The information you want to put in your voicemail greeting should be concise enough for your prospects to get every bit of information they need. Leave the relevant information in a clear and precise manner.
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.

For locations where a desk phone is required but no Ethernet cable is nearby, Yealink offers an option to use it’s reliable and secure DECT wireless extender or you can use your Wi-Fi if you prefer for quick and easy desk phone placement in places where no Ethernet cable is easily accessible — an ideal solution for installations that simply cannot run new Cat6 cabling everywhere.
5. Hi, this is [your name]. I can’t get to the phone right now, but please leave a message with your name and number, and I’ll get back to you as soon as possible.