Guardian Technologies DVST, 150-175 User Manual

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DVST Installation Guide January 1996

DFT-0150

INSTALLATION GUIDE

Dedicated Micros UK Ltd.

11, Oak Street, Swinton, Pendlebury.

Manchester.

M27 4FL.

United Kingdom.

Direct Telephone: [phone] Direct Fax: [phone]

Outside UK. Telephone: Int +(44) 161 727 3241 Fax: Int +(44) 161 794 4464

Dedicated Micros U.S.A. Inc.

11515 Sunset Hills Road, Reston, Virginia 22090, U.S.A.

Telephone: Int +[phone] Fax: Int +[phone]

Dedicated Micros (Australia) PTY.

Unit 1, 30 Leighton Place, Hornsby NSW2077, Australia.

Telephone: Int +[phone] Fax: Int +[phone]

Dedicated Micros (Asia) Ltd.

1 Tannery Road, #05-04/05 Cencon 1, Singapore 1334
Telephone: Int +(65) 741 0138 Fax: Int +(65) 741 0221

Dedicated Micros (Belgium) Ltd.

Interleuvenlaan 64, B-3001 Leuven, Belgium

Telephone: Int +(32) 16 40 12 28 Fax: Int +(32) 16 40 02 43

.

© Dedicated Microcomputers Group Ltd. 1995

All rights reserved. No part of this publication may be

reproduced or distributed in any form or by any means

without the prior written permission of the publisher.

Dedicated Micros Ltd Page i

6April1995 DVSTInstallationGuide

Microcom ® is a registered trademark of:
Microcom Systems, Inc.

Gandalf ® is a registered trade mark of:
Gandalf Digital Communications Ltd.

Page ii Dedicated Micros Ltd

DVSTInstallationGuide Safety

Safety

ReadInstructions-Allthesafetyandoperatinginstructionsshouldbereadbeforetheunitisoperated.

Retaininstructions-Thesafetyandoperatinginstructionsshouldberetainedforfuturereference.
Heed warnings - All warnings on the unit and in the operating instructions should be adhered to.
Follow instructions - All operating and user instructions should be followed.
Cleaning - Unplug the unit from the outlet before cleaning. Do not use liquid cleaners or aerosol

cleaners. Use a damp cloth for cleaning.

Attachments -Do notuse attachments not recommended bythe productmanufacturer as they may

cause hazards.

Water and Moisture - Do not use this unit near water - for example, near a bath tub, wash bowl,

kitchensink,orlaundrytub, in awetbasement,nearaswimmingpool,inanunprotected
outdoor installation, or any area which is classified as a wet location.

Accessories-Do notplacethisuniton anunstablestand,tripod,bracket, or mount.Theunitmay fall,

causingseriousinjurytoa person and seriousdamagetotheunit.Useonlywithastand,
tripod, bracket or mount recommended by the manufacturer, or sold with the product.
Anymountingoftheunit should followthemanufacturer’sinstructions,andshouldusea
mounting accessory recommended by the manufacturer.

Anappliance andcart combinationshouldbe movedwith care. Quickstops, excessive

force,andunevensurfacesmaycausetheapplianceandcartcombinationtooverturn.

Ventilation-Openingsinthe enclosure areprovidedforventilationandtoensurereliableoperationof

the unit and to protect it from overheating. These openings must not be blocked or
covered.This unitshouldnot beplacedin a built-ininstallationunless properventilation
is provided.

Power Sources - This unit should be operated only from the type of power source indicated on the

manufacturer’s label. If youare notsure ofthe typeof thepower supplyyou planto use
consult your appliance dealer or local power company. For units intended to operate
from battery power, or other sources, refer to operating instructions.

Grounding or Polarization- Thisunitmay beequipped withapolarized alternating-currentline plug

(aplughaving onebladewiderthan the other).Thisplugwill fit intothepoweroutlet only
one way. This isa safetyfeature. Ifyou areunable toinsert theplug fullyinto theoutlet,
try reversingthe plug.If the plug should stillfail tofit, contactyour electrician toreplace
your obsolete outlet. Do not defeat the safety purpose of the polarized plug.

Alternatelythisunit may beequippedwitha3-wire grounding-type plug,aplughavinga
third (grounding) pin. This plug will only fit into a grounding-type power outlet. Thisis a
safetyfeature. Ifyouare unable toinsertthe plugintothe outlet,contactyourelectrician
to replace yourobsolete outlet.Do notdefeat thesafety purposeof the grounding- type
plug.

Power-Cord Protection - Power-supply cords should be routed so that they are not likely to be

walked on or pinched by items placed upon or againstthem, payingparticular attention
to cords at plugs, convenience receptacles, and the point where they exit from the
appliance.

Overloading-Donotoverloadoutletsandextensioncordsasthiscanresultinafireorelectricshock.
Objectand Liquid Entry-Never push objectsofany kind intothisunit through openingsasthey may

touch dangerous voltage points or short-out parts that could result in a fire or electric
shock. Never spill liquid of any kind on the unit.

Dedicated Micros Ltd Page iii

Safety DVSTInstallationGuide
Servicing - Do not attempt to service this unit yourself as opening or removing covers may expose

you to dangerous voltage of other hazards. Refer all servicing to qualified service
personnel.

Damage Requiring Service - Unplug the unit from the outlet and refer servicing to qualified service

personnel under the following conditions:

(a)When the power-supply cord or plug is damaged.
(b)If liquid has been spilled, or objects have fallen into the unit.
(c)If the unit has been exposed to rain or water.

(d)If the unit does not operate normally by following the operating instructions. Adjust
only those controls that are covered by the operating instructions as an improper
adjustmentof othercontrolsmay resultin damage andwill often requireextensive work
by a qualified technician to restore the unit to its normal operation.

(e)If the unit has been dropped or the cabinet has been damaged.

(f)When the unit exhibits a distinct change in performance this indicates a need for

service.

Replacement Parts -When replacementpartsare required,be suretheservice technicianhas used

replacement parts specified by the manufacturer. A replacement lithium battery is
available from Dedicated Micros Ltd.

Safety Check - Upon completion of any service or repairs to this unit, ask the service technician to

perform safety checks to determine that the unit is in proper operating condition.

Coax Grounding - If an outside cable system is connected to the unit, be sure the cable system is

grounded.

UNPACKING- Theshippingcartonis thesafestcontainer inwhichtheunit maybetransported. Save

it for possible future use.

WARNING - TO PREVENT FIRE OR SHOCK HAZARD, DO NOT EXPOSE THIS EQUIPMENT TO

RAIN OR MOISTURE.
The lightning flash with arrowhead symbol within an equilateral triangle is intended to

alert theuser of this equipment that there aredangerous voltages withinthe enclosure
which may be of sufficient magnitude to constitute a risk of electric shock.

The exclamation point within an equilateral triangle is intended to alert the user to the
presence of important operating and maintenance (servicing) instructions in the
literature accompanying the appliance.

Page iv Dedicated Micros Ltd

DVSTInstallationGuide RegulatoryNotes

Regulatory Notes

FCC AND DOC INFORMATION
(U.S.A. and Canadian Models Only)
WARNING

Thisequipment hasbeen testedand found tocomply withthe limits fora ClassA digital
device, pursuant to part 15 of the FCC rules. These limits are designed to provide
reasonableprotection againstharmfulintereference when theequipmentis operatedin
a commercial enviroment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this
equipment ina residentialarea islikely tocause harmful interference in which case the
user will be required to correct the interference at his own expense.

If necessary, the user should consult the dealer or an experienced radio/television
technician forcorrectiveaction. The usermayfindthefollowingbooklet prepared bythe
Federal Communications Commission helpful: “How toidentify and Resolve Radio-TV
Interference Problems”. This booklet is available from the U.S. Government Printing
Office, Washington, DC20402, Stock No. 004-000-00345-4.

This reminder is providedto callthe CATVsystem installer’sattention toArt. 820-40of
the NEC that provides guidelines for propergrounding and, in particular,specifies that
thecable groundshallbeconnected tothegroundingsystem ofthebuilding, as closeto
the point of cable entry as practical.

CE Mark

Thisproductis markedwiththeCEsymbol andindicatescompliancewiththe European
Community EMC directive 89/336/EEC.

This mark indicates that this product meets the following technical standards.

•

EN55022 1987-“Limits andMethodsof MeasurementofRadio Interference
Characteristics of information Technology Equipment”.

•

BSEN50082-1 -“Electromagnetic compatibility -Generic immunitystandard
Part 1: Residential, commercial, and light industry”.

•

IEC 801-2 1984, IEC 801-2 1991 - “Electromagnetic compatibility for
industrial process measurement and control equipment Part 2: Electrostatic
discharge requirements”.

•

IEC 801-3 1984 - “Electromagnetic compatibility for industrial-process
measurement and control equipment Part3: Radiated electromagnetic field
requirements”.

Dedicated Micros Ltd Page v

RegulatoryNotes DVSTInstallationGuide

IEC 801-4 1988 - “Electromagnetic compatibility for industrial-process

•

measurement and control equipment Part 4: Electrical fast transient/burst
requirements”.

A “ Declarationof Conformity” inaccordance with theabove standardshas beenmade
and is recorded at: Dedicated Micros Ltd., Pendlebury, Manchester, England.

Page vi Dedicated Micros Ltd

DVSTInstallationGuide TableofContents

Table of Contents

1 Introduction 1

1.1 DFT-0150 Transmitter 1

1.2 Telemetry 1

1.3 Event monitoring (Alarm) option 1

1.4 Audio option 1

2 Unpacking the unit 3

2.1 Items in packing 3

2.2 Packing the DVST 3

3 Operation 5

3.1 Callback 5

3.2 Alarms feature 5

3.3 Freeze all alarms 6

3.4 No frozen images 6

3.5 Offline frozen alarm 6

3.6 Track last alarm 6

4 Installation 7

4.1 Rear Panel connections 7

Fig: 1 Rear panel layout
Key to Fig: 1

4.2 Power inputs 8

4.3 37 way alarm connecton 8

Fig: 2 Alarm input/output connections

5 Setup 9

5.1 What you require 9

5.2 Setup using a PC 9

5.3 Remote setup 10

5.4 DVST commands 10
HELP
QUIT
RESET
VIEW

5.5 Define camera inputs 11
MAX=nn
COL=nn
MON=nn
CAMnn=5.6 Auxiliary port 3 11
AUX=

5.7 Define auxiliary ports 1,2,3 12
PORT=

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TableofContents DVSTInstallationGuide

6 Demonstration Mode 13

6.1 Demonstration mode 13
DEMO=
EXTCLK=

6.2 Demo cable 14

Fig: 3 Wiring details for demo cable

6.3 Connecting the demo cable 15

Single cable operation

Fig: 4 Demo Cable Connections

7 Modems 17

7.1 PSTN connection (modem) 17

7.2 MODEM commands 17
MODEM=
MODEM
MBAUD=
MODEM2
PORT=

7.3 Modem configuration strings 19
MODSTR=
MOD2STR=
USER=...
SEND
DIAL=

7.4 Modem operation 21

7.5 Connecting a modem in direct mode 22

Call request
Call answer request
Call disconnect.
Configuration of modem in direct mode

7.6 Using a modem in ATMODE 23

Call request
Call answer request
Call disconnect

7.7 General settings for modems in ATMODE 23

All modems:
Synchronous modems:
Asynchronous modems:

7.8 MOTOROLA VFAST 25

Country specific settings
No dialtone
Transmission speed

7.9 Microcom V3242 27

Syncronous mode :
DIP switch settings synchronous operation
DIP switch settings asyncronous operation

7.10 Trailblazer 28

Async mode

7.11 OCTOCOM OSI 8196A 29

Page viii Dedicated Micros Ltd

DVSTInstallationGuide TableofContents

8 Terminal Adapters 31

8.1 ISDN connection (Terminal Adapter) 31
DUALISDN=
ISDN=

8.2 Connecting a terminal adapter in direct mode 32

Making a Call
Answering a Call
Call disconnection
Configuring a terminal adapter for direct mode operation

8.3 Gandalf TA1 33

Direct mode

8.4 ASCOM 5000 / CITAM 34

ATMODE

Fig 5: ASCOM internal dip switch settings (ATMODE)

X21

Fig 6: ASCOM internal dip switch settings (X21)

8.5 Dataflex TA 38

9 Leased Line Transmission 39

9.1 Leased line terminology 39

9.2 DVST set up for leased line operation 39

9.3 Lleased line operation 40

9.2 ASCOM 64000 baseband modem 41

10Calls 43

10.1 Passwords 43
PASSWORD=
PASSn=
SPASSWORD=

10.2 On screen titling 44
SYSTEM=
TIME=
DATE=
TLPOS=
TDPOS=

10.3 Telephone number entries / connection commands 45
TELn=
TELn
TYPEn=
TIMER=
DIALCLR=

10.4 Callback 46
CALLBACK=

11Images and Transmission 47

Screen display - periscope mode

11.1 Image size 47
Target image size =

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TableofContents DVSTInstallationGuide

12Alarms & Events 49

12.1 Purpose & intended use 49

12.2 Alarm connections 49

12.3 ALARM settings 49
ASYS=
AON=n
AOFF=n
ANOnn
ANCnn

Images transmitted on alarm

ATYPEn=
AOUT=
ALMODE=
ADIAL=n

13Audio 53

13.1 Equipment required but not supplied 53

Fig: 7 End Panel Layouts

13.2 Connectint the DAL100 54

Microphone
Speaker
Power supply
DVST connections
Set port usage

Fig: 8 Microphone Connection

14Cable Assemblies 55

14.1 X21 to V35 cable assembly 56

14.2 X21 cable assembly 57

14.4 V24 SYNC cable assembly 58

14.5 RS232 cable assembly (DVST-PC) 59

14.6 RS232 cable assembly (DVST-DAL) 60

15Glossary 61
16Returns Procedure 63

Pagex Dedicated Micros Ltd

DVSTInstallationGuide Introduction

1 Introduction

DVSTis thegeneric namefor a rangeof productsdesigned to storeand transmitdigital
pictures at a higher quality and speed than previously possible.

1.1 DFT-0150 Transmitter

The DFT-0150 (Digital Fast Transmission) transmitter will process the imagesfrom up
to sixteen cameras for transmission or reception over ISDN or PSTN telephone lines.

1.2 Telemetry

The DFT 0150 can control telemetry cameras at the local site using built in telemetry
equipment.

1.3 Event monitoring (Alarms)

Theinternalalarmverification system forDFT0150transmitterallowstheunittomonitor
and act onexternal events.This canfreeze a picturefrom thecamera thatcorresponds
to a specific alarm input. The unit will then transmit this picture to the receiving station
where the operator can acknowledge the event and take relevant action.

This versatile alarm interface is a light duty 16 input / 2 output unit.

1.4 Audio option

Audio transmission is available allowing two way, half duplex, (one way at a time)
communication. (Transmission medium must be 19200baud or faster)

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Introduction DVSTInstallationGuide

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Page 2 Dedicated Micros Ltd

DVSTInstallationGuide Unpackingtheunit

2 Unpacking the unit

2.1 Items in packing

Theunitshouldbecarefullyunpackedandthepackingmaterialsretained.Checkthatall
the contents on the following checklist are present:

q

q

q

q

DVST Unit
Power Lead with molded IEC connector
Rack mount conversion kit
Installation Guide

2.2 Packing the DVST

If the DVST is to be returned for repair or transported to another location the original
packing should be used.

The unit should first be wrapped in the polythene bag. The preformed end pieces are
thenplaced ateithersideof theunitwhich can thenbeplaced insidethecardboardbox.
The box should be firmly sealed using appropriate tape.

If the unit is to be returned for repair ensure a valid returns note is clearly written
on the side of the box.

Dedicated Micros Ltd Page 3

Unpackingtheunit DVSTInstallationGuide

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Page 4 Dedicated Micros Ltd

DVSTInstallationGuide Operation

3 Operation

3.1 Callback

The callback feature allows an operator at a monitoring station to call a DFT0100
transmitter onsite and configure the unit to automaticallycall them back,ensuring that
the telephone call is charged to the transmitting and not the receiving site.

On sending a callback request, the monitoring station disconnects and waits for the
transmitting site to call back. With callback enabled, connection time is approximately
twice that of normal connection time.

3.2 Alarms Feature

Thealarmsystemforthe DFT0150 transmitterallowstheunittofreezethepicturesfrom
camerasthatcorrespond with thealarminputsthathave been triggered.Thesepictures
are then transmitted to a receiving station where they can be acknowledged and the
relevant action taken.

On an alarm the transmitter will automatically call the telephone number stored in
telephone entry 0.

If this number is busy then it will call the number stored in telephone entry 1. The
maximum number of telephone entries can be set between 1 and 16.

Ifthe fallback numbersarebusy thetransmitter will automaticallykeep callingbetween
telephone entries 0 and 1 until onebecomes free. However theuser can configure the
DFT0150 to automatically call upto four numbers unitl one becomes free.

Dependingonhowthe transmitter hasbeenconfigured,incomingalarmsarehandledin
different ways.

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Operation DVSTInstallationGuide

3.3 Freeze All Alarms

Eachalarm activationstoresthe correspondingcameraimage and transmitsthe frozen
image to the receiver.

The frozenpictures witha record of the time,date andcamera numberwill be storedin
memory until the alarms have been acknowledged.

3.4 No Frozen Images

No frozen images are sent on alarm. If several alarms ocour to trigger the machine to
dial,oneshotfromeachwillbesentinquicksuccessionwithoutanyoperatorcontrol.

Anyalarmspresentwhilstonlinewillbeindicatedonthereceiveunitdisplaybaseline.

3.5 Offline Frozen Alarm

The first alarm activation stores the corresponding camera image and transmits the
frozen image to the receiver.

3.6 Track Last Alarm

With this mode no frozen images are sent.
If several alarms ocour to trigger the machine to dial, one shot from each alarmwill be

sentin quicksuccession without anyoperator control,followingan intruder.Any alarms
present whilst on line will be displayed full screen and un frozen.

Page 6 Dedicated Micros Ltd

DVSTInstallationGuide Installation

4 Installation

The DVST Transmitter is supplied as a wall mounted unit.

4.1 Rear Panel connections

The DVST Transciever uses BNC connectors for all video inputs and outputs. Other
data connections are made via standard D type connectors. The optional keyboard is
connected by a 9 pin D type female plug.

Fig: 1 Rear panel layout

WARNING: DO NOT CONNECT THE UNIT TO OTHER EQUIPMENT WITH POWER ON.

Key to Fig: 1

1 Cmaera Inputs 4 Modem 7 AUX3 10 Alarm Inputs 13 ISDN
2 ISDN 1 5 AUX 1 8 IIc Socket 11 Power Connection Connection
3 ISDN 0 6 AUX 2 9 Telemetry Out 12 Integral Dataflext TA Unit

Dedicated Micros Ltd Page 7

Installation DVSTInstallationGuide

4.2 Power Inputs

The DVSTTransmitter ispowered via a standard mainsIEC cablewhich plugs intothe
rear panel. Power cable retaining clip prevents the cable from dropping out.

Thepowersupplyisselfadjusting to themainsinputandcanacceptavoltagefrom90to
260 volts.

Mains supply frequency can be either 50 or 60 cycles.

4.3 37 Way Alarm Connections

Fig: 2 Alarm input/output connections

Page 8 Dedicated Micros Ltd

DVSTInstallationGuide Setup

5 Setup

5.1 What you require

Setup of the DVST DFT-0150 is undertaken using a PC (Personal Computer)
connected to the AUX0 port on the front panel.
To set up the DVST using a PC you will need the following:

A personal computer with an RS232 port.
A connection cable between the serial port of the computer and the serial port
(AUX3) of the DVST unit. (Details are in the cable section of this manual)
AsuitablecommunicationsprogramforyourPCthatcanoperateat9,600baud.
i.e. Procomm.

5.2 Setup using a PC

Procedure:

Turn off the power supply to the DVST and the PC.
Connect the two units together using a serial cable.
Power up both DVST and the PC then start the communication program.
Make sure that the speed and protocol of the communications program are as
follows:

Baud Rate=9,600
Parity=None
Data Bits=8

Stop Bits=1
Local setup mode can be entered by typing “ +++<ret>” or for MCI commands<ESC>
M\Setuponthekeyboard.TheDVSTcommandswillappearonthescreenofthePC.

If a password has been set the screen will go blank and the prompt PASSWORD> will
appear on the screen and a valid password must be entered followed by pressing the
<ENTER> key. If this enteredcorrectly the prompt CMD> will appear on screen. More
details on the operation of passwords appear later in this manual.

Typing HELP and pressing the <ENTER> or return key will list all the available DVST
commands.These are listedwithbrief descriptions toassistusers familiar withsetup of
theDVST.Allthesecommandsareexplainedindetailwithinthemanual,andhavebeen
grouped in a logical order to make set up of the DVST easy.

Typing VIEW andthen pressing<ENTER> willlist the presentsettings ofthe DVST.To
exit the SETUP mode type QUIT then <ENTER>.The DVST will then return to normal
operation.

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Setup DVSTInstallationGuide

5.3 Remote Setup

RemoteDVST unitscan alsobeset upin the samemanner asalocal DVST.The same
procedure should be followed when the DVST is on line to a remote unit. When the
SETUP key is pressed the screen will go blank and the command prompt REM> will
appear on screen.

Proceed as for the local system.

Note: A PC cannot initiate remote set up with the “+++” command.

5.4 DVST Commands

Most commands aretyped indirect andterminated bypressing the<ENTER> keyon a
PC.

HELP

Note: Paragraphs 4.6 onwards detailthe command information listed by thehelp option and

have been grouped together in thelogical order thatshould be used when setting up a
DVST system.

QUIT

This returns the DVSTto normaloperation. Ifa MODEMis connected
and the DVST is set to MODEM=ON the initialisation strings will be
sent to the MODEM.

RESET

This command is used to completely reset the DVST system.
(All values are reset to their default values.)

Lists all commands available.

Exits the SETUP mode.

Resets DVST to factory defaults

Note: These values are stored in an integrated circuit called an EEPROM. This is not

dependent on a battery backup and will retain its settings indefinitely without a power
supply.

VIEW

This will display all the current DVST settings.

Page 10 Dedicated Micros Ltd

Display current DVST settings

DVSTInstallationGuide Setup

5.5 Define Camera Inputs

MAX=nn

COL=nn

MON=nn

CAMnn=

Sets maximum number of cameras
(default, 8)

Range is 1 to 16.
Correct settings of this ensures that any receiving station does not

spend time trying to collect invalid camera inputs.

Set camera to Colour

Set camera to Monochrome

(default, all cameras set to colour)

Format is COL=01, COL=05 etc.
Format is MON=06, MON=15 etc.
It is important that camera inputs are correctly defined as colour or
monochrome.

Set camera title nn to ...
(default, Camera 01=CAMERA 01 etc.)

Format is CAM01=FRONT DOOR

5.6 Auxiliary Port 3

The auxiliary port 3 on theDVST can be used for programming theDVST with a PC or
for generating printer reports. Protocol is RS232 8 characters, no parity, one stop bit,
default at 9,600 baud.

AUX=

TERM is for terminal operation, control by PC.
PRINT operates as a printer connection.
MCI is for machine control interface.
DTMF is used to echo telemetry codes at the port.
ENG is used to display debug.
NULL turns the port off.

Note: Altering this command from aPC isvalid, butafter changingthe settingthe PCit willno

longercommunicate withtheDVST. Thereasonis thattheport hasnowbeen assigned
a different task. .

Set AUX port usage:

TERM, PRINT, MCI, DTMF, ENG, NULL

(default, ENG)

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Setup DVSTInstallationGuide

5.7 Define Auxiliary Ports 1,2, 3

The auxiliary ports 1, 2, 3 on the DVST can be configured to operate with additional
equipment i.e. printers, telemetry equipment and PC based conrol systems (MCI).

PORT=

Set PORT usage,

(Each field entry is separated by a space. If the
commands are entered correctly the new settings will
be displayed):

<AUX PORT> <BAUD RATE> <PARITY>

<DATA BITS> <STOP BITS> <FORMAT>

(default settings )
AUX1 N 8 1 38400 PKT
AUX2 N 8 1 38400 DATA
AUX3 N 8 1 9600 ENG

AUX PORTAUX1, AUX2, AUX3
BAUD RATE1200, 2400, 4800, 9600, 19200, 38400
PARITYN (None) O (Odd) E (Even)
DATA BITS5, 6, 7, or 8
STOP BITS1 or 2
FORMAT

Aux1DATACharacter based data operation

PKTPacket based operation
BLKBlock data operation
NULLTurn off port

Aux2DATACharacter based data operation
NULLTurn off port

Aux3TERMTerminal operation
PRINTSerial printer connection
MCIMachine control interface
DTMFSend telemetry codes to port
ENGDisplay debug messages
NULLTurn off port

Example
PORT = Aux3<space>9600<space>N<space>8<space>1<space>Term <return>

Page 12 Dedicated Micros Ltd