INTRODUCTION

SECTION 1 INTRODUCTION
1.1 SCOPE OF MANUAL

This manual describes the 3000 Series Switch modules and the alignment instructions for these modules. This manual is not intended to explain the entire Multi-Net®system, just the 3000-Series Switch segment. For parts list, schematic diagrams, and circuit board component layout information, refer to the 3000 Series Switch Service Manual, Part No. 001- 3139-102. For more detailed information on the operation of the entire system, refer to Multi-Net Application Note, Part No. 009-3039-004CD.

1.2 DEFINITIONS

The following are brief definitions of terms and their usage as they are applied to the Switch.

1.2.1 TRUNKED SYSTEM

Refers to systems which pool multiple channels and use automatic switching so that all system users can access any repeater channel that is not in use. This results in minimum waiting to make a call.

1.2.2 LTR TRUNKED SYSTEM

The LTR® (Logic Trunked Radio) systems utilize a concept called trunking. Trunking makes all repeater channels on a system automatically available to the users. This is done by logic control system that continually monitors the system and updates the mobiles and repeaters using data messages. These data messages tell the mobiles which repeater channels are free and can be accessed if a call is to be made.

1.2.3 MULTI-NET TRUNKED SYSTEM

A trunking system similar to the LTR Trunked System, but which offers a number of additional and enhanced features.

1.2.4 CONVENTIONAL SYSTEM

Refers to systems which are licensed on a single repeater channel. Operation is similar to that of a community repeater because there is no automatic access to several repeater channels.

1.2.5 3000 SERIES SWITCH

The Switch connects several forms of communication together in a “Network” that allows communication between users in the system.

1.2.6 CALL PROCESSOR

The Call Processor controls the databases for the Switch and provides processing for certain types of calls within the system.

1.2.7 SYSTEM AND SUBSCRIBER MANAGER

The Switch along with the System and Subscriber Manager control the Multi-Net System. The System and Subscriber Manager is an IBM® PC or compatible computer that is running the Johnson management program. The System and Subscriber Manager is used by the System Manager to program, control and continuously monitor Switch operation. Refer to System and Subscriber Manager Operating Manual, Part No. 002-3139-078CD for more information.

1.2.8 REPEATER SITE

A location where one or more repeaters are housed. Trunked system repeaters are connected to the same high-speed data bus and are required to be located close together.

1.2.9 HOME REPEATER CHANNEL

All mobiles have one site repeater channel assigned as their “Home” repeater. The Home repeater and Group ID information identifies mobiles for standard dispatch calls.

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