DVS-1 DIGITAL VOICE SYSTEM
The DVS-1 is a combination of the latest microprocessor-controlled PCM (pulse-
code modulation) digital voice recording and memory circuitry and digital DTMF
decoder, allowing recording either from the microphone or of received signals,
and playback through the loudspeaker or on the air.
A one-megabit RAM (random access memory) on the DVS-1 can be used as a
single block for up to 128 seconds of recording, or divided into four or eight
segments for selective recording and playback. Without the operator being
present, incoming messages can be recorded by stations having access to the
private station ID number and D'I'MF-equipped transceiver, and these messages
can then be read back by the station operator, either locally or by remote access
through DTMF control codes.
The sampling bit rate of the A-D (analog-to-digital) converter is front panel
selectable between 8, 11, 16 and 32 kilobits/second, allowing the operator to
select the optimum trade-off between recording time and fidelity. Different bit
rates may be selected for different segments.
The programmable private station ID number (0001 to 9999) can be activated to
restrict recording and playback, or recording only, of selected messages to only
those stations previously notified of the ID number. The station owner can read
received messages from a remote location using any DTMF-equipped transceiver.
The S-meter serves as an "elapsed time" indicator for recording and playback,
and the microphone DWN and UP scanning keys serve to activate and deactivate
recording and playback.
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