i/o

Hello. I recently purchased a Bosch Autodome IP 5000 IR camera. The camera has 3 I/O for audio; Audio IN, Audio OUT and Audio GND. All three wires are 0.75mm2. I need a speaker and a microphone to have a 2-way communication-setup between the camera-operator and the people in front of the...

i have samsung techwin snp-6200rh. it works well with 4.0.1.x but with 4.0.2, it shows 'no signal, i/o error : 0'. :( any idea? can i get older version?