The Model JNT-36XX opto-input module communicates with PCs via Ethernet and Internet networks. The module provides opto-isolated inputs that can be read in an open-systems environment from any number of remote sites. Synchronous or asynchronous client/server communication with the module can be with socket-level TCP, UDP or HTTP protocols. Other features include an embedded HTML control panel, input voltage range from 0V to 30V, and several configurations of inputs up to 256 points per module are available. Single-unit pricing starts at $375 each. J-WORKS, INC., Sylmar, CA. (818) 361-0787.