Expansion Stages and System Capacity
3.5 Power supply capacity
The maximum number of terminals connected to the system can be limited by the supply power available
for terminals. It is also important to take note of the maximum load per terminal interface.
3.5.1 Supply power available for terminals
The 40/48 VDC power supply required for the connected terminals is rated for the power requirements of a
typical system configuration.
Table 26: Power output of the 40/48 VDC power supply
Power output of the 40/48 VDC power supply
Available power output 24 Watt
The number of permissible terminals per system depends on the power requirements of the individual
terminals. To check the power requirements refer to Average power requirements of terminals for details of
the average power requirements of the terminals.
The total power requirements of all connected terminals must not exceed the available power output of the
power supply.
Note:
The actually required power supply depends strongly on the call traffic, the wire diameter and the line
length to the connected terminals. The values in the following table are average values under the
following assumption:
• Phones traffic volume: Call Connection 38%, Ringing 2%
• SB-4+ radio unit: Active call connection on 2 channels
• SB-8 radio unit: Active call connection on 4 channels
• Background lighting MiVoice 5380: 30% active
• LEDs on terminals and expansion key modules: 20% active
• Wire diameter: 0.5 mm
• Line length: 200 m
The table below shows the average power requirements of the terminals for a line length of approx. 200 m
and a wire diameter of 0.5 mm.
Release 7.1
81 System Manual for Mitel SMB Controller
To Next Page
Loading...
Need help?
General
