1.1
OVERVIEW
The Telos ONE plus
ONE
Dual Interface
The Telos
ONE
plus
ONE
consists of
two
Telos One digital hybrids
in
one
19 rack mount
enclosure.
The Telos One interface embodies a state of the art approach to
interfacing telephone
lines
for broadcast on-air, intercom interface,
or
teleconferencing use. The very fast and precise digital
automatic nulling hybrid allows smooth, natural, simultaneous
conversation without the
usual
speakerphone
effect or
the audio distortion
and
feedback problems often experienced with
poorer hybrid-type interface devices.
As
well, a number of
functions are accomplished in the
digital domain
in
order to enhance "real-world'' performance.
Included are sophisticated automatic gain control
in
both the send
and receive paths, a carefully-implemented override ducking
system, and a pitch shifter for feedback reduction.
Telephone connections
are
via standard modular jacks, while audio
input and output are connected via
XLRs.
Each hybrid
has
one
balanced input with provision for mic or line levels and
two
balanced outputs. The second output may be switched to
be
either a
second isolated output or a
of the send and
signals.
Purpose
The purpose of the Telos One broadcast telephone hybrid
is
to
deliver
to
the receive output pure caller audio
with
as
little
of
the
send (announcer) audio
as
possible mixed-in. Until digital
signal
processing techniques were applied to the telephone interface
problem, there were
two
choices:
Switching.
The send and receive paths were separated by
having only one talk direction active at a time. The
common "speakerphones" use this approach.
The
disadvantage
is
that
conversation is impossible,
since the caller
is
when the announcer talks
-
and
vice-versa.
ONE plus
ONE
-
Summary of Contents for CS9500
Page 16: ...Telos ONE plus ONE Dual Digital Telephone Interface User s Manual 1 1 I...
Page 21: ...SECTION 1 INTRODUCTION...
Page 27: ...INSTALLATION SECTION 2...
Page 28: ...8 T IOS ONEPIUS ONE INSTALLATION...
Page 35: ...OPERATION SECTION 3...
Page 53: ...DRAWINGS SECTION 5 Te ONEplusONE DRAWINGS 35...
Page 56: ...F Telos ONE PLUS ONE TMS320C25 Pinouts...
Page 57: ......
Page 59: ...J1 4 1 I 0 2 e J6 0 5 P1 IN LVL Telos ONE PLUSONE input output audio...
Page 60: ...e J3 e HDRl 5v f DATA LINES 0 7 Tela ONE PLUSONE phone control...
Page 61: ...APPENDIX SECTION 6...
Page 70: ...wl 1 lo I1 I d f r r 1 J...
Page 71: ...Accessory PCB Module BASIC AUTO ANSWER BOARD TeksONEplus ONE BASICAUTO ANSWER BOARD...
Page 74: ...Telos basic AutoAns Rev 3 1...
Page 75: ...Accessory PCB Module SUPER AUTO ANSWER BOARD TelosONEplusONE SUPER AUTO ANSWER BOARD...
Page 89: ...c...
Page 90: ......
Page 91: ......
Page 92: ...t Tutorial ELECTRONIC PHONE SYSTEMS TebsONEplus ONE ELECTRONICPHONETUTORIAL...
