Here are just a few of the top features of a VoIP phone system: Advanced Call Management Call Routing Anonymous Call Rejection Auto Attendant Business Text Messaging Call Analytics Call Forwarding Call Notify Call Park Call Presence Call Pulling Call Queues Call Recording and Rating Call Screening Call Transfer Custom Music on Hold Custom Ringback Mobile App Number Porting Online Fax SIP Trunking Three-way Calling Toll-Free Number Voicemail Voicemail Forwarding Voicemail Greetings Video Conferencing VoIP Switchboard