First and foremost, you need to ensure that you will have good support from your conference call provider. If there is a problem, you need to be able to get it fixed at any time. Many larger businesses sacrifice customer service quality in order to keep prices low, but it isn't worth it in the long run. The few dollars you save will pale in comparison to the hours of frustration that a downed conference call line will cause.
Second, you should really make sure that you are getting a good overall package from your provider. In particular, you should make sure that you are getting a nice VoIP connection. This somewhat advanced technology is the version that actually allows virtual meetings through conference calls, as opposed to the old static-filled speaker conversations.
Third, you have to look at the technology that the entire company uses. If possible, you should try and buy a plan that allows for instant messaging through a secure web conference setting. It is even better if you can get a secured storage center that will allow your employees to share necessary files with each other over a secure line. Your clients should really appreciate your efforts to protect their information.
The technology that they offer is also a great gauge for the true quality of the provider. Are they ahead of the times or lagging behind? You will preferably seek a company that offers the latest technologies to its customers, since this service will be much more likely to led the way in advances and make sure that you remain on the cutting edge.
Fourth, price shouldn't be the deciding factor, but you also have to make sure that you aren't going to be overcharged for your standard use of the line. It is generally a bad idea to go with a plan that relies solely on minutes of use. A major business doesn't need its employees counting the minutes during a major discussion with a client. A good provider should offer an option to just let you establish a set number of users with effectively unlimited use of the internet and phone connections for a reasonable monthly fee.
The fifth and final tip is to check all of your sources carefully. Just because a provider says that they are global doesn't mean that they really are. A true global provider should have local offices in regions throughout the world. Then they could offer real assistance in the event of any communication issues. It is at least worth a few phone calls or internet searches to see if they really have as wide reaching of a network as they claim.
With these tips in mind, you should be more than able to comparison shop with a set idea in mind and find the best service for your business.