Obtaining Status and Statistical Information
Page 29-46
Control Signal
This table (which displays only for serial ports, not T1 or E1 ports) lists two or more
control signals along with their current state. If a V.35, RS-232, RS-530, or RS-449 cable is
attached then this table lists the following signals:
•DTR (Data Terminal Ready.)
•RTS (Request To Send.)
•DSR (Data Set Ready.)
•CTS (Clear To Send.)
•DCD (Data Carrier Detect.)
The ON/OFF indicator below the signal name tells you the current status of the signal.
Under normal operating conditions (physical connection is good and VC is administra-
tively enabled), all signals should be On.
Whether the signal is an input or an output depends on whether the WSX is a physical
DTE or DCE. The following table shows the Input/Output status of each signal type.
If using an X.21 cable, then the table shown in the sample display is replaced by the
following table:
Control C(Control) I(Indicator)
Signal ON ON
This X.21 table shows 2 rather than 5 signal statuses. The C signal is similar to the RTS
(Request To Send) signal. The I signal is similar to the DCD (Data Carrier Detect) signal.
Under normal operating conditions, both the C and I signals should be On.
Whether the signal is an input or an output depends on whether the WSX is a physical
DTE or DCE. The following table shows the Input/Output status of each signal type.
Signal Direction When Port Is...
Signal DCE DTE
DTR In Out
RTS In Out
DSR Out In
CTS Out In
DCD Out In
Signal Direction When Port Is...
Signal DCE DTE
C In Out
I Out In