1200 BPS DCM-212 Modem (260-1385A)    Features         Faxback Doc. # 5956

The DCM-212 1200-bps Intelligent Modem has all the features needed to
enhance your data communications applications--including a data output rate
four times that of a 300 bps modem.

This direct-connect, Bell 103/212A-type modem is designed with standard
automatic dial, answer, and disconnect features and also has a wide range
of system configuration enhancements. Its central processing unit (CPU)
provides operation in both Tandy and Hayes protocol modes, and you can
change modes with the flip of a DIP switch. In the Hayes protocol mode, your
modem is AT-compatible and capable of running with Hayes software.

After dialing a phone number, the DCM-212 monitors the call and reports its
progress to your computer over the serial RS-232C link. You can even control
the dialing method--pulse or touch-tone--and the number of times the phone
rings before the modem answers.

These functions and others are controlled by ASCII (American Standard Code
for Information Interchange) encoded commands that you program from your
computer keyboard over the serial RS-232C interface.

The basic operation of your modem is, in some ways, like that of a telephone
operator making a call:

* Waits as the phone rings until the dialed number is answered

* Hangs up and redial later if the number is busy or if the call is not
  answered after a specified period of time.

* Disconnects the line at the end of a completed call

One of the DCM-212's more advanced features is the ability to determine your
computer's communications parameters (bit rate, data bits per word, parity,
and stop bits per word), and then, by using a simple command code sequence,
adjust its own operation to meet system requirements.

Incorporating a high degree of intelligence, the DCM-212 allows your computer
to function virtually unattended when linked to a telephone, making possible
a wide range of telecommunications applications. Used with the proper
applications software package, the modem is capable of performing operations
such as electronic mail and shopping, central database access, home banking,
and remote-peripheral sharing.

Another feature of the DCM-212 is a built-in monitor speaker that enables
you to audibly monitor the dialing and data communication progress. The
situation is reported visually on your computer display with messages called
result codes.

Sample programming sessions are provided in each section of this manual to
help familiarize you with the various functions of the DCM-212 and to get
you started using your modem as quickly as possible. After you are familiar
with the manual and your modem, the handy Quick Reference Card should keep
you "up and running."

(dkh-08/04/93)