Crestron DM NVX Series Design Guide

18 • DM NVX System Design Guide – DOC. 7977F
Network Topologies
Connect devices such as control processors, touch screens, servers, personal computing
devices, and DM NVX endpoints directly to network switches. In a large network with
multiple layers of switch hierarchy, situate these devices at the network’s edge.
The network edge switches are often connected via uplinks to other switches and
routers. This aggregates traffic from the network edge and forms the network’s
core.
The relationships between network switches and their interconnection to each other
define the network’s topology.
The following general rules apply for sizing network switches in terms of switch fabric
nonblocking bandwidth:
• The network core must support a nonblocking bandwidth and port speed equal to
1 gigabit multiplied by the lesser of the total number of anticipated encoder
endpoints or the total number of anticipated decoder endpoints, plus the number
of USB extenders.
• The network edge must support a nonblocking bandwidth and uplink speed equal
to 1 gigabit multiplied by the greater of the total number of anticipated encoder
endpoints or the total number of anticipated decoder endpoints, plus the number
of discrete USB extenders.
Star
The default recommended network topology is a star. Using a fully nonblocking switch,
the star topology allows any combination of one or more endpoints to connect to any
other combination of endpoints. It also easily allows the network to grow beyond a single
switch if the uplink in the switch supports the maximum specified bandwidth.
For small DM NVX systems that employ only one network switch, use a nonblocking
switch to prevent a bottleneck. Star topologies can accommodate very large DM NVX
installations by using large modular switch frames.
Star Network Using a Nonblocking Switch
Tree
A tree network is a combination of more than one star network existing on a
core-switching infrastructure. The tree network allows failure in one part of the attached
star networks without widely affecting the other star networks.
Configure the core network, which is the larger network switch, for redundancy and
scalability.
Network switch
DM NVX
LAN
DM NVX DM NVX DM NVX DM NVX DM NVX
DM NVX DM NVX
DM-XIO-DIR-80

Crestron DM NVX Series Specifications

General

Latency	<1 Frame
Dimensions	Varies by model
Weight	Varies by model
Video Input	HDMI
Video Output	HDMI
Audio Formats	PCM, Dolby Digital, DTS
Audio Inputs	HDMI, Analog
Audio Outputs	HDMI, Analog
Control	Crestron Control System
HDCP	HDCP 2.2
Security	AES encryption