RTS CS9500, Руководство пользователя

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Analog hybrids. These were, on most phone lines,
poor at removing the send signal from the caller's audio.
This meant that the announcer's voice would become
distorted
as
the phone audio was added to the
mix.
(A full discussion of hybrids and interface systems
is
included in
the Telos Telephone
Q
A.)
The Telos One is a second generation telephone
interface. It
uses
state-of-the-art digital techniques to perform
the hybrid function
-
the subtraction of the send from the receive
audio. The input and caller audio signals are converted to digital
.
and operated on in such a way
as
to very effectively remove the
send audio from the output while maintaining natural
simultaneous full-duplex conversation. The digital approach
assures consistently good trans-hybrid loss regardless of varying
phone
line impedance.
Special Features
The Telos One incorporates sophisticated audio processing
in
the
digital
for gain control and filtering.
A
digital high-pass filter is used to reduce hum and other low
frequency interference. High frequency noise above the telephone
frequency range
is
also
attenuated.
FREQUENCY
plus
INTRODUCTION