One of the most important purchases that your business can make is a business telephone-system. For most of the people, it is the easiest way to communicate and get in touch with the customers and clients as well as business associates and partners within the same firm.That being said, when buying business telephone-systems, you need to make sure about the quality of the product and the service that you would be availing.When setting up your business telephonic systems, there are certain issues that need to be kept in mind. First and foremost would be the wiring required for the set-up. If you have to rewire your present place, make sure that you get hold of extra wire. It may cost you more but would help save money in the future if you plan on extending your telephone-system, entailing greater wiring space.You can also ask your colleagues and other business associates, who have a business telephone-system installed, about the effectiveness of their system. Do not be shy in enquiring about anything that you may need to know in depth. Their views on its functionality can help you decide the best way to go about installing your own business telephone-system.Compatibility is another area that needs to be kept in mind. Make sure that the telephone-system you purchase is compatible with any existing accessories, related to the system in one way or another. A good example would be your voicemail. It is always better to purchase a telephone-system that is compatible with most related accessories available in the market. This way, when you do decide to make changes to the related accessories, or for example, get a voicemail, they would still be compatible with the telephone system.Negotiating never does any harm. When purchasing your telephone-system, try getting a discount on your purchase, especially when it is meant for a larger networking system in the office. Even if you do not get a discount, you can make sure that any maintenance work carried out after purchase and installation is at a discounted rate, if not entirely free of cost.It is also essential that you test the system before committing to buy it. Many times, pre-testing the business telephone-systems seems the answer to your prayers. However, it can be a whole other story in case of post-testing. Rigorously test your system, the way you would in a routine office day. Check the clarity of the sound and make sure there is no distortion. Also, look if it is checking and saving voicemail is an unproblematic process. You can always ask for opinion and advice from the IT experts at your office.The VOIP (Voice over Internet Protocol) is a good option that can be made use of if you have employees who work from home. This tends to minimise communication costs and is very effective.Your business telephone system is ready to work once you have followed these general guidelines.