Siemens 300 Series User Manual page 21

Data Communications Option
Once the Data Communications Option (DCO) is
installed, your ROLMphone 600 series telephone can
be attached to a terminal or a personal computer with
an RS-232C cable. Before the option is installed or
removed from your telephone, the telephone must be
configured accordingly at the CBX. Only one DCO
may be installed in a given telephone.
The DCO module contains a set of commands that
may be used by a software program in your personal
computer to control the telephone from your
computer keyboard or to provide asynchronous data
communications. For more information concerning
the DCO module, see the ROLMphone 600 Series
with DCO User Guide for Release 9006i, 9751 CBX
(GU30-1551).
Introduction 1–7