U-90E Data/Fax Modem
Modem Installation
2-2
2.1.1 Front Panel LEDs
The following table describes the LED indicators.
Table 2-1 LED Indicators
LEDs
Description
HS
High Speed mode indicator, lights ON when your modem is operating in V.34 or V.90
mode; flashes when your modem is in Handshaking State.
AA
Auto-Answer indicator lights ON when your modem is in the Auto Answer Mode; and
Flashes when modem rings. In error control mode, it flashes when retransmitting.
CD
Carrier Detect indicator, lights ON when a valid carrier is detected present on the line.
OH
Off-Hook indicator lights ON when your modem is in data mode or off-hook and lights
OFF when your modem is in talk mode or on-hook.
DTR
Data Terminal Ready indicator, lights ON when your DTE or computer indicates that it
is ready to begin communication and lights OFF when DTE is not ready to transmit
data.
DSR
DTE mode. Data Set Ready Indicator, lights ON when the modem is ready for
communication and lights OFF when the modem is not ready.
CTS
DTE mode. Clear To Send indicator, lights ON when modem can accept data for
transmission. It indicates the signal status of RS232 signal CTS.
RTS
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.
TXD
Transmit indicator, ON when your DTE/computer transmits data on the serial port.
RXD
Receive indicator, ON when your DTE/computer receives data on the serial port.
SQ
Signal Quality Indicator, ON when signal quality is good, OFF when signal quality is
bad, and flashes when signal quality is marginal or during power up to indicate an
error condition.
TST
Test indicator, ON when modem is in the test mode.
Содержание U-90E
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