Having experienced multiple "small business phone systems" (AT&T hard wired system - OK, AT&T SynJ wireless system - TERRIBLE, and a vTech system - almost as terrible) and for basically the same price plus a little bit of configuration time, the Grandstream products worked better, had more features and had much better sound quality than the others. I hope this helps. I bought this system for my office due to the affordable price. It initially had some problems with calls cutting out and poor call quality. I was going to return it, but the quality improved for a short while. The problems came back a week later and I had my phone guy look into the phones, wiring, and telecom installation. He said everything else was good but there was a problem with the phones. We hooked up a different system and viola! No more problems.
From home, dial *298 to access your voice mailbox. From outside your home, dial your home phone number and press *5 once the greeting starts. Dial the access phone number listed in your Cox Telephone User Guide. If prompted, enter your PIN followed by the pound ( #) key. 2. Press 3 to access the Greetings Menu. 3.

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Also note, this system works over your NETWORK (not your phone wires). It will connect to up to 4 standard phone lines (or Internet-based VoIP service) but the connection between the phones and the UCM6204 "base" are done over a Ethernet NETWORK. The bad news is that if you only have phone lines running everywhere (2 or 4 wires only) then you will have to run new wiring. The good news is that if you already have a computer network and computers at each phone location, these phones can be connected to that existing network. (If you only have one network jack per location, the phones' built-in network switch lets you "pass" the network connection through the phone to your computer so both can be connected).