Connecting Switching Systems With Dxlink Connectors - AMX Enova DGX 8 Instruction Manual

Connecting Switching Systems with DXLink Connectors

Switching systems with DXLink Twisted Pair support (e.g., an Enova DGX Switcher and an Enova DVX-3150HD) can
be connected via their DXLink (RJ-45) ports.
Important: This section does not refer to the linking of enclosures from CPU to CPU, which is not supported
in the Enova DGX Switcher.
In an installation with a multiple-stage switching system, the following applies:
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* For example, the path through 3 switchers could be: source device  Enova DVX-3150HD (out a DXLink/HDMI
port)  Enova DGX 32, DXLink input (out a DXLink port)  Enova DGX 16, DXLink input (out a DXLink port) 
DXLink Receiver  display device as an HDMI signal.
Avoiding Network (Ethernet) Loops
Caution: Be careful not to create a network (Ethernet) loop.
Only one connection to a LAN is permitted within a switching system with DXLink support.* Network loops must be
avoided. A network loop is created when the enclosure and one or more DXLink Modules or Wallplates within the
system are connected to a common LAN. The Enova DGX Switcher does not support STP (Spanning Tree Protocol).
* This applies to systems with DXLink Twisted Pair and/or DXLink Fiber Boards.
Example
In the example in FIG. 49, a network loop was created when an Enova DGX 16 was connected to a LAN and one of its
DXLink Transmitters was connected to the same LAN. The DXLink Transmitter needs to be disconnected from the
LAN. The same problem would also occur if an enclosure and one (or more) of its DXLink Receivers were connected to
a common LAN.
Source device
DXLink TX
FIG. 49
Avoid network loops
Instruction Manual – Enova DGX 8/16/32/64 Digital Media Switchers
When two switching systems with DXLink support are connected via their DXLink ports, only video and
audio will be passed through the DXLink connection.
When a DXLink input or output on one switching system determines that it is connected to a DXLink input or
output on another switching system, the DXLink port will automatically disable all Ethernet, power, and
control on that connection port so that the only things passed down the DXLink line are the video and audio
signals.
When connecting switching systems via DXLink ports, AMX recommends no more than 3 switcher
throughputs.*
Network loops must be avoided (see below).
Enova DGX DXLink™ Twisted Pair Boards
LAN
Local Area Network
Enova DGX 16
LAN
connection
Destination device
94