How to stb to stb
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1. A and B connect rs232 cable stb stb
2. stb A you can put-Vol and power off / on
3. front display "HOST" -> _ _ H_ -> H (send ready status)
4. stb B power off / on
and then all data send from A to stb stb B

How to send user data
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1. A and B connect rs232 cable stb stb
2. A you can put in front stb power and power off / on
3. front display "HOST" -> _ _ U_ -> U (send ready status)
4. stb B power off / on
A data send from stb to stb and then User B

Boot from the device to the device menu is available to take the software and information ..