

additional overvoltage protection is provided by the P0080SA SIDACtor device. The

longitudinal protection on the primary coil of the transformer is an additional design

consideration for prevention of EMI coupling and ground loop issues.

HTU-C/HTU-R Interface Protection

F1250T

Tip

P2300SC MC

Ring

P2300SC MC

F1250T

Tip

Ring

F1250T

P2300SC MC

P2300SC MC

F1250T

Figure 3.10 HDSL Protection

P0080SA MC

TX

Power

Sink

HDSL

Transceiver

P0080SA MC

RX

© 2002 Teccor Electronics

SIDACtor® Data Book and Design Guide

3-9

http://www.teccor.com

+1 972-580-7777

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