Aastra 470 - Page 161

Installation
161
Aastra 470 ab R3.0
syd-0337/1.5 – R3.0 – 05.2013
Detailed Description
The block diagram below illustrates how the EFOP fan-out-panel operates. The
lines are switched over by relays. When relays are in a de-energised idle state, the
emergency phones are connected directly with the analogue exchange lines
(PSTN). For each port the relay switching status is indicated by an LED.
[1] relevant only with APS2 auxiliary power supply unit in redundancy operation
Fig. 66 Block diagram, EFOP fan-out-panel
[1]
FXO
FXS
1 … 8
1 … 8
Voltage
detection
AC / DC
Control
AC / DC
1 … 8
1 … 8
1 … 8
EFOP
115/230 VAC
115/230 VAC
Auxiliary
power suply
unit (APS2)
M
ains power 2
Mains power 1
PSTN
Communication server