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4–10
The types of dial-up network modems that you can use are:
Manual: These are typically acoustically coupled modems. The
connection is established when human operators (at both ends) insert the
telephone handsets into couplers to complete the connection.
DTE-controlled answer: These unattended moderns are directly
connected to the phone lines. The module, serving as the data terminal
equipment (DTE), controls the modem through the DTR, DSR, and
DCD signals. The module incorporates timeouts and tests to properly
operate these types of modems. See the section “Using the 1785-KE in
an Auto-Answer Application” below for details.
Auto-answer: These modems have self contained timeouts and tests, and
can answer and hangup the phone automatically.
The module has no means of controlling an auto-dial modem, but it can be
used in conjunction with a separate auto-dialer.