Telephone communication links require a Campbell Scientific field modem at the data logger site and a Hayes-compatible modem at the calling end. Remote RF or multidrop networks are accessible by telephone.

Several types of telephones are available, including CDMA cellular digital modems as well as rugged landline modems for field use. Voice modems allow you to access your data via voice or to retrieve data to your computer.

Many of the telecommunications links can be combined. Typical examples include Phone-to-RF and Phone-to-multdrop. If you have questions whether a particular combination will work, contact one of our Applications Engineers.

If your application requires a data logger to initiate a call, the CR10(X), 21X, CR23X, and CR7 data loggers can be programmed to initiate a call to the PC when alarm conditions are met. Alarm conditions can be time, temperature, flow, stage, or any measurement being taken by the data logger. Call-back is possible via direct connections, radio links, telephone links, or some combinations of these telecommunications paths.

Because telephone device regulations may vary by country, check with your local international sales representative for information on compatibility.