Front Panel Leds - ZyXEL Communications U-336S User Manual

Figure 2-2 U-336SA Front Panel

Front Panel LEDs

PWR Power ON indicator, loghts up when your modem is turned
OH
AA
DTR Data Terminal Ready indicator, lights up when your DTE or
DSR DTE mode: Data Set Ready Indicator, lights up when the
TXD Transmit indicator, ON when your DTE/computer transmits
RXD Receive indicator, ON when your DTE/computer receives data
CD
RTS
8 Installation
ON.
Off-Hook indicator, lights up when your modem is in data
mode or off-hook. It goes out when your modem is in talk
mode or on-hook.
Auto-Answer indicator, lights up when your modem is in the
Auto Answer Mode; flashes when modem rings. In error
control mode, it flashes when retransmitting.
computer indicates that it is ready to begin communication.
modem is ready for communication.
data on the serial port.
on the serial port.
Carrier Detect indicator; lights up when a valid carrier is
detected present on the line.
DTE mode: Request To Send indicator; indicates the signal
status of RS232 signal RTS from DTE. RTS is used for
hardware flow control in asynchronous data transmission.