... IP Phone eSpace 7810 is the next generation 2-line desktop phone using Session Initiation Protocol (SIP). It ... contact, message, headset, call transfer, hands-free, redial2 LINE keys6 navigation keysVolume keyCall featureCall hold, call transfer, call ... , call hold, call transfer, conferencehands-free, muteredial6 LINE keys10 programmable keys4 soft keys6 navigation keysVolume keyCall featureCall ...