We work with small and medium-sized enterprises from 2 to 5000 users. We have a range of business telephone systems and ancillary solutions from Avaya, Gamma, Horizon and more. Based near Manchester in Stockport, Criterion has a proud history of supporting business phone systems throughout the UK via a Group network.

We’re at the forefront of Voice over IP telephone system technologies and have solutions tailored for businesses, towards utilising Voice over Internet Protocol (VoIP systems).