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COM300 Voice Communication Modem
2
2.1.1 Specifications
• Bell 212A, CCITT V.22, and V.32BIS compatible
• Full duplex at 9600 and 1200 baud to datalogger
• V.42 LAPM and MNP2-4 error correction
• Hayes AT command set
• RJ-11C telephone jack
• FCC and IC (formally known as DOC) approval
• Pulse or tone dialing
• Current drain: 100 µA quiescent, 180 mA active
• Direct connection to and powered by CSI dataloggers
• Supply requirements: 12 VDC power supply
• Internally switches 12 VDC external power minimizing current drain
• Logic levels: below 1.5 V inputs a low state and above 3.5 V inputs a high
state. A low voltage level on the TX data input (pin 9) and RX data output
(pin 4) represents a mark
• Operational temperature: -25°C to +50°C
• Size: 5.2” x 1.7” x 3.6” // 13.1 x 4.3 x 9.2 cm
• Weight: 0.75 lbs // 0.34 kg
For theory of operation for the COM300 modem, refer to Appendix B of this
manual.
2.2 Voice Capable Datalogger
The following Campbell Scientific array based dataloggers are capable of voice
communication: the CR10, CR10X, CR500, CR510, and CR23X. The CR10
will require a special UVEPROM to enable voice communication. If this
special prom was not installed at the factory, please contact Campbell Scientific
or your Campbell Scientific representative. Appendix C provides information
on installing this UVEPROM.
2.3 Telephone
Typically a touch-tone phone is used to call the COM300 modem. A rotary
phone can be used if the programmed verbal announcements do not require the
user to navigate through the modem's menu system.
2.4 LoggerTalk Voice Communication Programming Software
Datalogger program files created using Campbell Scientific's Edlog program
editor must be modified to include voice communication announcements. This
modification is accomplished using LoggerTalk software, which is shipped with
all COM300 modems. LoggerTalk requires a computer running Windows
95/NT/98.