Covers all types of connections from: analog, ISDN or IP. For safe transition when changing the connection type is guaranteed. Easy to install and operate, thanks to easily understandable user interface and an extensive manual. After the problems with my previous Gigaset SX353isdn (that was a tragedy!) Works with the new device at last synchronization and the interaction between PBX and PC without friction. Timely delivery and reliable transport packaging at an acceptable price round off the good image of the delivery.