Mitel is an established telecoms manufacturer who began trading in 1973 selling telephone tone recievers, as the company and market evolved Mitel concentrated their resources into providing PBX systems (Private Branch Exchange - a telephone exchange that serves an office or business) to end users.
Following a change of ownership in 2001 the company has diversified once more to focus almost entirely on VoIP products.
Below is a list of Mitel's interests.
Mitel Product Categories 
Mitel 3300 IP Communications Platform
Mitel SX-2000 Communications Platform
Sabre Telecommunications, 1 Woodingdean Business Park, Sea View, Way, Brighton, BN2 6NX. 

