Choosing a Provider For Your Office Telephone Lines A business telephone system is a multiline telephone system typically used in business environments, encompassing systems ranging from small key telephone systems to large-scale private branch exchanges. A good and reliable office telephone system will cater all your requirements and improve the overall experience of your callers. For more information, visit www.commsopro.com. in Businesswith commsopro.comoffice-telephone-providerby 6 users