General; Introduction - ABB 1MRS119000 Operator's Manual

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General

Introduction

The 1MRS119000 modem board is a multifunctional plug-in modem board which can be
used together with several distribution automation products of ABB Transmit Oy. Via the
local public telephone network or leased lines the modem provides data communication at
up to 14400 bps. Furthermore, the modem can be connected to several types of radios for
communication via a radio-operated network.
This optional modem board is used for communication between aremotely contrlled unit or
a protection relay and a host computer. It is only delivered as part of such systems. The
modem board takes care of the data communication from station-level equipment to the host
computer via a public telephone network, leased lines or a conventional radio network.
The modem is designed according to the following international ITU-T recommenda-
tions for data signalling rates up to 14400 bps:
ITU-T V.21 300 bps
ITU-T V.22 1200 bps
ITU-T V.22bis 2400 bps
ITU-T V.23 1200/75 bps
ITU-T V.32 4800/9600 bps
ITU-T V.32bis 14400 bps
The line interface fulfils the NET 4 (ETS 300 001, second edition, April 1994) specifica-
tion for the agreed countries: "Attachments to Public Switched Telephone Network (PSTN);
General technical requirements for equipment connected to an analog subscriber interface
in the PSTN".
The AT command set is used for configuration of both the telephone modem and the
radio modem. Configuration is done via the RS 232 serial interface with help of a PC/
Terminal (DTE).
The remote configuration of the modem offers users network management capabilities.
The user can configure the modem at remote sites from local modems, without having to
visit the local stations or rely on the service personnel to follow instructions.