Telex C-2002 - Manual (Page 16)

10
Vega’s C-2002
5 Hardware Overview
The C-2002 is a Two-line, multi-mode console designed specifically for small to medium level system
requirements. All functions are housed in a single small modern looking console.
5.1 C-2002 Console
The C-2002 consists of the following sub-assemblies enclosed in the single case: Main Processing Board, Keypad
PCB and Display.
5.1.1 Main PCB
The Main PCB is mounted to the bottom of the enclosure using 4 #6 screws. It contains the DSP that handles all
audio processing and user interface features. Two stereo Digital to Analog Converter (DAC) is utilized to generate
audio for transmission, handset sidetone, and receive audio. Two stereo Analog to Digital Converter (ADC) on the
main board digitizes audio from the line, microphones and the auxiliary interface. All audio detection, generation,
and filtering are performed within the DSP. Seven potentiometers are available for I/O signal level adjustment, in
addition to the software level control.
5.1.1.1 Line Interface
The Line Interface is an 8 pin RJ-45 connector, using either the standard tone control format compatible with
Motorola and M/A ComNet Ericsson/GE or Local Control relay closure. The line interface may be hardware
configured for either two-wire or four-wire operation and may be factory modified to accommodate non-industry
standard tone control formats if desired. This is usually a software only change.
5.1.2 Keypad PCB
The Keypad board is interfaced to the main board via a 40-pin ribbon cable. The Keypad board contains the LED’s,
the entire key map matrix and the panel microphone. The driver circuitry for each component is located on the Main
PCB.
5.1.3 Display
A Vacuum Florescent LCD display provides channel/numeric indication, clock and audio-level meter. The display
is mounted to the front panel and is connected via a 14-pin IDC cable assembly.