INTRODUCTION

1.2.10 STATUS REPEATER CHANNEL

The Status Repeater Channel is one repeater in a site that is designated to transmit update messages occurring on all other repeaters at the site. This repeater is available for voice traffic, but is not normally assigned as the Home repeater for any mobiles.

1.2.11 MONITOR REPEATER CHANNEL

This is the repeater channel that a mobile is currently monitoring for update messages. This repeater may be either the mobile's Home repeater or the site Status repeater. A special algorithm is used by the mobile to determine which is to be monitored. Generally, it is the last repeater that a valid data message was detected on.

1.2.12TELEPHONE INTERCONNECT AND DATA TRANSMISSION

Mobile transceivers can be used to access the Public Switched Telephone Network (PSTN) on the 800 and 900 MHz bands. However, this interconnect operation must be on a secondary basis to dispatch operation. An exception is when the trunked system or channel is assigned exclusively to one user. In addi- tion, interconnect calls in a private radio service must be related to the business activities of the particular user.

The actual connection to the public telephone system may take place at any location such as the repeater or a control station. The interconnect device can be separate or shared. Timers which limit the maximum length of transmissions are not required. However, the equipment must automatically turn off the transmitter within 3 minutes of the last transmission (except if another dispatch or interconnect call is initiated within this interval).

Data transmission and paging are also allowed on these frequencies. It also must be secondary to voice communication. Refer to applicable FCC rules and regulations for more information.

1.2.13PUBLIC SWITCHED TELEPHONE NETWORK (PSTN)

If interconnect calls are to be placed by mobiles or landside users to mobiles, the Switch is connected to the Public Switched Telephone Network. The specific mobiles which can place calls and other interconnect parameters are determined by how the system manager programs the Call Processor and by the programming of each mobile transceiver.

1.2.14PRIVATE AUTOMATIC BRANCH EXCHANGE (PABX)

The system has the ability to connect to a PABX or PBX. This allows mobile originated calls to use the dial access codes and the least cost routing facility of the PABX/PBX.

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