USER’S MANUAL
Section 3: GUIDED TOUR of the HARDWARE 53
Parallel
Inputs
0
‐
7
All
inputs
are
specially
treated
to
accept
either
a
voltage
(up
to
24
VDC),
or
a
closure
to
ground,
which
may
be
provided
by
switches,
relays,
or
logic
outputs.
The
inputs
are
active
low.
In
other
words,
shorting
the
input
to
ground
causes
it
to
become
true
(i.e.
"asserted").
A
built
in
1k
Ω
pull
up
resistor
is
provided
so
TTL
outputs
can
be
directly
interfaced.
See
below
for
a
simplified
schematic
of
the
input
circuitry.
+5 VDC
(30 Volts max)
INPUT
PIN 25
Parallel logic input circuit
t
DEEP TECH NOTE!
The Zephyr Xstream’s “universal” logic input circuit can be used with switch or relay
closures, voltage levels up to 24 Vdc, or logic outputs – either “totem-pole” or open-
collector.
The
inputs
can
be
transmitted
to
the
far
end
Zephyr
Xstream
when
using
the
Layer
‐
3
or
AAC
coding
mode.
The
inputs
can
also
be
used
for
local
control
functionality
such
as
triggering
Dial
Setups
(Panic
Dial).
Refer
to
Section
11.5
(Detailed
Menu
Reference)
for
the
menu
selections
relating
to
these
functions.
Summary of Contents for Zephyr Xstream
Page 2: ......
Page 26: ...USER S MANUAL Section 1 QUICK RESULTS 14...
Page 30: ...USER S MANUAL Section 2 INTRODUCTION Getting to Know the Zephyr Xstream 18...
Page 70: ...USER S MANUAL Section 3 GUIDED TOUR of the HARDWARE 58...
Page 144: ...USER S MANUAL Section 6 AUDIO CODING REFERENCE 132...
Page 164: ...USER S MANUAL Section 8 LIVEWIRETM IP Audio 152...
Page 310: ...USER S MANUAL Appendix 1 Codec Interoperability Information 298...
Page 320: ...USER S MANUAL Appendix 3 ISDN Cause Phrases Values 308...
Page 324: ...USER S MANUAL Appendix 4 Known Working SPID Formats by Telco 312...
Page 356: ...USER S MANUAL Appendix 9 Modular Cable Guide 344...
