USER’S MANUAL
Section 3: GUIDED TOUR of the HARDWARE 20
Headphone Jack & Volume Control
The
front
panel
has
a
headphone
jack
near
the
left
side.
The
adjacent
knob
controls
the
level.
This
jack
duplicates
the
receive
signal
on
the
main
outputs
on
the
rear
panel.
\
Meters and indicators
The
following
LEDs
allow
you
to
monitor
the
system
status
and
audio
levels:
Sync LED
The
green
Sync
LED
indicates,
“all
is
well”
with
the
system.
It
indicates
that
certain
clock
signals
are
present
and
that
the
internal
PLL
is
within
its
normal
range.
This
LED
should
normally
be
illuminated
at
all
times
if
the
internal
ISDN
interface
is
functioning
and
selected
as
your
Interface
in
the
TEL
Menu.
When
the
V.35/X.21
interface
is
present
(and
selected)
the
Sync
LED
will
be
illuminated
only
if
a
valid
external
clock
signal
at
the
correct
frequency
for
the
Bit
Rate
setting
(in
the
CODEC
menu)
is
present
on
one
of
the
two
V.35/X.21
ports.
When
the
Ethernet
interface
is
selected,
the
Sync
LED
will
blink
while
the
Xstream’s
clock
works
to
sync
with
the
Xstream
on
the
other
side
of
the
connection.
Due
to
network
conditions,
it
is
common
for
this
light
to
be
solidly
on
,
then
start
blinking
again
as
the
clock
readjusts.
Lock 1 & 2 LEDs
The
green
Lock
1
and
Lock
2
LEDs
represent
the
codec
decoder
status.
These
will
illuminate
when
a
valid
bitstream
is
received
as
follows:
If
a
dual
channel
receive
mode
is
used
(i.e.
L3
Dual/Mono,
or
G.722)
the
Lock
1
LED
represents
that
the
decoder
is
locked
(or
“framed”)
to
the
incoming
coded
audio
on
“Line
1”
while
the
Lock
2
LED
represents
a
decoder
lock
on
an
incoming
audio
stream
on
“Line
2”.
In
the
case
of
a
stereo,
or
mono
‐
128,
receive
mode,
both
lock
LEDs
will
illuminate
only
once
a
compatible
pair
of
bit
‐
streams
are
present
on
both
“Lines”.
Send Bargraph
The
Send
Bargraph
LEDs
represent
the
level
of
audio
into
the
coder
section.
This
level
is
effected
by
several
factors:
the
output
level
of
the
device
connected
to
the
Zephyr
Xstream;
the
settings
of
the
input
level
jumpers
(see
Section
5);
the
setting
of
the
Level
In
option
in
the
AUDIO
menu;
and
the
setting
of
the
Gain
trim
(may
be
called
In
Gain
on
early
software
versions)
setting
in
the
AUDIO
menu.
As
with
most
digital
equipment,
these
meters
are
calibrated
in
dBfs
(decibel
below
full
scale).
In
other
words,
the
top
LED
represents
the
clip
point
and
the
numbers
are
calibrated
in
dB
below
f
ull
s
cale.
Therefore
it
is
essential
that
your
levels
be
set
to
where
the
top
LED
is
never
lit.
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...
