2N Lift emergency phone 2N LiftNet - Manual, 1446 v1.8.3 - Manual (Page 20)

PSTN Central Unit 2.1
20
2.1 PSTN Central Unit
Description
Power supply
Green OK (battery full)
Green flashing Battery charging
Red Battery failure
Off Power failure, more than 1 hour of
operating time remains
Red flashing Power failure, less than 1 hour of
operating time remains
Red flashing after
power up
Audio unit FW upgrade proceeding
Telephone line
Green Line OK, ready (on-hook)
Green flashing Line picked up (off=hook, call)
Red Line failure (no dialtone)
Communication
No light Relax (ALARM reset)
Yellow ALARM activated (calling)
Green Call confirmed (ALARM
announced) / Fireman activated
Green flashing Incoming call
Yellow flashing Triphony
Fast green flashing Programming from dispatching office
Fast yellow flashing
Alternate
yellow/green
flashing
Programming from machine room
Bus busy
Bus connector
(to audio units)
Telephone line
connector
Supply
connector
USB connector
(for programming, upgrading etc.)
Warning
 Do not open the CU during the warranty period.
 Later, open for battery replacement only.
Figure 2.2
Central Unit
Connectors
Figure 2.1
Central Unit
LED Indicators