Verilink AS420 (34-00294) Product Manual Manuel d'utilisateur télécharger pdf (Page 11)

General 3

HAPTER

ENERAL

Introduction

The AS420 is an E1 Digital Loopback device (EDL). This device allows

network management centers to remotely activate an E1 signal payload

loopback to facilitate installation and troubleshooting of the E1 circuit. This

EDL device responds to proprietary codes, transmitted by remote test

equipment, which does not interfere with network maintenance elements that

belong to local postal telegraph (PTT) authorities.

Features

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Table top packaging

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100–240 VAC autoranging power supply

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BNC (75 ohm) and RJ-48C (120 ohm) NET and EQUIP connectors

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Compatible with fractional, full, or unframed E1 services

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LED status indicators

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DIP switch configurable

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Provides payload maintenance loop-back, towards network, on demand

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Provides DTE line loopback on demand

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Power bypass relays on EDL device to maintain E1 service to customer if the

EDL device loses power. Automatically terminates bypass mode when power

is restored to unit.

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SUPV port for local firmware upgrades

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Verilink AS420 (34-00294) Product Manual Manuel d'utilisateur Page 11