TSL AIB-4 - Intelligent GPIO Control Interface with DTMF and ModemTSL's IP AIB4 is a compact and intelligent control solution. The AIB4 supports all of the functionality of the AIB range with the addition of DTMF and a dial up modem. The AIB is the perfect solution for control and monitoring where ethernet is not available. Easy setup using a standard web browser, assign functions, enter text, and select button colours. All devices in the AIB range are managed via a web browser and provide freely configurable logic