Haivision F-MB21B-R, Руководство пользователя

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CLI Command Reference
talkback
Makito X User’s Guide, v2.2, Issue 02 361
talkback
S
YNOPSIS
talkback start
talkback stop
talkback set
talkback get
talkback clear
D
ESCRIPTION
The
talkback
command is used to manage audio talkback settings. The audio talkback
feature allows users to stream a mono channel of audio back to a Makito X encoder over a
reliable LAN or WAN. See
“Audio Talkback” on page 40.
The talkback is sent by a software player application (such as Haivision’s InStream) to the
Makito
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 it
to 440 16-bit samples (the last 4 bytes are reserved), and transmits them to Makito
X UDP
port 9177.
NOTE
The source UDP port of sender does not matter; however, the destination has to
match 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 on
a first-come first-serve basis. To prevent a single user from monopolizing the talkback, the
InStream software player provides “push-to-talk” functionality, which requires that the
talkback user physically push and hold a button to transmit audio. When the button is
released, the talkback application stops sending audio. The Makito
X considers the session
terminated if it does not receive a packet for a duration of one second (i.e., after at least one
second 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 (Services
page) 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 to
avoid having to restart Talkback after a reboot.