User Guide Manual
SMX System MultiMatrix Switcher • Introduction 5
Three front panel security lockout modes (executive modes) — If a matrix switcher is 
installed in an area where operation by unauthorized personnel may be a problem, either of 
two security lockout modes can be implemented (the third mode is unlocked). When a front 
panel locked mode is enabled, a special button combination or SIS command is required to 
unlock the front panel controller and make the front panel operational.
Upgradeable firmware — The firmware that controls all switcher operation can be 
upgraded on location through the serial port or the Ethernet port, without taking the 
switcher out of service. Firmware upgrades are available for download on the Extron 
website, www.extron.com, and they can be installed using the Windows-based control 
program or the built-in HTML pages.
Button labeling — The Extron button label software lets you create labels to place in 
the front panel I/O buttons, with names, alphanumeric characters, or color bitmaps. 
Alternatively, labels can be made with any Brother
®
 P-Touch
®
 or comparable labeler.
Operational flexibility — Operations such as input and output selection, setting of 
presets, and adjustment of audio levels can be performed on the front panel or via the 
Ethernet or serial link. The serial links allow remote control via a PC or control system. The 
Ethernet link allows multiple remote links with two levels of password-protection.
• Front panel controls — The front panel controls support input and output selection 
and grouping, preset creation and selection, RGB delay, audio gain and attenuation, 
and volume control (audio models).
• Windows-based control program — Via serial port or Ethernet remote control, the 
Windows-based control software provides a graphical interface and drag-and-drop or 
point-and-click operation. 
• Simple Instruction Set (SIS) — SIS commands provides easy programming and 
operation.
Switching flexibility — The SMX provides individually buffered, independent matrix 
switched outputs with audio follow and audio breakaway for audio models:
• Tie any input to any or all outputs
• Quick multiple tie — Multiple inputs can be switched to multiple outputs 
simultaneously. This allows all displays (outputs) to change from source to source at the 
same time.
• Audio follow — Audio can be switched with its corresponding video input via front 
panel control, under Ethernet, RS-232 or RS-422 control, or by giving the video and 
audio boards the same plane address.
• Audio breakaway — Audio can be broken away from its corresponding video signal. 
This feature allows any audio signal to be selected with any video signal simultaneously 
to one or all outputs in any combination. Audio breakaway switching can be done via 
Ethernet, RS-232 or RS-422 control, or by giving the video and audio boards different 
plane addresses.










