s terminal and of transmitting signals related to streamed content to content server 330 furthermore in addition to conventional telephony based signaling and voice signals private branch exchange 310 is also capable of transmitting and receiving internet protocol ip data packets session initiation protocol sip messages voice over ip voip traffic and stream related messages e g real time streaming protocol rtsp messages etc to and from ivr system 320 it will be clear to those skilled in the art after reading this specification how to make and use private branch exchange pbx 310 interactive voice response system 320 provides all the functionality of interactive voice response system 120 of the prior art and is also capable of transmitting commands to content server 330 e g starting playback of a content stream stopping playback of the content stream queueing another content stream etc and of receiving information from content server 330 e g an indication that playback of a content stream has begun an indication that playback of a content stream has completed etc it will be clear to those skilled in the art after reading this specification how to make and use interactive voice response system 320 content server 330 is capable of retrieving content from content database 340 of buffering and delivering a content stream.