The 8 button phones can be programmed to your exact business needs (for functions like call park, paging, direct access of another extension, etc). Additional Grandstream phones consisting of various different models (including color-display extensions) can be easily added to this system. Built-in Call Detail Records (CDR) for tracking phone usage by line, date, etc. Supports multi-language auto-attendant and call queue to efficiently handle incoming calls. System has built in features such as: encryption security, call recording, phonebooks, voicemail to email, fax to email, and system backup. If your not sure that this system is not the right system for your business, we will assist you choosing the right system for your business. Most systems that we sell can be easily installed on your current CAT 5 (or higher) network, saving you a lot of money. We offer many different system options, let us recommend the right system for you.