Studio Technologies 372A, User Manual

Page: 8 / 23

Issue 1, April 2019 Model 372A User Guide
Page 8 Studio Technologies, Inc.
MODEL 372A
INTERCOM BELTPACK
Future Capabilities and
Firmware Updating
The Model 372A was designed such that
its capabilities and performance can be
enhanced in the future. A USB connector,
located on the unit’s main circuit board (un-
derneath the unit’s cover), allows the appli-
cation firmware (embedded software) to be
updated using a USB flash drive.
The Model 372A uses Audinate’s Ultimo™
integrated circuit to implement the Dante
interface. The firmware in this integrated cir-
cuit can be updated via the Ethernet connec-
tion, helping to ensure that its capabilities
remain up to date.
Getting Started
What’s Included
Included in the shipping carton are a Model
372A Intercom Beltpack and a printed copy
of this guide. As a device that is Power-over-
Ethernet (PoE) powered, no external power
source is provided. In most applications an
Ethernet switch with the required PoE capa-
bility will be utilized.
Connections
In this section signal interconnections
may be made using the three connectors
located on the bottom of the Model 372A’s
enclosure. An Ethernet data connection
with Power-over-Ethernet (PoE) capability
will be made using either a standard RJ45
patch cable or an etherCON protected RJ45
plug. A dual-channel or single-channel (dual-
or single-ear) headset will be connected
using a cable-mounted 5-pin male XLR
connector. Alternately, a headset with a
3.5 mm 4-conductor TRRS plug can be
used. (The headset’s plug needs to follow
the CTIA™/AHJ configuration standard.)
Ethernet Connection with PoE
A 100BASE-TX Ethernet connection that
supports Power-over-Ethernet (PoE) is re-
quired for Model 372A operation. This one
connection will provide both the Ethernet data
interface and power for the Model 372A’s
circuitry. A 10BASE-T connection is not suffi-
cient and a 1000BASE-T (“GigE”) connection
is not supported unless it can automatically
“fall back” to 100BASE-TX operation. The
Model 372A supports Ethernet switch power
management, enumerating itself as a PoE
class 1 device. Any source that is compliant
with the IEEE® 802.3af standard will function
correctly. Should the selected Ethernet switch
port support Energy-Efficient Ethernet (EEE)
it must be disabled to help ensure reliable
Dante operation.
The Ethernet connection is made by way of a
Neutrik etherCON protected RJ45 receptacle
that is located on the bottom of the Model
372A’s enclosure. This allows connection by
way of a cable-mounted etherCON connector
or a standard RJ45 plug. The Model 372A’s
Ethernet interface supports auto MDI/MDI-X
so that a crossover cable is not required.
Headset Connections
The Model 372A allows two different types
of headsets to be connected. A 5-pin female
XLR connector is provided to support con-
nection of a standard broadcast- or intercom-
style communications headset. A 3.5 mm
4-conductor TRRS jack allows a computer
gaming headset to be directly connected.
The Model 372A’s two headset connectors
are electrically wired in parallel. As such, only
one type of headset should be connected at
one time.
Headset A
The Model 372A provides a 5-pin female XLR
connector that interfaces with the microphone
and headphone connections of a single- or