As an option to the SIP Talkback speaker, the VoIP Remote Call Button enables calls to the Talkback Speaker that can be initiated or answered from a remotely-mounted switch. When enabled through the Web interface, if the Remote Call Button is pressed, the speaker would initiate a SIP call to a predetermined extension. When the Talkback Speaker is called from a remote phone and Auto-Answer is not enabled within the unit’s Web interface, the LED on the Remote Button will blink. The call will be answered when the button is pressed.