User manual

eElectro Industries/GaugeTech Doc # E113-7-03-1.18 2-1

Chapter 2Chapter 2

Modem Option OperationModem Option Operation

2.1: Overview2.1: Overview

Substation Multiplexor with Modem Option provides a dependable solution for substation

telecommunication applications. This unit multiplexes 16 serial ports to one master port, providing

the ability to communicate and switch between multiple serial devices. This switch uses Modem

Manager Technology that allows the internal or an external modem to communicate without any

need to specifically program the modem for a particular device.

Substation Multiplexor works with any standard terminal program. Use Windows

HyperTerminal

(section 2.2), EIG’s Futura Communicator (section 2.3), Nexus Communicator (section 2.4) or other

communication software to configure the Substation Multiplexor.

Substation Multiplexor has three operating modes:

• Command Mode (sections 2.5–2.12)

In Command Mode, the Substation Multiplexor will accept commands from a computer. Use

Command Mode to configure the Multiplexor and/or check its status. Put the unit in Throughput

Mode to establish communication with the devices connected to the Slave Ports.

• Throughput Mode (sections 2.6, 2.12)

In Throughput Mode, Substation Multiplexor transfers data between the computer connected to

its Master/Modem Port and the device(s) connected to a selected Slave Port. The Substation

Multiplexor will not accept any commands while in Throughput Mode. To enter Command

Mode from Throughput Mode, send the escape string detailed in section 2.5.

• Boot Mode

Boot Mode is used for flash upgrading only as additional features become available. Boot Mode

is not covered in this manual.

New Features of the Substation Multiplexor:

• Line Feed: Version V3.1 will respond with Line Feed (LF) at the end of a message. So, if you

are using HyperTerminal, DO NOT check “Append line feeds to incoming line ends”.

• Programmable Hang-up and Reset Times: Choose NoReset, 5 min or 10 min (section 2.10).

• Default Start-up Slave Port: Select Port for Start-up and Reset (section 2.6).

• Choice of Start-up Mode: Select Command or Throughput Mode for Start-up (section 2.14).

• Password Protection: Password Protection for Command and Throughput Modes (section 2.15).

• Unit Status: Settings and Status displayed (section 2.9).