VoIP
VoIP uses internal network technology instead of traditional cellular networks to make calls, in other words, it's a telephone service on the network.
VoIP (Voice over Internet Protocol) is a great technology that allows you to make free and cheap calls locally and worldwide and gives you a handful of other benefits and improvements over traditional telephony. To be able to use VoIP, you need a VoIP service.
VoIP service is the service that you get from a company (called a VoIP service provider) that allows making and receiving VoIP calls. It is like the Internet service you get from an Internet service provider or the phone service you get from a PSTN line telecom.

queue:
Possibility to create waiting queue
Your phone will never be occupied.

imac:
Conference and voice and video calls
Hold an audio or video conference.

agenda:
Creating internal numbers, unlimited
Create an unlimited number of internal numbers..

headphons:
High Definition Full HD Talk
Your conversations are Full HD.

fax:
Ability to manage, receive and send faxes
No need for equipment, have a fax.

line-chart:
Provide conversations report for users
Have your employees’ conversations.

monitor-tablet-and-smartohone:
Ability to answer on tablet and mobile phone
Answer the calls outside the office.

microphone:
Capable of recording incoming and outgoing calls
Record conversations to cite.