Campbell Scientific COM320 Voice Communications Modem - Manual (Page 7)

COM320 Voice Communications Modem
1. Introduction
The COM320 is a voice-synthesized modem that supports the CR800, CR850,
CR1000, and CR3000 dataloggers. The COM320 allows the datalogger to
announce over the telephone specific variable data, present state of flags and/or
control ports, and the ability to toggle flags and/or control ports. Along with
announcing information over the phone, the datalogger can also be
programmed to call specific phone numbers with different messages when
specific conditions are met.
Although the primary function of the COM320 is voice communications, the
modem is also capable of data communications. In data mode the COM320
supports standard datalogger functions including program send, data
collection, and data callback.
This manual provides information regarding COM320 specifications,
installation, and operation. Quick Start (Section 3) presents an example
CR1000 voice callback/callin program with descriptions of the code.
Section 6.3 explains how to make a good earth ground connection to maximize
protection of the COM320 against lightning and electro-static discharge.
FIGURE 1. COM320 Voice Synthesizer Modem
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