Studio Technologies 371A, Руководство пользователя

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Issue 1, June 2018 Model 371A User Guide
Page 16 Studio Technologies, Inc.
MODEL 371A
INTERCOM BELTPACK
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 371A includes a mic kill func-
tion, 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 both talk chan-
nels on a specific Model 371A 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 371A 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 371A will respond to any such
request and force all talk channels to their
disabled state.
Technical Notes
IP Address Assignment
By default the Model 371A’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-en-
abled devices that are directly intercon-
nected using an RJ45 patch cable will, in
most cases, correctly acquire IP address-
es 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 371A uses
the Ultimo “chip” and, as such, a direct
one-to-one interconnection to another
Model 371A (or other Ultimo-based prod-
uct) is not supported. An Ethernet switch
linking the two units is required to suc-
cessfully 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 371A opera-
tion it’s highly unlikely that an application