With a comprehensive portfolio of industry-leading IP phone endpoint solutions, Cisco has IP phones for organizations of all sizes, from startups to the largest enterprises.
http://www.cisco.com/c/en/us/products/collaboration-endpoints/ip-phones/index.html
Use the following ranges to budget the installation of a business phone system: 5 to 15 phones: $1200 16 to 25 phones: $2200 25 to 50 phones: $3000 50+ phones: $50 per phone Of course there are many variables that will affect the ultimate cost, but I hope the guide I have provided can be a useful tool for budgeting.
http://www.granitecomm.com/blog/bid/67170/How-Much-Does-a-Business-Phone-System-Cost
The portfolio of Cisco IP phones includes user-friendly, full-featured internet phones to meet the needs of your entire organization, ranging: 1  From the company lobby to the desks of your busiest managers. 2  From the manufacturing floor to the executive suite. 3  From home offices to information workers.
http://www.cisco.com/c/en/us/products/collaboration-endpoints/ip-phones/index.html
Internet can be as basic as DSL ($85 per month) to very high speed fiber services. Cable internet will run you about $100 per month. For a mid sized business needing phone and internet, budget $600 per month and you'll be in the ball park. Telephone stations: Again, there is a range. Budget $200 per station for a digital phone system, or $350 per station for and IP phone. If you need a reception phone with a call director (buttons for each extension or software based console) add $750. If you need a conference phone they are $650 for a standard conference room.
http://www.granitecomm.com/blog/bid/67170/How-Much-Does-a-Business-Phone-System-Cost
You can find pay-as-you-go plans as low as $1 per month, to plans with free minutes from $9.99 per month. If your business is a high volume call center, you will definitely notice the dramatic cost savings on usage after switching to VoIP. With VoIP service, international calls can go for as low as 1 cent per minute.
https://telzio.com/blog/cost-benefits-switching-voip-service/
Office Phones. VoIP service can be used with existing phones by purchasing a small adaptor for $40 that connects the regular phone to the Internet and enables it to make and receive VoIP calls. New IP phones can be purchased from around $50 or $300-$600 for high-end models. For many businesses switching to VoIP, office phones are by far the greatest and sometimes the only initial expense.
https://telzio.com/blog/cost-benefits-switching-voip-service/
The average savings businesses see after switching to VoIP range between 50% to 75%. While the amount of savings can vary greatly by case, 99.99% of customers see a reduction in their phone expenses.
https://telzio.com/blog/cost-benefits-switching-voip-service/
They generally offer several pricing levels based on the number of lines needed, ranging from about $20 per line for large organizations to $35 per line for smaller groups; you also pay more for some added features like integration with cloud business services such as Salesforce.com.
http://www.pcmag.com/article2/0,2817,2483780,00.asp
In today’s business environment, your organization must meet the needs of a wide range of endpoint users with different communication styles and distinct workspaces. Some users want to communicate through their desk phones. Others prefer wireless devices.
http://www.cisco.com/c/en/us/products/collaboration-endpoints/ip-phones/index.html
So you're looking at upwards of $50 just for landline service from the traditional Ma Bell duopoly. VoIP services cut that monthly bill significantly. A Vonage line will run you $9.99 the first year and $26.95 thereafter. A newer player, PhonePower, will get you unlimited U.S. and Canada service for $14.95 per month with a 2-year commitment. And you can get unlimited U.S. and Canada calling with Skype, plus an inbound phone number for just $7.95 per month.
http://www.pcmag.com/article2/0,2817,2483780,00.asp
average cost of ip phone service per use
The average cost of Internet Protocol phone service per use is $350. The average cost of IP phone service per use is $350.