All types of telephone exchanges have its specifics. The IP PBX is an integrate telephone technology that sends voice calls over IP data networks. All conversations are sent as data packages over the network, while the SIP DECT cells continuously sends a signal that can be received by a handset in the vicinity and the VoIP gateways converts telephony traffic into packets of data for transmission over the internet. All of them have its benefits. Whether you choose IP, SIP DECT or VOIP gateway you will not be dissatisfied.