Business Telephone Systems - Tips For the Buyers One of the most important purchases that your business can make is a business telephone system. These are multi-functional and are equipped with features like VoIP, PBX, IP PBX, voice mail and auto attendant systems, Remote LAN access, Computer Telephony Integration, Customer Relationship Management and high speed internet access etc. For more information, visit at commsopro.com. in Businesswith business-telephone-systems-commsopro.comby 5 users