System information

FCD 901 48
Issue R2A, 07.2009
XMP1 Release 5.5 System Description
Signal Concentrator
Page 6-54 Proprietary Information Aastra
6.6.9 Signal Concentrator
The signal concentrator provides the interfaces (sensors and transmitters)
to external devices.
Using the sensors, messages from external units can be processed. Control
functions from external devices are possible via the transmitters.
Possible message sources:
• Alarm messages from external unit with 7R signalling
• A / B / EL alarms
• ZA(A)/ZA(B) contacts
• Door contacts
• Fire detector
Possible controls via the sensors:
• Central alarm signalling
The following screenshot shows the "Signal Concentrator" mask in the
"Online Functions" window.