The cost of landline phone services varies from one service provider to another. For instance, leading companies like Verizon have home landline plans starting at $25 per month.However, setting up traditional landline business phone systems will cost you more than home plans. Not only will you need multiple lines or a PBX system, but you will also need to invest in the hardware and infrastructure. The cost will vary based on the size of your company, the number of users, features and functionalities, etc.However, if you choose a VoIP business phone system for your business needs, the costs are lower than traditional landline connections. Service providers like Ringover have basic plans starting at a monthly fee of £17 per user and advanced calling plans at £29 per user.Moreover, you can also use your current analog devices on VoIP systems with the help of Analog Telephone Adapters (ATA).