Installation Instructions Part 3

Contents
1 Introduction .................................................................................................3
1.1 The Mobitex System ........................................................................3
1.2 BRU3 Presentation........................................................................... 4
1.2.1 Technical Performance ......................................................... 5
2 Preparations Before Installation .................................................................. 7
2.1 Storage..............................................................................................7
2.2 Transport ..........................................................................................7
2.3 Before Installation............................................................................ 7
2.3.1 Material and Tools That Are Not Provided by Ericsson ...... 8
2.4 Space Required.................................................................................9
2.4.1 General................................................................................ 10
2.4.2 Above the BRU3................................................................. 10
2.4.3 Below the BRU3................................................................. 10
2.4.4 On both sides of the BRU3................................................. 11
2.4.5 In front of the BRU3........................................................... 11
2.4.6 Installation Alternatives...................................................... 11
3 Power Requirements.................................................................................. 14
4 Cables and External Connections.............................................................. 15
4.1 General...........................................................................................15
4.2 Connecting Power.......................................................................... 18
4.3 Connecting Network Communication............................................ 21
4.3.1 Integrated V.32 Telephone Modem.................................... 23
4.3.2 Unbalanced serial port, RS 232C........................................ 24
4.3.3 Balanced serial port, RS 422B............................................ 25
4.4 Connecting the Alarm .................................................................... 26
4.4.1 Alarm Loop for Customer’s Use ........................................27
4.5 Connecting the Antenna................................................................. 29
5 Grounding.................................................................................................. 31
6 Connecting Antenna Cables and Mounting Antennas...............................32
7 Lightning Protection.................................................................................. 35
Site Requirements
BRU3 MANUAL, Doc.no: 1533-ANNA 805 08 Uen, Rev H, 2003-06-11