7K • Chapter 1
1-2
Standard Hardware Features
Configuration
The standard 7K controller package consists of a main board mounted in a
mainframe cabinet, a set of mating connectors, and a manual. No options are
required to perform the most-often-needed repeater control functions.
Cabinet
The standard cabinet provides mounting for the main board and for optional
boards, and can be installed in a standard 19" wide equipment rack. The
cabinet is constructed of three parts: An iridite-plated chassis box, an iridite-
plated chassis cover, and a black front panel. The complete assembly is only 1-
3/4" high and 7" deep, allowing installation in any rack (including slim Motorola
racks).
Main Board
The 7K Main Board measures 6" deep by 9-3/4" wide, and can operate as a
stand-alone controller. The digital portion of the board contains the
microprocessor, memory, logic input/output, and real-time clock circuits. The
analog portion contains the DTMF encoder/decoder, audio crosspoint switch,
tone synthesis, and audio interface circuits. Three connectors (two DB25S and
one 2.5-mm power jack) are mounted on the main board. These connectors
protrude through cutouts in the rear of the cabinet, making the interior of the
cabinet free of wiring.
Optional Hardware Features
Telephone Interface Module
The Telephone Interface Module (TIM) is constructed on a 3" by 6" PC board,
and adds autopatch, reverse patch, and phone line control capabilities to the
7K. The module is registered with the FCC under Part 68 Rules, eliminating the
need for a separate telephone coupler. Transient protection and RFI filtering
are provided. All solid-state design eliminates mechanical relays. Built-in
electronic hybrid allows both half-duplex and full-duplex autopatch calls.
Supports both regenerated DTMF dialing and 10/20 PPS rotary dialing.
Speech Synthesis Module
The Speech Synthesis Module (SSM) is constructed on a 3" by 6" PC board,
and adds convenient, high-quality speech message capabilities to the 7K. The
SSM has its own microprocessor for controlling the speech synthesizer,
supplied with a large vocabulary. A third-order lowpass filter smooths analog
output of the synthesizer IC.
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