Many of our signaling and call systems are hosted by a  microcontroller. These low cost devices give a versatility and flexibility previously unobtainable with analogue electronics. We maintain a library of software routines which can be simply pasted into a design with usually a few simple code modifications. This simplifies the design process and keeps the cost down. We use a selection of languages to best suit the application, however as most of our control systems utilize a degree of feedback on single or multiply inputs our preferred choice for individual I/O control is assembler. 

This microcontroller technology is used as a part of the process for many other applications and these tend to be more cost effective than PLCs.