Brightwell Aerials, of Hemel Hempstead, employs four engineers and has two of its four vans connected to the company's pay-as-you-go plan.

Director Bill Flitney says he's particularly impressed with the Google mapping feature.  He said: 'We install and repair aerials on blocks of flats in Herts, Beds, Bucks and London. The Google mapping on the Quartix system not only identifies the whereabouts of each vehicle but can also give assistance to our engineers attending the flats. I can see the work required on a particular building and assist the engineers form  satellite dish locations by simply zooming down via the internet.'

He added: 'The advantages of this are enormous and can also be beneficial for locating access etc. On any building I can actually see possible dish positions and the actual size of the blocks we are working at, and this is crucial to assessing the size and possible difficulty involved in ensuring safe access.

'The mapping system can also be used to assist our engineers locate farms, factories and remote buildings easily. Quartix tracking certainly pays for itself time after time through this one benefit alone.'

The system is also aiding customer relations, says Flitney. 'Customers are always asking "where is the engineer" or "what time can we expect them" and at last I can immediately give them an accurate time of arrival.

'This is a brilliant customer care advantage: I would highly recommend the Quartix system, especially linked to the Google option.'