Western Telematic MDS-16 Manuel utilisateur

WTI Part No. 12554

Rev. A

MDS Series

Multipurpose Data Switch

Models MDS-16 and MDS-8

Preliminary Draft

October 1995

User's Guide

5Sterling

Irvine

California 92718

(949) 586-9950

Toll Free: 1-800-854-7226

Fax: (949) 583-9514

http://www.wti.com

Table of Contents

1. Introduction .........................................1-1

2. Unit Description ......................................2-1

2.1. Front Panel.........................................2-1

2.2. Back Panel .........................................2-2

3. Getting Started .......................................3-1

3.1. Communication Parameters ..........................3-1

3.2. Connecting your PC to the MDS ......................3-2

3.3. Apply Power to the MDS ............................3-3

3.4. Communicating with the MDS Unit ...................3-3

4. Hardware Installation ................................4-1

4.1. Configure Setup Switches ............................4-1

4.1.1. Default Baud Rate (Sw1, Sw2, Sw3) ...........4-2

4.1.2. Default Handshake (Sw4) .....................4-2

4.1.3. Default Response Message Format (Sw5) .......4-3

4.1.4. Default Command Echo (Sw7).................4-3

4.2. Initialize the Unit to Default Settings ..................4-4

4.3. Connecting Devices to the MDS ......................4-4

5. Configuration ........................................5-1

5.1. Access to the MDS Command Mode...................5-1

5.2. Defining and Reading the Site I.D. ....................5-2

5.3. Port Configuration ..................................5-2

5.3.1. Configuration Conventions....................5-2

5.3.2. Port Modes..................................5-3

5.3.3. Command Availability........................5-3

5.3.4. Port Configuration Command..................5-4

6. Operation ............................................6-1

6.1. Any-to-Any Mode: ..................................6-1

6.1.1. Port Connection and Disconnection ............6-2

6.1.2. Defining Hunt Groups ........................6-6

6.1.3. Port Buffers and Any-to-Any Mode Ports .......6-8

6.2. Buffer Mode........................................6-9

6.2.1. Reading Data from Buffer Mode Ports ..........6-9

6.3. Mux Mode ........................................6-10

6.3.1. Bi-directional Communication in Mux Mode ...6-11

7. Saving Configuration Parameters ......................7-1

7.1. Sending Parameters to a File .........................7-1

7.2. Restoring Saved Parameters ..........................7-2

8. Command Reference Guide............................8-1

8.1. Command Conventions ..............................8-1

8.2. Command Response .................................8-2

8.3. Command Summary .................................8-3

8.4. Command Set.......................................8-4

Appendices

A. Description of System Interfaces ....................Apx-1

A.1. RS-232 Ports.....................................Apx-1

A.2. Snap Adapters ...................................Apx-2

A.3. Cables ..........................................Apx-3

B. Specifications......................................Apx-4

C. FCC Notice ........................................Apx-5

D. Customer Service ..................................Apx-6

List of Figures

2.1. Instrument Front Panel...................................2-1

2.2. Instrument Back Panel ...................................2-2

3.1. The MDS Help Screen ...................................3-4

3.2. The Status Screen .......................................3-4

5.1. Port Configuration Menu (Port 2 Shown) ...................5-4

6.1. The Any-to-Any Mode ...................................6-1

6.2. The Buffer Mode ........................................6-9

6.3. The Mux Mode ........................................6-10

8.1. The Status Screen .......................................8-5

A.1. RS-232 Port Connectors ...............................Apx-1

A.2. RS-232 Port Circuitry .................................Apx-1

A.3. Snap Adapter Interface ................................Apx-2

A.4. Snap Adapters........................................Apx-2

A.5. Straight Cables .......................................Apx-3

MDS Series Users Guide

1. Introduction

WTI's MDS-16 and MDS-8 Multipurpose Data Switches provide

a convenient means for connecting devices running at dissimilar

baud rates, and collecting and multiplexing data from multiple

sources.

Versatile Connectivity

Up to 16 different devices can be connected to the MDS without

the need to select a common baud rate or parity. Each port can

be individually configured for specific baud rates, parity,

handshaking format, and various other parameters and options.

Collecting Data from Multiple Sources

The Buffer Mode allows the MDS to collect data from up to

fifteen different devices and store that data for later retrieval.

The MDS provides 256K or 512K (optional) of non-volatile

buffer memory. Buffer memory is dynamically allocated.

Multiplexing Data

The Mux Mode allows the MDS to receive data from up to

fourteen different devices and multiplex that data out a common

port. The Mux Mode also features a bi-directional

communication command, which allows data or commands to be

sent from an Output Port to an Input Port.

Easy Set-Up and Operation

Configuration of the MDS is simple. A menuing system is used

to select communications parameters, and enable or disable

options. The MDS can easily adapt to the requirements of almost

any data communications application.

Limited Command Access

The MDS is ideal for situations that require limited access to

important commands. Each port can be configured to allow

access to all commands (Administrator), or only allow access to

basic commands (User).

1-1

Modular Design

RJ-11 jacks and RS-232 Modular Adapters provide quick, easy

connection to computers, modems, and other LAN hardware.

The MDS is compact and takes only one rack unit (1.75 inches)

of vertical rack space.

Modem Communication

The MDS can be controlled by a local PC that communicates

with the unit via cable, or controlled remotely via external

modem. ProComm® (or another communications program) is

used to send commands to connect ports or display status.

Configuration Backup

Once you have configured the MDS to fit your application,

parameters and options can be sent to an ASCII text file and

saved for future retrieval. If configuration is altered or deleted,

parameters can be reloaded using your communications program.

MDS-16 and MDS-8

This User's Guide discusses both the MDS-16 and MDS-8

Multipurpose Data Switches. The MDS-16 includes 16 ports,

and the MDS-8 includes eight ports. All other features function

identically.

Typographic Conventions

Throughout this manual, typefaces and characters have been used

to denote the following:

^(e.g. ^E) Indicates a key combination used to invoke a

command. For example, the text "^A"

(Control A) indicates the [Ctrl] key and

the [A] key must be pressed simultaneously.

COURIER FONT Indicates characters typed on the keyboard.

For example, /^E or /P 02.

[Bold Font] Text set in bold face and enclosed in

square brackets, indicates a specific key.

For example, [Enter] or [Esc].

<> Indicates required keyboard entries:

For Example: /P <n>

[] Indicates optional keyboard entries.

For Example: /W [n]

1-2

MDS Series Users Guide

2. Unit Description

2.1. Front Panel

¬CLEAR: Restarts the MDS operating program without

changing user-selected parameter settings or breaking

port connections.

ON: Lights when AC Power is applied to the unit.

®SET: Used to initialize the MDS to the defaults specified

by Setup Switch configuration. To initialize the MDS,

press and hold both the SET button and the CLEAR button,

release only the CLEAR button, and then release the

SET button.

Note:

When the MDS is initialized, all command-selected

parameters will be cleared, and the MDS will revert

to the default parameters specified by the current Set-

Up Switch configuration.

¯RDY: Flashes to indicate the unit is operational.

°ACTIVITY: The Activity LEDs light to indicate that a

corresponding port is receiving data. Note that the model

shown here is the MDS-16 (16 ports), model MDS-8 has

eight Activity indicators.

2-1

Figure 2.1: Instrument Front Panel

2.2. Back Panel

¬RS-232 PORTS: For connection to switched devices.

Accepts six wire RJ-11 cable. Note that the model shown

here is the MDS-16 (16 Ports), model MDS-8 has eight RS-

232 Ports.

·Port 1 is used for communication with the MDS during

set-up and configuration. When the MDS is initialized to

the default state, Port 1 is the only port with access to

All (Administrator) MDS commands.

·Port 1 can either be connected to a PC or modem.

Connection to a modem allows the MDS to be controlled

by a remote PC.

SETUP Switches: A bank of eight dip switches, used to

set baud rate, handshake, message type, and duplex mode.

®FUSE: Use only 250 V 1/8 amp slow blow fuse

¯AC: 115/220 V AC Selector Switch

°Power Switch: Applies AC Power to unit.

±LINE: Receptacle for AC Power Cord (included).

2-2

MDS Series Users Guide

Figure 2.2: Instrument Back Panel

3. Getting Started

This section provides a brief overview of the MDS's basic

capabilities, and describes tests that can be performed to

determine if the unit is operating properly.

3.1. Communication Parameters

The Setup Switches, located on the MDS Back Panel, are used to

select default settings for all MDS RS-232 ports. A label located

adjacent to the Setup Switches summarizes switch functions.

When the MDS is shipped from the factory, the Setup Switches

are configured for 9600 baud, 8 Bits-No Parity, DTR

handshaking, verbose command response, and no echo (all

switches down).

For the purpose of this overview, use the default Setup Switch

configuration. Set your communications program (e.g.

ProComm) to use the following parameters:

·9600 Baud

·8 Bits, No Parity

·DTR Handshaking

·Full Duplex

Using Other Parameters (Optional): If desired, the MDS can

be set to match the parameters used by the communications

program. Refer to the label on the bottom of the MDS, and

configure Setup Switches accordingly. After changing the Set-

Up Switches, initialize the MDS; press and hold the SET and

CLEAR keys, release CLEAR, and then release SET.

Note:

·Section 4.1 describes procedures for setting the

MDS to match the parameters used by your

communications program.

·If Setup Switches are changed, the new

configuration will not take effect until the MDS

is initialized.

3-1

3.2. Connecting your PC to the MDS

In order to set-up the unit, a PC must be connected to Port 1.

Port 1 is always used for communication during set-up. This is

because Port 1 is the only MDS port that will allow access to All

(Administrator) commands when the unit has been initialized to

the default state.

Note that after the unit has been installed and configured, other

ports can also be granted access to All (Administrator) MDS

commands. This allows any MDS port to function as a "Control

Port" after configuration is complete.

The MDS can either be controlled by a local PC that

communicates via cable, or controlled by a remote PC that

communicates via external modem. For the purpose of this

overview, a local PC running ProComm (or a similar

communications program), will be cable connected to

MDS Port 1.

Note:

Communication via Modem (Optional): If desired,

this overview can also be performed via modem.

Section 4.3 describes the procedure for connecting a

modem to the MDS.

Perform the following procedure to connect a PC to Port 1.

1. Attach an appropriate Snap Adapter to your PC COM port.

Make certain to connect to the PC COM port used by your

communications program.

a) For 25 pin PC COM ports, use the SA-12F Snap

Adapter supplied with the MDS.

b) For nine pin PC COM ports, use the SA-9F Snap

Adapter supplied with the MDS.

c) For a description of the Snap Adapter interface, please

refer to Appendix A.2.

2. Use the RJ-11 cable included with the unit, to connect

MDS Port 1 to the Snap Adapter installed in your PC COM

port. Note that the cable used for connection must be a six

wire, straight wired RJ-11 cable. Standard crossover

(phone) cables cannot be used.

3-2

MDSSeriesUsersGuide

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