
TC12 General Handbook
666/HB/43100/000 Page vi Issue 9
TABLE OF CONTENTS
1. INTRODUCTION ............................................................................................................................ 1-1
1.1 Purpose....................................................................................................................................... 1-1
1.2 Related documents..................................................................................................................... 1-1
1.3 Definitions ................................................................................................................................... 1-1
1.4 Summary of Major Changes ....................................................................................................... 1-1
2. SPECIFICATION ............................................................................................................................ 2-1
2.1 Mains Voltage Ranges................................................................................................................ 2-1
2.2 Mains frequency range ............................................................................................................... 2-1
2.3 Mains Current ............................................................................................................................. 2-1
2.3.1 Instation ............................................................................................................................... 2-1
2.3.2 Outstation............................................................................................................................. 2-1
2.3.3 Test Sets.............................................................................................................................. 2-1
2.4 Temperature and Humidity Requirements.................................................................................. 2-1
2.5 Size and Weight.......................................................................................................................... 2-2
2.5.1 Instation ............................................................................................................................... 2-2
2.5.2 Outstation............................................................................................................................. 2-2
2.5.3 Instation Test Set................................................................................................................. 2-2
2.5.4 Outstation Test Set.............................................................................................................. 2-2
2.6 Approvals .................................................................................................................................... 2-2
2.6.1 British Telecom .................................................................................................................... 2-2
2.6.2 Department of Transport...................................................................................................... 2-2
2.6.3 Other Approvals................................................................................................................... 2-2
2.7 General Overview ....................................................................................................................... 2-3
3. MODEM USERS GUIDE................................................................................................................ 3-1
4. SYSTEM HARDWARE................................................................................................................... 4-1
4.1 General ....................................................................................................................................... 4-1
4.2 UTC Traffic Control Computer System....................................................................................... 4-1
4.3 Instation....................................................................................................................................... 4-1
4.4 Test Sets..................................................................................................................................... 4-2
4.4.1 Instation Test Set................................................................................................................. 4-2
4.4.2 Outstation Test Set.............................................................................................................. 4-2
4.5 Freestanding Outstation.............................................................................................................. 4-2
5. SYSTEM FACILITIES..................................................................................................................... 5-1
5.1 General System .......................................................................................................................... 5-1
5.1.1 Baud Rate............................................................................................................................ 5-1
5.1.2 Modem Signal Levels .......................................................................................................... 5-1
5.1.3 Connection to Leased Telephone Line................................................................................ 5-1
5.1.4 Number of OTUs per Line ................................................................................................... 5-2
5.2 Instation Facilities ..................................................................................................................... 5-11
5.2.1 The System Fault Indication Panel.................................................................................... 5-11
5.2.2 Modem fault indication....................................................................................................... 5-11
5.2.3 Fault Actions ...................................................................................................................... 5-11
5.2.4 PSTN Modem .................................................................................................................... 5-11
5.2.5 TC8 Integration.................................................................................................................. 5-11
5.2.6 Digital Output Facilities...................................................................................................... 5-11
5.3 Free-standing Outstation Facilities ........................................................................................... 5-13
5.3.1 Handset.............................................................................................................................. 5-13
5.3.2 OTU Inputs and Outputs.................................................................................................... 5-13
5.3.3 Indicators ........................................................................................................................... 5-13
5.3.4 Fault Action........................................................................................................................ 5-13
5.3.5 Remote Controller Handset............................................................................................... 5-13
5.3.6 Instation Communications Method .................................................................................... 5-14
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