Mailbox greetings play when a caller reaches a user's mailbox. There are two greetings: one that plays when the user's phone is busy and the other when they don't answer or when they have their phone in Call Forwarded Always to voice mail. The default no-answer greeting plays a message recorded by the user. A typical user-recorded greeting would identify the user and inform callers that they are unable to answer their call� example: "Hello. You have reached John Doe. I am in today but missed your call. If you would like, please leave your name, telephone number and message at the sound of the tone and I will return your call as soon as possible. Thank you."
Cox Business only masks caller id upon your request, and there is no upfront or recurring charge for this service. If you are unsure about whether or not your caller id is masked, contact a Cox representative. If your caller id is masked on your phone lines, you will need to follow this process to initialize and check your voice mailboxes:

A professional voicemail greeting is a recorded message that welcomes callers to your business when no one is available to pick up the call. For a polished call experience, the greeting should reflect who the client is calling – whether a general business number, department, team, or individual – and when the customer can expect the call to be returned.
The phone you use to record your greeting – and your surrounding – can turn your carefully scripted greeting into an unprofessional mess. Background noise is terribly distracting, so choose a quiet room or parked car to make your call. Landlines, or a “wi-fi enabled” cellphone call, can provide much better connection quality than a standard cellphone. If you must use a cell phone, be sure to use a high-quality headset for the best clarity.