Voice via your existing data network
IP telephony is a standards based service using Internet Protocol to carry voice communications over a data network.
The benefit of using IP Telephony over traditional services such as the Public Switched Telephony Network (PSTN) is that it provides a consistent service across a consistent physical infrastructure. This means that everyone gets the same facilities whether they are in your headquarters, branch office, at home or on a mobile.
Using Session Initiation Protocol (SIP) based products which are standards based enables your employees to talk with each other using almost any device.
IP telephony is highly scaleable meaning you don't have to throw out your old equipment each time you grow. You can start with a single line and grow from there. It's easy to provide links between buildings using fibre instead of multiple pair (expensive) cables using your existing data infrastructure.