Microtronix Access User Guide
If connecting to a DCE device (like a modem) that provides the clock signal, an external clock
source is chosen. For independent transmit and receive clocks, choose
External
. For a single
clock signal source, choose
RxFromTx
. When using a tail circuit cable, choose
TxFromRx
.
If the interface is to provide clocking signal to a DTE device, then select an internal source and
specify a Clock Rate appropriate for the interface. Choose
Internal
for independent receive and
transmit clocks, or
DTE
to derive the clock from the DTE’s external transmit clock.
Clock Rate:
Specifies the clock rate used for the internal clock source (Internal, TxFromRx,
TxInt). Do not set the speed higher than the attached device’s capability. RS232 is limited to
128Kb/s with a short, reliable cable. Otherwise RS232 is limited to 64Kb/s. Other interface
types allow speeds up to 10 Mbps.
DTR Detection:
If the attached device does not support a DTR signal, then disable the
detection (assumed readiness). Otherwise, enable it for detection of the device’s readiness to
communicate.
Status:
Set to enabled for HDLC/X.25 operation. To prevent the port from communicating
using HDLC/X.25, set the status to disabled. HDLC must be disabled before the port can be
available for terminal or synchronous server configuration.
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