Microsoft has announced a tie-up with telecoms giant Nortel to develop its software for integrating voice, e-mail and video services for businesses.
The move is designed to capitalise on a trend in some large firms to make all communications web-based.
By doing so, they hope to cut down on phone bills and give their staff easier access to all forms of communications.
Microsoft is making voice over internet (Voip) a priority as it competes with firms such as Cisco and IBM.
