User's Manual

32 MDS TransNET I&O Guide MDS 05-2708A01, Rev. D
For CTS Key operation (see the DEVICE command), the timer specifies how
long to wait after asserting the CTS line before sending data out the DATA
port. A timer value of zero means that data will be sent out the data port
without imposing a key-up delay. (Other delays may be in effect from other
radio operating parameters.)
CTSHOLD [0–60000]
Clear-to-Send Hold Time
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]
Radio-MODEM Behavior
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]
InSite Diagnostics Link Support
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 even while the radio is in sleep mode. DLINK OFF disables this
feature. The default setting is ON.
The following DLINK baud rates selections are supported:
• 1200 • 4800 • 9600 • 19200 (default)