COM220 Phone Modem
The COM220 phone modem enables communications between a computer and a Campbell Scientific data logger over a public switched telephone network. A Hayes-compatible modem is required at the computer site. The COM220 connects to the data logger at the field site. Most Campbell Scientific data loggers are compatible.
The COM220 has a CS I/O port, power terminals, screw terminals, and an RJ-11C jack. The data logger connects with the CS I/O port via an SC12 or SC12R-6 cable. The RJ-11C jack is for attaching a surge-protected telephone line. Alternatively, the screw terminals (GND, RING, TIP) can be used to connect the COM220 with a phone line via a surge protector.
| Transmission Distance or Area | Worldwide |
| Operation | 1200 to 115200 baud digital communications over phone lines |
| Operating Voltage | 12 Vdc |
| Current Drain |
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| Communication Rate | 9600, 38400, 57600, 115200 bps (between data logger and COM220, and selected by user) |
| Operating Temperature Range | -25° to +50°C (standard) |
| Standards | V.92, K56Flex, V.90, V.34, V.32bis, V32, V23, V22bis, V22, V.21, B212, B103 |
| Registration |
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| Service Requirements | If not available at the site, phone lines must be installed. |
