System Overview
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The ST-510 also adds valuable features to the basic SmarTrunk II protocol:
• Multi site Roaming
• No Routing Digit required
• Sharing of PSTN lines
• Larger Call Record database
• More customer profiles available
• More Subscriber ID codes
• Local & remote system management
• Remote site telemetry late to join radio is automatically sent to group call if
call is in progress
• Lost radio can rejoin a group while call is in progress
ST-510 SYSTEM COMPONENTS
CPU: The heart of the ST-510 is a rugged, fault tolerant industrial PC with
DSP (digital signal processing) resources. The PC runs all the software rou-
tines required for the switch control and the services supported. The switch
also assumes many functions normally supported by the SmarTrunk II con-
troller, such as data base maintenance, subscriber validation and call record
accounting.
Switch Rack & Power Supply: The ST-510 system components are mounted
in a standard 19" rack panel with eleven slots to accommodate the switching
components plus the power supply. Additional rack panels may be added to
the system as required.
Each rack panel includes a power supply that provides the required system
voltages and supervises the overall system performance and serve as back-up
to power supplies of other racks.
ST-422 Switch Board: All system switching and interface functions are per-
formed by the ST-422 Switch Board. The ST-422 contains a micro-controller,
an analog matrix switching structure, plus a highly versatile analog input/
output with adjustable levels for each incoming or outgoing path. The ST-422
also has an RS-232 data port for digital interconnection with any external
device.
By use of an on-board DIP switch, the ST-422 can be easily configured for
several different system functions:
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