QSR in operation at The Bull s Head
![](https://mb.cision.com/Public/1793/9442842/b2ae392e0b41684e_800x800ar.jpg)
Call Systems Technology (CST) is the leading supplier of on-site communications systems. The product range runs from simple pagers systems to intelligent software that runs a site’s full communications and facilities management. CST’s comprehensive range helps businesses run more efficiently and more profitably.