30
MDS TransNET 900 I&O Guide
MDS 05-2708A01, Rev. B
CTSHOLD [0–60000]
Used in
DEVICE CTS KEY
mode, this command sets the amount of time in
milliseconds that CTS remains present following transmission of the last
character out the RXD pin of the
DATA
port. This “hold time” can be used to
prevent squelch tail data corruption when communicating with other radios.
The
CTSHOLD
setting can range from 0 to 60000 (i.e., 60 seconds). The
default value is 0, which means that CTS will drop immediately after the last
character is transmitted. If the command is entered when the radio is in
DEVICE DCE
mode, the response
CTSHOLD N/A
will be displayed.
DEVICE [DCE, CTS KEY]
The
DEVICE
command sets or displays the device behavior of the radio. The
command parameter is either
DCE
or
CTS KEY
.
The default selection is
DCE
. In this mode, CTS will go high following RTS,
subject to the CTS programmable delay time. Keying is stimulated by the
input of characters at the data port. Hardware flow control is implemented by
dropping the CTS line if data arrives faster than it can be transmitted.
If
CTS KEY
is selected, the radio is assumed to be controlling another radio,
such as in a repeater or tail-end link system. The RTS line is ignored and the
CTS line is used as a keyline control for the other radio. CTS is asserted
immediately after the receipt of RF data, but data will not be sent out the
DATA
port until after the CTS programmable delay time has expired. (This gives the
other radio time to key.)
Following transmission of the last byte of data, CTS will remain asserted for
the duration specified by the
CTSHOLD
command.
CTSHOLD
should be set
sufficiently high.
DLINK [xxxxx/ON/OFF]
DLINK
ON
enables use of Diagnostic Link mode and establishes it as the
default protocol on the RJ-11
DIAG
port. Diagnostic Link mode is a special
protocol used to support Network-Wide Diagnostics.
DLINK
must be set to
ON
to support connection to InSite or to support chained diagnostics between
radio networks.
DLINK OFF
disables this feature. The default setting is
ON
.
The following
DLINK
baud rates selections are allowed:
• 1200
• 4800
• 9600
• 19200 (default)
• 38400
• 57600
• 115200
Example:
DLINK 4800
sets the RJ-11
DIAG
port to operate at 4800 bps when
diagnostics is “closed”. This setting will not affect the port’s autobaud
operation. Use only of
DLINK ON,
will enable the use 19200 or the most
recently programmed value. The default is
DLINK 19200
and
DLINK ON
.
NOTE:
The same baud rate must be entered into the InSite Equipment List’s
BAUD
field.
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