CLI Command ReferencetalkbackMakito X User’s Guide, v2.2, Issue 02 361talkbackS YNOPSIStalkback starttalkback stoptalkback settalkback gettalkback clearDESCRIPTIONThe talkback command is used to manage audio talkback settings. The audio talkbackfeature allows users to stream a mono channel of audio back to a Makito X encoder over areliable LAN or WAN. See “Audio Talkback” on page 40.The talkback is sent by a software player application (such as Haivision’s InStream) to theMakito X, where it is played out of the encoder’s 8-pin Mini-DIN connector. See“Talkback Audio Format Specifications” on page 363.The talkback application receives the 16-bit audio (mono) at 22.05 kHz rate, packetizes itto 440 16-bit samples (the last 4 bytes are reserved), and transmits them to Makito X UDPport 9177.NOTE The source UDP port of sender does not matter; however, the destination has tomatch what is configured on the encoder (9177 by default).There is no audio mixer on the Makito X, so the encoder handles the talkback sessions ona first-come first-serve basis. To prevent a single user from monopolizing the talkback, theInStream software player provides “push-to-talk” functionality, which requires that thetalkback user physically push and hold a button to transmit audio. When the button isreleased, the talkback application stops sending audio. The Makito X considers the sessionterminated if it does not receive a packet for a duration of one second (i.e., after at least onesecond of inactivity). The Makito X is then ready to accept the session (talkback packets)from another device.The Talkback network service may be stopped or started from the Web interface (Servicespage) or using the service command.Talkback is not configurable through SNMP in the current release.TIP It’s a good idea to save your configuration if you are running Talkback in order toavoid having to restart Talkback after a reboot.
