Ethernet (LAN) Port
The rear panel Ethernet connector on the switcher can be connected to an Ethernet LAN
or WAN. Communications between the switcher and the controlling device are via Telnet (a
TCP socket using port 23). The TCP port can be changed if necessary, via SIS. This connection
makes SIS control of the switcher possible using a computer connected to the same LAN or
WAN. The SIS commands and the actions of the switcher are identical to the commands and
actions the switcher has when communicating with it via RS-232.
Ethernet Connection
The Ethernet cable can be terminated as a straight-through cable or a crossover cable and
must be properly terminated for your application (see figure 29).
Crossover cable — Direct connection between the computer and the MPX 866 A
switcher
Patch (straight-through) cable — Connection of the MPX 866 A switcher to an
Ethernet LAN
A cable that is wired as T568A at one end
and T568B at the other (Tx and Rx pairs
reversed) is a "crossover" cable.
A cable wired the same at both ends is
called a "straight-through" cable, because
no pin/pair assignments are swapped.
12345678
RJ-45
Connector
Insert Twisted
Pair Wires
Pins:
Crossover Cable Straight-through Cable
Pin
1
2
3
4
5
6
7
8
Wire color
White-green
Green
White-orange
Blue
White-blue
Orange
White-brown
Brown
Wire color
T568A T568B
End 1 End 2 End 1 End 2
White-orange
Orange
White-green
Blue
White-blue
Green
White-brown
Brown
Pin
1
2
3
4
5
6
7
8
Wire color
White-orange
White-green
Blue
White-blue
White-brown
Brown
Wire color
T568BT568B
White-orange
OrangeOrange
White-green
Blue
White-blue
GreenGreen
White-brown
Brown
Figure 29. RJ-45 Ethernet Connector Pin Assignments
Default IP Addresses
To access the MPX 866 A switcher via the LAN port, you need the Extron IP address, and may
need the subnet mask and the gateway address. If the IP address has been changed to an
address comprised of words and characters, you can determine the actual numeric IP address
using the ping utility (see “Ethernet Connection” for more details). If the addresses have
not been changed, the factory-specified defaults are:
IP address: 192.168.254.254 Subnet mask: 255.255.0.0
Gateway address: 0.0.0.0 DHCP: off
MPX 866 A Media Presentation Matrix Switcher • Programming Guide 60
