The above section details types of phrasing to avoid; however, it doesn’t detail what users should NOT say on their greeting. Though this is a bit loaded, as there are hundreds of combinations of things one shouldn’t say, there are some key components users should ALWAYS avoid. a. Forget About Slang: You should strive to be as professional and welcoming as possible in your greeting. While this may steer you towards using slang, in an attempt to make callers comfortable, it’ll most likely work against you. As a professional, your demeanor, tone, and speech should be clear cut and well articulated. Using slang undercuts this and works against you. b. Don’t Even Think About Profanity: This is a no-brainer. Never, under any circumstances, curse in your greeting EVER! c. Keep Your Sentences Clean, Don’t Ramble: Introduce yourself and give your caller specific direction. Avoid long diatribes detailing tangent thoughts. Keep it simple and quick. d. Always Return Your Calls: It’s important for callers to feel they are valued. Nothing dissolves this quicker than a greeting that doesn’t stress this. For example, “I’ll call you when I can,” “If I don’t return your call, please call back”—these phrases are terrible and completely destroy any good will you may have with a caller.
Don’t Get Creative With Your Voicemail Messages—Many high profile sales trainers advise you to leave all kinds of crazy messages on your voicemail as a way to stand out. What I find is that most of the people who try to do something creative with their voicemail messages end up sounding corny. In fact, seldom do creative off the wall voicemail messages make a positive impression on me. If you want to be viewed as a professional, then make sure your greeting presents you as one.

Interesting Read : Interactive Voice Response: What Is It And How Is It Beneficial?
I would highly recommend Sound Telecom on every level. First-class operation. Professional and responsive. Not one complaint or concern.