1 : IPBX
An IP PBX is a telecommunication device that provides voice connectivity to desk phones within a building. It oversees the outgoing and incoming calls across its telephone network using an internet connection. An IP PBX phone system can make and receive phone calls over the internet while maintaining analog phones throughout the office.
2: VOIP Phones: IP voice and Video Phones
A VoIP phone—some<mes also known as an IP phone or internet-based phone—is any device that uses IP technology to transmit calls.VoIP phones, therefore, can come either in the form of specialized digital hardware (like a deskphone) or a soVware program (running on a computer or mobile device) that performs the same functions. The latter is known as softphone.Whatever its ulti mate nature and appearance, a VoIP telephone takes the sound you generate and converts it into packets of data. It then sends that data over the network and out through the internet. The phone on the other end decompresses the data and plays it back for the other person to hear.
3: ATA & Digital Gateways
Analog gateways handle analog signals, often used in traditional telephony systems such as analog phones, fax machines, and modems, which all generate analog signals.
Digital gateways handle digital signals. Digital signals are in technologies such as VoIP and digital phone systems. Devices like computers, smartphones, and IP phones generate digital signals.
You will know which gateway you need based on the specific requirements of the communication infrastructure and the types of devices that need to be integrated into the network.