1 TCAS Computer,
Interface w/ Transponders Sys (Transponders, Ctrl panel), DADC Sys, Symbol Generator (EFIS), VSI (Non-Efis), IRU (Aircraft heading
TCAS interrogates the transonders of other Mode-S transponder equipped aircraft to determine/and avoid collison (Traffic Collision and Avoidance System). Since transponders get altitude info through interface w/DADC and Hdg from the IRUs, (not the only inputs) the interrogating TCAS computer can determine whether an aircraft is a threat. The interrogated aircraft then responds to the TCAS computer. TCAS, with its own interface with the IRU, knows where it is. If it is not a threat, TCAs will continue to keep and eye on the aircraft as long as it is within range. If it is a threat, TCAS will try to resolve the conflict. It resolves the conflict by displaying warnings on teh EADI and EHSI (EFIS) or the VSI and the Wxr Radar Display unit (Non_Efis). There are also aural warnings such as TRAFFIC, CLEAR OF CONFLICT, CLIMB, and DESCEND.
There is more to it, but that's TCAS in a nutshell.
Now having said that, there is no possible way in the world you are and Aircraft Maintenance Engineer. But before it sounds like I'm trying to make you look bad, can you please define and Aircraft Maintenance Engineers Responsibilties in India. I don't know everything by far, but there are just some things that Aircraft Maintenance Engineers SHOULD KNOW!! I'm not knocking you, but I'm just wondering......
Please respond, because I'm really curious as to what the title Aircraft Maintenance Engineer is equivalent to in the US