Auerswald COMpact 4000 Operation Manual page 79

Installation and Commissioning
ISDN End Devices
Available Bus Variants for the Installation of an Internal S Bus
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Short Passive Bus in Two Directions
This bus variant is suited as an alternative to the short passive bus in one direction if the PBX
is located in the centre of the cables to be installed. The terminators at the internal S port have
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to be switched off. See the following figure.
Extended Passive Bus
The extended passive bus with up to 4 wall sockets at the end is suited for the connection of
several end devices at large distances. Cable lengths of up to 500 m are supported. For this
bus variant, the wall sockets are connected on the last 35 m. The first 465 m remain free. The
terminators at the internal S port have to be switched on. See the following figure.
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COMpact 4000 - Firmware V6.6A - Installation, Operation and Configuration V03 03/2016