Telephone Modem with Voice Synthesizer
Model COM300
Campbell Scientific's COM300 voice-synthesizer modem provides a CR510, CR10(X), CR23X, or CR5000
datalogger with speech capability, thus enabling the user to call the site for a spoken summary of real-time or
historical data. The COM300 can also act as a standard modem, with data transmit rates up to 9,600 bps.
Features:
• Allows anyone to call a COM300-equipped site from any phone (including cellular) to receive a verbal report
of current site conditions.
• Enables the datalogger to call you and recite a verbal warning if specified conditions occur.
• Reports specific conditions or allows selection of information by pressing numbers on a touch-tone phone.
• Contains a large number of words on the COM300 chip for constructing the verbal reports; customized words
and phrases are also available.*
• Operates over a wide temperature range: -25° to +50°C standard, -55° to +80°C, optional.
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unacceptable interference to radio and TV reception requiring the operator to take
whatever steps are necessary to correct the interference.
A COM300’s connections: The 9-pin serial port connects the COM300 to a datalogger via an SC12(R) cable.
The RJ11C Modular Telephone Jack connects the COM300 to a surge-protected telephone line, or alternative-
ly, the screw terminals (GND, RING, TIP) connect the COM300 to a phone line via a surge protector. Surge
protectors are strongly recommended for sites where the phone company has not provided surge protection.
You can use any phone to call a
COM300-equipped site and receive a
verbal report of real-time conditions
*See page 3.
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