Unlike many competitors' phone systems, Allworx phone systems gives you the luxury of choice in telephone technology. Our systems support both analog and VoIP phones — in any combination. That means you can adapt new technology all at once, or build up gradually. Either way, you're implementing the solution at your own pace, without compromising. Allworx offers multiple ways to connect your system to the PSTN, including analog CO trunks, T1 trunks, and even SIP trunks. Allworx phone systems can be configured through an easy to use GUI.