Front Panel Status Lights - AT&T DataPort PCX Modem User Manual

Front Panel Status Lights

Table A-1 describes each front panel LED on DataPort PCX
external modems.
Table A-1. LED Descriptions (1 of 2)
LED
Description
Label
TST Test Mode. When ON, the modem is executing a test.
CD Carrier Detect. When ON, the modem has established a
connection with a modem at the other end of the telephone
line. This LED follows the status of the CD signal, Pin 8 of the
EIA RS-232 interface. (This description assumes that the
&C command is configured for standard EIA RS-232
operation (&C1). Refer to the &C command in Appendix B for
more information.)
OH Off-Hook. When ON, the modem is connected to the
telephone line and a data or fax call is in progress.
RD Receive Data. When ON, the modem is sending data to your
computer. This LED follows the status of the RXD signal,
Pin 3 of the EIA RS-232 interface.
SD Send Data. When ON the computer is sending data to the
modem. This LED follows the status of the TXD signal, Pin 2
of the EIA RS-232 interface.
A
Issue 2 July 1995
A-1