Manual
Model 370A User Guide Issue 2, August 2019
Studio Technologies, Inc. Page 17
MODEL 370A
INTERCOM BELTPACK
state. This allows one or both talk chan-
nels on a specific Model 370A that have
been enabled to be remotely disabled.
The reason for this function is simple. It’s
common in intercom applications for us-
ers to enable a talk channel and then go
“off headset,” forgetting that they’ve left
that talk channel enabled. While they take
a break or go to lunch, all other users are
forced to listen to that channel which may
include 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 recognized.
Either or both can be enabled as desired.
It’s also possible to disable the mic kill
function.
If the Device ID method of activating
mic kill is enabled, whenever a specific
Model 370A is identified using the Iden-
tify command within Dante Controller or
STcontroller any enabled talk channel
will be forced to its disabled state. If the
Global Kill Command method is enabled
the Model 370A will respond to any such
request and force all talk channels to their
disabled state.
Technical Notes
IP Address Assignment
By default the Model 370A’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
is active on the LAN. Even two Dante-
enabled devices that are directly intercon-
nected using an RJ45 patch cable will,
in most cases, correctly acquire IP ad-
dresses and be able to communicate with
each other.
An exception does arise when trying to
directly interconnect two Dante-enabled
devices that use Ultimo integrated circuits
to implement Dante. The Model 370A
uses the Ultimo “chip” and, as such, a
direct one-to-one interconnection to an-
other Model 370A (or other Ultimo-based
product) is not supported. An Ethernet
switch linking the two units is required
to successfully interconnect two Ultimo-
based devices. The technical reason that
a switch is required relates to the need for
a slight latency (delay) in the data flow.
And an Ethernet switch will provide this.
While this is certainly an anomaly, since
PoE power is required for Model 370A
operation it’s highly unlikely that an ap-
plication would use two Model 370A units
without a PoE-enabled Ethernet switch
being present.
Using the Dante Controller software ap-
plication the Model 370A’s IP address
and related network parameters can be
manually set for a fixed (static) configura-
tion. While this is a more-involved process
than simply letting DHCP or link-local
automatically assign an address, if fixed
addressing is necessary then this capabil-
ity is available. But in this case it’s highly