P/N PM000223A • Rev. 1 • ISS 9 August 2017
8
Installation Manual
Ascom Call system
System Cabling
2
System Cabling
High quality cables must be used when installing the system. All cables shall comply with
the specification TIA/IEA 568-A/B Cat 5/5e/6/7. This is a standard 4x unshielded twisted
pair (U/UTP) solid bare copper with a diameter of 0.5mm (AWG 24). Take care when
stripping cables from the outer jacket to avoid damaging the insulation of the wire cores.
The system wiring is classified as Class 2 Safety Extra Low Voltage (SELV); therefore,
cabling shall be separated from higher voltage systems through the use of separate
conduits or divided cable trays.
Sufficient free cable length shall be available during the installation of the dome lights,
lights, Passive Bus Concentrators (NUPBC), and Gateway II. Active and passive modules
shall have sufficient free cable left at the location of each module. A minimum length of
15cm (6 in.) is recommended.
The hallway bus, the Ethernet backbone, and the active room bus use RJ-45 connectors.
All cables shall be clearly marked at both ends. The passive bus uses detachable spring
case connectors instead of RJ-45 connectors.
2.1
System Overview
Figure 6 System overview
Legend:
(1) Ethernet system backbone
(2) Power, data, voice
(3) Hallway bus power
(4) Hallway bus data
(5) Passive room bus
(6) Active room bus
