EF-Series Instruction Manual
Rev 2/01 3-7
The modem card interfaces to two-wire, full-duplex telephone lines using asynchronous operation at
data baud rates of 1200 and 2400. The card interfaces to a PSTN through an RJ11 jack located at the
bottom of the communications card. The modem can be controlled using industry-standard AT
command software. A 40-character command line is provided for the AT command set, which is
compatible with EIA document TR302.2/88-08006.
LED indicators on the card show the status of the RXD, TXD, AA, and OH control lines. Refer to
Table 3-1. The modem card also provides RS-232 level output signals (RXD and TXD) for an
analyzer.
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