Mitel 470 - Page 147

Installation
147
Mitel 470 as of R4.1
syd-0585/1.2 – R4.1 – 08.2016
FXS mode: Control input
If FXS interfaces are configured as control inputs, one or more of the switch groups
can be switched between Positions 1, 2 and 3. An external switch or a relay is con-
nected for this purpose. An LED can be connected to the circuit to indicate the switch
state. The no-load voltage is 24 VDC; the current is limited to 25mA.
The permissible switch and loop resistances are as follows:
• Active state (On): < 1 kΩ
• Passive state (Off): > 4 kΩ
There are no special requirements for the cables.
Warning
Control inputs must have a floating connection.
Fig. 61 Connection for FXS mode: Control input
In the switch group configuration in ( =xb) the ports are assigned to the control inputs
of a switch group. To be able to control all 3 switch positions of a switch group, you
need 2 control inputs which switch the switch position of the switch group depending
on the status.
Tab. 72 Switch group control via the control inputs
Other conditions:
• The same control inputs can control one or more switch groups.
• The same switch group can only be switched by the 2 assigned control inputs.
• Control of the switch groups using the control inputs takes priority over control using
function codes.
FXS control input 1 FXS control input 2 Switch positions of the switch group
Off Off Position 1
On Off Position 2
any On Position 3
a
b
24 VDC
25mA
FXS interface