(2)
 Cabin and Flight Crew Interphone System The cabin interphone system permits the telephone communication between all attendant stations and between the attendant stations and the cockpit.

 (3)
 Service Interphone System The service interphone system permits the telephone communication between groundcrew, cockpit crew and cabin crew when the A/C is on the ground.

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 (4)
 Prerecorded Announcement and Boarding Music (PRAM) System The CIDS transmits the prerecorded announcements and the boarding music to all passenger related loudspeaker.

 (5)
 In Flight Entertainment System (IFE) The IFE transmits audio programs and video sound to the passengers and shows video programs through video display units in the passenger compartment. The passengers can hear the audio programs and the video sound through the headsets and the loudspeakers. In addition, the director transmits PA announcements to the IFE. The IFE transmits the PA announcements to the headsets.

R **ON A/C 106-149, 301-399, 401-499,
 (6) Passenger Lighted Signs The passenger lighted signs system controls the No Smoking (NS), Fasten Seat Belt (FSB), Return To Seat (RTS) and EXIT Signs.
 (7) Passenger Call R The passenger call system controls the illumination of the passenger R call light and the activation of the call chime.
 (8)
 Cabin Illumination The cabin illumination system controls the illumination in the different cabin areas independently.

 (9)
 Reading Lights The reading light system controls the passenger reading lights and attendant work lights in the cabin.

 (10)
 Lavatory Smoke Detection The smoke detection system controls the visual and acoustic indications in the cabin, if smoke is sensed by the Lavatory Smoke Detectors.

 (11)
 Cargo Smoke Detection As part of the CIDS Smoke Detection Function (CIDS-SDF), the cargo smoke detectors sense smoke in the cargo compartment.

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 (12) Cargo Fire Extinguisher Monitoring As part of the CIDS Smoke Detection Function (CIDS-SDF), the Cargo Fire Extinguisher Monitoring function controls and monitors these fire-extinguisher parts: - Bottle-reservoir pressure, - Squip condition.
 (13) Air Conditioning The CIDS can select different temperatures for all defined zones. It is possible to do a fine adjustment of the preselected temperature for different cabin zones at the FAP. The temperatures which are in the different cabin zones are shown on the FAP.
 (14) Emergency Evacuation Signalling (EVAC) The EVAC system controls the evacuation signalling in all cabin areas and the cockpit. It can be operated from the cockpit, FAP or AAP during an emergency.
 (15) Potable Water Indication The potable water indication system shows the quantity of water, which is in the tank, on the FAP.
R R  (16) Waste Indication The waste indication system shows the quantity of waste water, which is in the tank, on the FAP. Also, unserviceable lavatories that do not operate are shown on the FAP and related messages come on.
 (17) Vacuum System Control Function (VSCF) The VSCF controls and monitors the Vacuum Toilet System. The system identifies each toilet assembly and starts the necessary actions of the related system components. 
R  **ON A/C 106-149, 401-499,
R R R R R  (18) Doors and Escape Slides Pressure Monitoring The doors and escape slide control system monitors the bottle-pressure reservoir of the doors and the escape slides at the passenger doors and emergency exits. It also monitors the status of the doors (open/closed) and escape slides (armed/disarmed). The status shows on the FAP. 

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 **ON A/C 301-399,
R R R  (18) Doors and Escape Slides Monitoring The doors and escape slide control system monitors the status of the doors (open/closed) and escape slides (armed/disarmed). The status shows on the FAP. 
R  **ON A/C 106-149, 301-399, 401-499,
 (19) Emergency Power Supply Unit (EPSU) The CIDS director initiates the BITE test of the EPSU, if a related command is given by the Centralized Fault Display System (CFDS). The director also transmits the results to the CFDS.
 (20) Drain Mast Control Unit (DMCU) The CIDS directors monitor a test of the DMCU, if a related command is given by the CFDS. A detected fault causes a related message and the caution light on the FAP to come on. Also, the results are transmitted to the CFDS.
 (21) CFDS Emulation on FAP This function provides the possibility to emulate reports from the Centralized Fault Display System (CFDS) on the FAP, like it is possible on the Multi Purpose Control Display Unit (MCDU) in the cockpit.
　
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