Question: How easy is it to control an Extron NAV system using a Crestron processor? We have a room with 17 displays and 55 transmitters. 

Hi Ronald,

you send SIS commands from the Crestron controller to the Extron NAVIGATOR on port 4523 using SSH.
SIS commands are documented in the NAVIGATOR user guide, matrix tie command is \x1B2*3!\x0D to tie audio and video from input 2 to output 3 (looks familiar if you controlled Extron matrix switchers before).
The NAVIGATOR does not support telnet but SSH only.

Control of devices like projectors connected to the NAV decoders via RS232/IR/CEC is possible when using an Extron controller.
However, the ports, protocols and SIS commands for this purpose are not documented in the user guide of the NAVIGATOR/NAV decoder.

Best regards
Crestronfreak55

You don't by any chance have an example program for this do you? We haven't been able to login to this unit.