Campbell Scientific’s COM220 phone modem is smaller, but shares many electrical specifications with its predecessor, the COM210. Several of the COM220’s settings are user-configurable via dip switches for specialized applications. This modem offers both the Modem Enable (ME) and Synchronous Device Communications (SDC) modes. It supports communication rates up to 115.2 kbps between the modem and datalogger. In practice, data transmission through phones lines is generally constrained to 33.6 kbps. Number of rings before answer and other settings are configurable using our Device Configuration Utility (DevConfig) v. 1.6 or later and the SC532A Interface. The COM220 should be available for purchase in September 2006.