User Guide
Issue 4, February 2021 Model 374A User Guide
Page 18 Studio Technologies, Inc.
MODEL 374A
INTERCOM BELTPACK
(from among channels 1, 2, and 3) will add
20 kHz to their audio output channels and
have their associated LED flash, alternat-
ing between green and orange. (Green
indicates that the talk function is active
and orange indicates that the call function
is active.) Release button 4 and the send-
ing of call signals will cease. As expected,
pressing button 4 when no talk channels
are active will result in no call tones being
generated.
How to Identify a Specific
Model 374A
The Dante Controller software application
offers an Identify command that can be
used to help locate a specific Model 374A.
When Identify is selected it will send a com-
mand to a single Model 374A unit. On that
specific unit the four pushbutton LEDs will
light in a unique pattern. In addition, the
SYS and SYNC status LEDs, located di-
rectly below the etherCON RJ45 receptacle
on the bottom panel, will slowly flash green.
After a few seconds the LED identification
pattern will cease and normal Model 374A
button LED and Dante status LED operation
will resume.
If configured, the Identify command can
also cause the mic kill function to activate.
For details please refer to the next para-
graph of this guide.
Mic Kill Function
The Model 374A includes a mic kill function,
allowing talk buttons that have been placed
in their enabled (on) state to be remotely
changed to their disabled (off) state. This
allows one or more talk channels on a spe-
cific Model 374A that have been enabled to
be remotely disabled. The reason for this
function is simple. It’s common in intercom
applications for users to enable a talk chan-
nel and then go “off headset,” forgetting
that they’ve left the talk channel enabled.
While they take a break or go to lunch, all
other users listening to that channel may
hear unwanted audio! Having the ability to
disable this talk channel can be very useful.
A configurable choice in the STcontroller
software application is used to select which
of the mic kill methods, Device ID or Global
Kill Command, will be active. Either or both
can be enabled as desired. It’s also pos-
sible to disable the mic kill function.
If the Device ID method of activating mic
kill is enabled, whenever the specific
Model 374A is identified using the Iden-
tify command within Dante Controller or
STcontroller all enabled talk channels will
be forced to their disabled state. If the
Global Kill Command method is enabled
the Model 374A will respond to any such
request and force all talk channels to their
disabled state.
Technical Notes
IP Address Assignment
By default the Model 374A’s Ethernet in-
terface will attempt to automatically obtain
an IP address and associated settings
using the DHCP (Dynamic Host Configu-
ration Protocol). If a DHCP server is not
detected an IP address will automatically
be assigned using the link-local protocol.
This protocol is known in the Microsoft®
world as Automatic Private IP Addressing
(APIPA). It is also sometimes referred to
as auto-IP. Link-local will randomly assign
a unique IP address in the IPv4 range of
169.254.0.1 to 169.254.255.254. In this
way multiple Dante-enabled devices can
be connected together and automatically
function, whether or not a DHCP server