There are several phone lines available for your business. Some of the most common pre-defined numbers of lines are as follows: 2-line phone system - The 2-line phone system is the best solution if you are in a home office or have a small business. It can help you with call volume control during peak hours; 3-line phone system - Vast flexibility and excellent call quality are the most significant advantages of a 3-line VoIP phone system. This more advanced system brings better connectivity to your team and clients; 4-line phone system - The 4-line phone system improves the level of communication for your business. It is suitable for a collaborative team working together in different places. It has several additional features compared to other options.