The service allows you finding out who has called you, when the telephone line was busy, switched off or was outside the zone of coverage. By doing so, it ensures that an important call will not be missed.
ATCOM AT-530P IP phone allows making calls around the world without the use PSTN. It has two integrated 10/100 Mbps Ethernet ports and allow using this phone with the existing Internet connection. Atcom AT530P supports Static IP, DHCP-client and PPPoE.