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MODEM 325 AND MODEM 325 CARD
5.1 General
This chapter contains a functional description of the modem.
5.2 Controls and Indicators
The front panel houses the LCD panel and LED indicators. The power switch is located on the rear
panel.
5.3 LED Descriptions
The LEDs display modem status during various operations.
5.3.1 R
S
EQUEST TO
END
RS—lights when the data terminal is ready to send data to the modem. This signal is input on EIA-232
pin 4.
5.3.2 C
S
LEAR TO
END
CS—lights when the modem is ready to accept data from the terminal. This signal is output on EIA-232
pin 5.
5.3.3 Q
M
UALITY
ONITOR
QM—lights when poor signal quality produces a bit error rate of 1 x 104 or greater. This signal is output
on EIA-232 pin 11.
5.3.4 C
D
ARRIER
ETECT
CD—lights when the received audio carrier signal is detected or, if enabled, when V.42 negotiation is
complete. This signal is output on EIA-232 pin 8.
5.3.5 R
D
ECEIVED
ATA
RD—lights for a space at the receive data output, indicating receive output data activity. This signal is
output on EIA-232 pin 3.
5.3.6 T
D
RANSMIT
ATA
TD—lights for a space at the transmit data input, indicating transmit input data activity. This signal is
input on EIA-232 pin 2.
5.4 Getting on Line Quickly
Turn the power switch on the rear panel ON.
This procedure can help with first time operation of the modem. The procedure assumes that phone
numbers have been inserted in memory, that an asynchronous dial-up option set is in effect, that power,
DTE, and telephone line connections are made, and that a similar, remote station is available for
communication.
4 2
5. Operation
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