Simultaneous Ring allows you to have multiple phone numbers ring simultaneously when calls are received on your Spectrum Business Voice phone. (Some carriers refer to this as “call forking”.) The first line to answer will be connected and the other lines will be released. If any line in the Simultaneous Ring list goes to voicemail, then the other lines will be released. You can have up to five additional terminating locations including non-Spectrum Business numbers (cell phone, home phone, MSN Messenger Call Client, etc.) in addition to their main line. TNs must be 10-digit domestic TNs; either Spectrum Business or non-Spectrum Business, or Toll Free. Numbers can be domestic long distance numbers, including Canada. All other international destinations are prohibited.