Things to Consider When Choosing a Multi-Line Business Phone System Installing a reliable multi-line business phone system means customers can reach your company directly, which is key to establishing a good relationship with them. These phones make office communication easier and lead to an increase in productivity. In fact, a recent survey revealed that 95% of respondents believe customer service is essential to their choice of brand and their ongoing loyalty. Being able to respond quickly to incoming calls is an essential part of customer service. Curious if a multi-line business phone could help you do just that?