it depends on what kind of business telephone system you are referring to; do you want wireless services, land line services, both; it really depends what your're looking for.
I would say contact your local telephone systems provider that you are currently using and see what they can offer to set up for your business choices.
Your best source of information on business telephone systems and options will be your phone services provider. There are some major security issues that must be addressed with business phone systems.
The term is actually PBX telephone systems. There are many websites that contain information on it. Among them are Cisco, Virtual PBX, Ring Central, and Wikipedia.
Fortunately, business telephone systems are not that difficult to figure out in this day and age. Various pieces of equipment are put together into a system that can do many things. Common systems include telephones, routing equipment, and plenty of other devices. With that in mind, a business should absolutely consider installing a business telephone setup that suits its needs. Doing so is affordable and beneficial in more than one way. It does not take much work to get used to one of these hookups either.
One can find information concerning Nortel phone systems from websites like Unique Comm, TMSI, Digit Com, Business Telephone, Telephone Magic and Clear Lines.
There are a number of websites that allow one to learn more about business to business sales. One can get such information from 'Wikipedia', 'Entrepreneur' and 'About'.
"Most office telephone systems are more than one year old. The life of the office telephone system depends on the durability of the system, the abuse it is put through, and its usage."
The OSIsoft website specializes in many different business systems. One can learn more about the specifics surrounding OSIsoft practices on the official website.
Someone could learn more about business strategy consulting, by going the the website IBM. At this website if you search business strategy consulting, you will find a bunch of information to help you learn more.
You can go to a sight specific for office telephone systems or you can go to a phone carrior such as bellsouth or you're local phone company and ask them direct.
Online search engines provide many links for information on office telephone systems. You can also find more informationation at you local electronic stores.
You can learn more about starting a business by going to sba.gov It will show you all the requirements and needs to pursing your business. It will show you how to budget your business, as well as promoting your business.