Dorset-based practice Humphries Kirk recently overhauled its communications system after discovering a supplier based close to its main office.
The five-office, nine-partner firm hired Wareham designer and installer Ensign Communications to replace its outdated hardware and software.
It has increased the speed of the firm's hardware, added PCs with Windows 95 and email, and linked the offices using BT's Kilostream constant connection service.
However, it would not disclose how much it had invested in the new system.
