МS2М-А module

MS2M-A performs the following ICS functions:

• internal telephone communications among the six crewmen (two pilots and cargo cabin users) during flight;
• internal telephone communications between pilots, cargo cabin users and ground maintenance personnel (GMP) during preflight preparation;
• selection of the internal communications network (network 1 - cockpit; network 2 - cargo cabin);
• external communications via any of three airborne radio sets - Prima-DMV-1A, Prima-MV and Prima-KV;
• listening to the signals from three radio sets as well as simultaneous listening by the crew;
• listening to NAV signal by the crew;
• listening to special tone signals;
•  listening to external radio communication signals during internal communication and listening to signals of internal communication during external radio communication;
• listening to VWS signals;
• independent intercom and external communication volume tuning for each crewman;
• independent NAV signal listening volume tuning for each crewman;
• adjustment of the volume of the radio set for additional listening;
• transmission of the signals to cockpit voice recorder;
• transmission of the signals to passenger addressing system (PA);
• transmission of the signals to public addressing system (SGU)

MS2M-A provides RCE equipment controlling:

• control of three radio sets from radio control panel (RCP) - B8-171 unit;
• control of three radio sets from external devices;
• receiving and processing of selective call via HF radio set;
• synchronizing of two RCP, two B7-29A5, one B7-171, one B7-29A4 unit and external control device operation;
• non-volatile storage of three radio sets radio data;
• control of three radio sets with indication of the selected operating modes;
• testing of interfaced RCE operability and the testing results displaying on RCP;
• indication of the operation mode of the radio set, controlled by external device

MS2M-A performs the following ICS functions:

• voice warning of the crew on the onboard emergencies;
• transmission of the signs, determining the required VWS messages replaying, via the radio set;
• recording of the replayed messages in non-volatile memory and their repeated replaying;
• sequential replaying of voice messages in case of the simultaneous receiving of the several input signals;
• breaking of the replayed message and availability of its full complete replaying when the input signal with higher priority is received at VWS input;
• manual breaking of any voice message as well as repeated listening of the message in case of the signal availability from transducer presence.