Verilink AS420 (34-00294) Product Manual Uživatelský manuál

iAS420E1 Digital Loopback (EDL) Device34-00294.2May 2000

2 AS420 Reference Manual

General 3CHAPTER1CHAPTER 1GENERALIntroductionThe AS420 is an E1 Digital Loopback device (EDL). This device allows network management centers to remote

4 AS420 Reference ManualSpecificationsGeneric Interface Requirements (120 Ω Ω Ω Ω and 75 ΩΩΩΩ)E1 InterfaceLine Rate: 2.048 Mbps (± 32 ppm) Framing:

General 575 Ω Ω Ω Ω TerminationInterface: BNC - coaxImpedance: 75 Ω, unbalancedTimingNetwork E1: 2.048 Mbps (±50ppm)T1: 1.544 Mbps (±50ppm)InternalE

6 AS420 Reference ManualCanadaCanadian Safety CSA C22.2, No. 950-95USFCC Compliance Part 15, Class AUS Safety UL 1950, 3rd EditionEnvironmental Operat

Installation and Configuration 7CHAPTER2CHAPTER 2INSTALLATION ANDCONFIGURATIONIntroductionThis chapter contains information and instructions required

8 AS420 Reference ManualSupplied MaterialsThe AS420 is shipped from the factory with the following standard equipment. •external AC power supply•refer

Installation and Configuration 9PowerPlug the connector from the power supply into the unit. Plug the transformer into an appropriate outlet. This app

10 AS420 Reference ManualNOTICE: Switch positions 5, 7, and 8 must remain in the default (Down) position for normal operation.T1 Mode SettingsFraming

Installation and Configuration 11Firmware Download ProcedureThis port is accessed through a direct connection. Configure the terminal for VT100 emulat

ii AS420 Reference ManualCopyright NoticeCopyright © 2000 Verilink Corporation. All rights reserved.This document does not create any express or impli

12 AS420 Reference ManualThe power bypass mode is done using relays that switch the network and equipment connections. When the unit is powered and st

Testing 13CHAPTER3CHAP T ER 3TESTINGIntroductionThis chapter describes the diagnostic and test features of the AS420. The unit is controlled manually

14 AS420 Reference ManualLoopbacksThe AS420 responds to remote loopup and loopdown codes from any channel in the framed E1 data stream. The resulting

Testing 15NetworkSetting the front panel rocker switch to NET activates a payload loopback where every frame of the E1 datastream received is looped b

16 AS420 Reference Manual

Terminal Operation 17CHAPTER4CHAPTER 4TERMINAL OPERATIONTerminal InterfaceThis chapter describes the screens structure and menu controls for the Veril

18 AS420 Reference ManualMain TitleThe main title (third line, center) denotes the general classification of functions currently accessible by the use

Terminal Operation 191 Pressing ENTER on such fields as (Reset) and (Start Test) simply executes the function.2The most common type of field in parent

20 AS420 Reference Manual

iiiCaution: Users should not attempt to make such connections themselves, butshould contact the appropriate electric inspection authority, orelectrici

iv AS420 Reference Manual

vTable of ContentsCopyright Notice ...

vi AS420 Reference ManualChapter 2 Installation and ConfigurationIntroduction ...

viiMain Title ...18Cur

viii AS420 Reference Manual

About This Manual 1CHAPTER 0ABOUT THIS MANUALWhat is a Reference Manual?This is a reference manual. It provides information about unit installation, c