**ON A/C 151-199,

 -------------------------------------------------------------------------------
|  |  INDICATION  |
 |  -------------------------------------------------------------
| ACTION ----------------- | ------------ AURAL ------------------ | ------------- VISUAL ---------------- |---
-----------------| CALL  ------------| CHIME:  ------------------| ALL ATTND LS  -------------| RESP AIP:  ----------------| RESP ACP:  ---|
 | ATTND - ATTND  | 1x HI LO  |  | TEXT ON,  | PINK ON  |
 |  |  |  | GREEN IND  |  |
 |  |  |  | ON  |  |

 -------------------------------------------------------------------------------
**ON A/C 001-049, 051-099, 101-105, 151-199, 201-299,
 (b) Definition of Priorities All communication modes are handled with respect to the predefined priorities listed below:
 1 Emergency Call
_
 2 An call from flight compartment which includes:
_
 -an all call from flight compartment,
 -a normal call from flight compartment.
 3 An all call from cabin station
_
 4 A normal call from cabin station
_ Additionally, all interphone sources have interrelated priorities, as assigned in the CAM. There are eight priorities (1A, 1B to 4A, 4B) which can be individually assigned to the different interphone sources. If more than one interphone source requests the same communication mode, the source with the higher priority will have precedence. If they have the same priority, the interphone source which was dialled first will be given preference. When an interphone source requests a station which is engaged in another communication link:
 -
a busy indication at the AIP appears,

 -
a busy tone via the sidetone output will be transmitted. if this interphone source has equal priority to, or lower priority than the existing link. If this interphone source

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 has a higher priority, a then following action will be
 executed. The existing communication link will be interrupted and the new link will be established. The audible and visual calls will be activated as assigned for this communication mode. An "OVER" indication will be displayed at the AIP of the station.
 (4) Operation of the Interphone System (Ref. Fig. 039)
 (a)
 Energization
 Energization of the Interphone System is as for 'CIDS
 Energization'.

 (b)
 Interphone Operation Each application of the cabin and flight crew interphone system starts with a dial procedure. In the flight compartment, special keys are available for dialling the desired interphone function. The interphone equipment (for example flight compartment boomset) must be connected to the interphone system. The interphone function at the audio control panel must be selected. Indicator lights give visual feedback, which are also activated when an attendant station calls the flight compartment. A call indicator is activated at the audio control panel when an attendant calls the flight compartment. This indicator is integrated into the transmit button on the audio control panel. It must be switched if communication is to be established after a call has arrived (or has been activated) from the flight compartment. You can reset the indicator lights with the reset pushbutton on the audio control panel.

 (c)
 Interphone Operation from Attendant Station The interphone system is a telephone call-system that has a handset at each attendant station. With the keyboard on the handset you can start a call function. If an attendant station is called:

 1.
 the AIP of the called station gives a visual indication,

 2.
 a chime is heard at the attendant station and/or in the cabin. With the reset-key on the handset you can quickly start a new call function.

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 D. Passenger Lighted Signs
 (1)
 Architecture (Ref. Fig. 040) The components, interfaces and signal sources of the CIDS which are related to the passenger lighted signs system are as follows:

 (a)
 Flight Compartment

 -
the NO SMOKING switch,

 -
the FASTEN SEAT BELT switch.

 (b)
 Avionics Compartment

 -
the link to CFDS,

 -
　
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