If you are worried about missing a call on your Internet Phone (VoIP) number/phone you can simply forward calls to other numbers when you’re out of the office or not home.
To do this simply dial the appropriate number below:
Call Forward No Answer/Unavailable Activate *52
Call Forward No Answer/Unavailable Deactivate *53
Call Forward All Activate *72
Call Forward All Deactivate *73
Call Forward All Prompting Deactivate *74
Call Forward Busy Activate *90
Call Forward Busy Deactivate *91
Call Forward Busy Prompting Deactivate *92
You will then be prompted to enter your extension which is your SIP number (The number you use to login during setup of your Internet Phone (VoIP) account)
And then simply follow the prompts to enter your number.