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Chapter
1
Description
MSF
5000
Instruction Manual
TTRC
Functional Description
DC Remote Control
1-24
DC
remote control is
a
software-enabled option that allows control of
an
MSF
5000
station from
a
remote location
using
a
DC
continuous wireline pair.
This
option may
be used in
place of
the
standard
TRC.
The major difference is
that
the
TRC
decoder is disabled and the
DC
current decoder is enabled. The
DC
remote control option is not compatible
with any trunking
or secure
equipped
stations.
The transmit wireline
can
be
configured
as
a
2-wire
or
4-wire system. The wireline
inputs for
DC
remote control
are
configured through jumper settings
on the
TTRC
Audio
board. Refer to
Appendix G
-
Jumper
Settings.
Station control is accomplished
via
the remote
device sending
a
continuous Direct
Current
(DC),
known
as the
function signal. The function signal level
is
interpreted
by
the
TTRC
Logic
board. In response
to the
function current,
the
TTRC
board then initiates
the
station function
via
the
MUXbus,
Inter-Processor
Communications Bus (IPCB), and
High
Speed
Ring (HSR).
Six different direct
currents
provide six different
uses. Table 1-6
provides
a
list of
these currents and
their
uses.
Table 1-6
Standard
DC
Control Currents and Defaults
Direct Current
ON/OFF
Default
Description
(mA)
-12.5
Detect
CHIN
4;
KEYON
Select channel
4,
key
the station
until
the
KEY
OFF
command is issued.
12.5
Undetect
KEYOFF
Dekey
the
station that was keyed
via
the
KEY
ON
command.
-5.5
Detect
CHN
3;
KEYON
Select channel
3,
key
the
station until the
KEY
OFF
command is issued.
5.5
Undetect
KEYOFF
Dekey
the
station that was keyed via
the
KEY
ON
command.
-2.5
Detect
-2.5
Undetect
$2.5
Detect
42.5
Undetect
$5.5
Detect
CHN
1;
KEYON
Select channel
1,
key
the
station
until
the
KEY
OFF
command
is
issued.
5.5
Undetect
KEYOFF
Dekey
the station that
was keyed via
the
KEY
ON
command.
+12.5
Detect
CHN
2;
KEYON
Select channel
2,
key
the station
until
the
KEY
OFF
command
is
issued.
+125
Undetect
KEYOFF
Dekey
the
station that
was keyed via
the
KEY
ON
command.
68P81092E02
3/19/94
Chapter
1
Description
MSF
5000
Instruction Manual
TTRC
Functional Description
DC Remote Control
1-24
DC
remote control is
a
software-enabled option that allows control of
an
MSF
5000
station from
a
remote location
using
a
DC
continuous wireline pair.
This
option may
be used in
place of
the
standard
TRC.
The major difference is
that
the
TRC
decoder is disabled and the
DC
current decoder is enabled. The
DC
remote control option is not compatible
with any trunking
or secure
equipped
stations.
The transmit wireline
can
be
configured
as
a
2-wire
or
4-wire system. The wireline
inputs for
DC
remote control
are
configured through jumper settings
on the
TTRC
Audio
board. Refer to
Appendix G
-
Jumper
Settings.
Station control is accomplished
via
the remote
device sending
a
continuous Direct
Current
(DC),
known
as the
function signal. The function signal level
is
interpreted
by
the
TTRC
Logic
board. In response
to the
function current,
the
TTRC
board then initiates
the
station function
via
the
MUXbus,
Inter-Processor
Communications Bus (IPCB), and
High
Speed
Ring (HSR).
Six different direct
currents
provide six different
uses. Table 1-6
provides
a
list of
these currents and
their
uses.
Table 1-6
Standard
DC
Control Currents and Defaults
Direct Current
ON/OFF
Default
Description
(mA)
-12.5
Detect
CHIN
4;
KEYON
Select channel
4,
key
the station
until
the
KEY
OFF
command is issued.
12.5
Undetect
KEYOFF
Dekey
the
station that was keyed
via
the
KEY
ON
command.
-5.5
Detect
CHN
3;
KEYON
Select channel
3,
key
the
station until the
KEY
OFF
command is issued.
5.5
Undetect
KEYOFF
Dekey
the
station that was keyed via
the
KEY
ON
command.
-2.5
Detect
-2.5
Undetect
$2.5
Detect
42.5
Undetect
$5.5
Detect
CHN
1;
KEYON
Select channel
1,
key
the
station
until
the
KEY
OFF
command
is
issued.
5.5
Undetect
KEYOFF
Dekey
the station that
was keyed via
the
KEY
ON
command.
+12.5
Detect
CHN
2;
KEYON
Select channel
2,
key
the station
until
the
KEY
OFF
command
is
issued.
+125
Undetect
KEYOFF
Dekey
the
station that
was keyed via
the
KEY
ON
command.
68P81092E02
3/19/94
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