Optimum is the first landline telephone service provider in the U.S. to launch High Definition calling. HD calling is the next generation of voice technology that gives you less background noise, sharper sound quality and increased clarity in your phone conversations. To experience HD calling, customers and call recipients must subscribe to Optimum Voice and use HD-capable handsets.
You already know the importance of staying in touch with your customers, whether they’re down the street or across the ocean. More than ever expanding into international markets is necessary for many growing businesses - and Business Voice offers competitive per-minute rates so international calling doesn’t have to be expensive.

You can’t always get to the phone when clients, partners, investors, or colleagues call you. When this happens, a professional voicemail greeting helps you make a positive impression and tells them what to do next. There are a variety of ways to convey your message. If you’re not sure what type of message to record for your own voicemail box, here’s a definitive guide to get you started.
Microsoft Voicemail (formerly called Unified Messaging or UM) is a service available for Skype for Business enterprise voice (telephone) users. Voicemail messages are delivered to your Outlook inbox and include an audio file with the contents of the message as well as a text transcription.