The X4/X4G is a feature-rich sip phone for business. The 4-Line IP Phone has been designed by pursuing ease of use in even the tiniest details. Dual 10/100 Mbps(X4G: 10/100/1000 Mbps) network ports with integrated PoE are ideal for extended network use. Delivering superb sound quality as well as a rich visual experience. With a second DSS color screen, the IP Phone supports up to 30 DSS keys which improve work efficiency. Using standard encryption protocols to perform highly secure remote provisioning and software upgrades.