IP-telephony is the general name for telephone communication, which is carried out due to data transmission over the IP protocol, i.e. through the Internet.
SIP is one of the protocols that ensures the operation of IP telephony: devices find each other by IP address and start a communication session using the SIP protocol.
These technologies allow you to move away from being tied to a location and open up wide opportunities for analytics and call tracking. To provide the service, a line is allocated on the company's side and its settings are made. For routing and storage of calls, the company's facilities, data center disk space or customer equipment are used.
SIP number is a convenient way to demonstrate your company's presence in the city. You can choose one number (if you work locally), or several numbers tied to different cities. Due to multi-channel, several customers can call your number at the same time. What's more, multiple employees can also call different customers at the same time through the same number.