You may think your voicemail message is professional. But when you listen back it could sound rushed or shaky. Listen to it regularly to see if changes are needed.
15. “Hello, you’ve reached the Sales Department at [Company name]. All of our representatives are currently helping clients [insert goal such as, ‘achieve 40% growth through streamlining HR’] and are unable to take your call. Instead of putting you on hold and taking up your valuable time, please leave your name, company, and phone number and we’ll give you a call back ASAP. Thank you!”

It’s a professional phone system that is managed directly through your smartphone — meaning that you don’t have to invest in expensive equipment. The company has served business both large and small throughout their history and have low-cost plans.
VoIP security. As touched on above, the underlying protocol for VoIP is SIP and it wasn't built with security in mind. This means hackers are taking advantage of several new attack vectors. One example is a denial of service (DoS) attack specifically on a phone service rather than the network as a whole. This will garble or drop your service because it results in your connection quality degrading, heavy latency, and system crashes. Caller ID spoofing is also becoming more common. This amounts to a phishing attack using a phone rather than an email. By calling workers with a caller ID that looks like it's coming from inside the company, hackers are able to get employees to cough up all kinds of sensitive information because they think they can trust the person at the other end of the call.