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Telex Unit (ATU)

Summary of Contents for ATU Telex Unit

Page 1: ...1 Telex Unit ATU ...

Page 2: ...not represent a commitment on the part of ATL Telecom Ltd No liability is accepted for any consequential losses resulting from errors or omissions from this document Head Office Sales Support Office ATL Telecom Limited Cypress Drive St Mellons Cardiff CF3 0EG UK Tel 44 0 29 20500700 Fax 44 0 29 20500701 2 ...

Page 3: ...ION MANUAL CONTENTS CE COMPLIANCE STATEMENTS SAFETY INSTRUCTIONS EMC WARNING STATEMENTS 1 INTRODUCTION 2 INSTALLATION STEPS 3 HOST SIDE CONNECTION DETAILS 4 CONFIGURATION 5 LED DISPLAY 6 USER RESPONSIBILITIES ATL Part No 1 267 000 610 ISSUE 4 March 2003 ...

Page 4: ...asily accessible 3 For continued protection against risk of fire replace with same type and rating fuse 4 The TELEX LINE connection has a safety status of TNV3 the Host and Printer AUX Interface port D Type connections have a safety status of EARTHED SELV and the mains connection has an EARTHED HAZARDOUS VOLTAGE STATUS SYSTEM SPECIFICATION The ATU is defined as a Front End Telex Terminal Apparatus...

Page 5: ...e lithium battery incorporated inside the ATU unit will react violently with water and most gases It is also important that batteries are not crushed incinerated or disposed of with normal waste Therefore the battery is classed as being NOT USER REPLACEABLE and the equipment should be returned to the manufacturer or agent if battery replacement is required 5 MANUFACTURERS DECLARATION ATL Telecom L...

Page 6: ... with any installation instructions issued by the Host equipment manufacturer There is only one control on the Telex Unit the RESET button that allows the user to execute a hardware reset of the Telex Unit Commands from the Host carry out any other necessary changes in its operating mode These include a reset command which must be entered each time the Telex Unit is powered up or the RESET button ...

Page 7: ...within cable reach of the mains supply host equipment telex line termination and standby teleprinter if installed The mains lead and telex connections provided with the Telex Unit are approximately 2 meters long The chosen site should be secure dry and avoid exposure to excessive heat from equipment room heating devices or direct sunlight The front panel should be visible so that the LED displays ...

Page 8: ...e Telex Unit and the method of security checking and flow control is correct mode of operation See section 3 for details vi Check Message After the HOST LED s have been extinguished the Telex Unit is ready for use in accordance with the Telex operating instructions for the host equipment If possible a test telex should be sent to another known location as a check that the system is operating corre...

Page 9: ...s for XON XOFF Security Checking by use of ENQ ACK This method of security checking involves the regular exchange of control characters between the Telex Unit and the Host The Telex Unit sends a Confidence Check enquiry character ENQ to the Host and expects to receive an OK character ACK in response After sending an ENQ the Telex Unit checks to see if an ACK has been received The Host must reply w...

Page 10: ...a 9 pin Female D type connector Pin AUX 1 Earth 2 Rx from unit to printer 3 TX not used in printer mode 4 DTR to the unit 5 0V common 6 DSR from the unit 7 RTS to the unit 4 CONFIGURATION Configuring the ATL Telex Unit The ATL Telex Unit is configured by changing the various options in the unit s software configuration menu accessed from a terminal session through the Host port This section contai...

Page 11: ...ticular installation Once configured the parameters will remain stored in non volatile memory for immediate use after power on The menu may be accessed from a dumb terminal connected to the Host port or direct from the Host system if this option is possible After sending ESC Z the Host must send either 0 which means no prompts or 1 which means prompts The following power up software reset defaults...

Page 12: ...ach byte Host Parity D Shows the Parity of each data byte Host Security E Shows the security being used by Host computer See section 3 for more information Host Flow Control Security F Shows the flow control being used by Host computer See section 3 for more information Printer Selected G Shows which printer has been selected for connection on the Auxiliary Port Note ATL will only provide support ...

Page 13: ...Ahead SO to the Host Printer Compulsory R This option indicates whether the presence of the printer overrides Host security such that continued acceptance of incoming calls is permitted when the host computer is in fault condition Drop Carrier on Line Closed S This option controls the state of the carrier presented to the telex line under a Closed Line condition The default value leaves the carrie...

Page 14: ...e unit In all cases except if Automatic Reset option is enabled the unit will initialise and send the R ENTER RESET message to the Host The unit is then brought back on line by sending ESC A If speed changes are made these are functional from the start of the output of the R ENTER RESET message 5 LED DISPLAY The 5 LED s on the Telex Unit front panel provide a visual indication of the operational s...

Page 15: ...ion LINE NUMBER AND ANSWERBACK 1 The user is responsible for ensuring that the ATU is equipped with the line number and answerback agreed with the PTO for the circuit to which it is connected 2 The user shall not insert or change the line number and answerback but shall approach the supplier for this work to be undertaken 3 The user is responsible for ensuring that on any one line only the line nu...

Page 16: ...16 THE INFORMATION CONTAINED IN THIS DOCUMENT IS CONFIDENTIAL TO ATL TELECOM LTD AND MAY NOT BE DISCLOSED OR REPRODUCED IN WHOLE OR IN PART WITHOUT THEIR WRITTEN CONSENT ATL TELECOM LTD 2003 ...

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