For one, be sure to understand QoS (mentioned above). This means going beyond understanding the concept and moving to how the networking equipment in your office -- or your employees' home offices if you're still at that stage -- can actually implement QoS. Most business-grade networking hardware will be able to handle QoS in more than one way, so testing which method will handle voice traffic more smoothly in your environment is important.
There was a time once we were mad for the funny voicemail greetings, creative voicemail greetings, it seems like that time has gone, now everyone leaves WhatsApp and iMessage instead of voicemails. For the exceptions, we have prepared this article to set up custom voicemail greetings on iOS with some sample Voicemail Greeting messages for iPhone, which takes almost less than two minutes if you correctly follow the steps. Undoubtedly, many professionals still actively use the voicemail feature for office purposes.

The bottom line is that a business’s situation is likely to change often and rapidly, each of which need a unique and applicable voicemail greeting to cover the circumstances and timeline. For example, callers shouldn’t reach a business-as-usual voicemail, and therefore expect a return call within the business day, if the subject they’re calling is out on vacation for two weeks. Such a lack of communication is a recipe to lose that caller’s trust and tarnish the brand’s reputation.
But with integration being at the heart of VoIP and UCaaS, you can't make a purchasing decision here without thinking about the future. On one side, consider each vendor carefully to see what they've done over the last half-decade in terms of product development and keeping up with VoIP and UCaaS trends. On the other side, think about what you'll need in the next five years.