88
P
OWER SUPPLY CAPACITY
CHAPTER 3 EXPANSION STAGES AND SYSTEM CAPACITY
TIP: With the planning application Mitel CPQ the power supply available for terminals is checked auto-
matically.
Power supply per terminal interface
The power supply per terminal interface is determined by the interface type. The interface load depends
on the following variables:
• Terminals used incl. auxiliary devices
• Bus configuration
• Line length and conductor cross-section
For information on the calculations refer to Terminal interfaces.
Expansion key module MiVoice
M535
MiVoice 5370, MiVoice 5380
0
2
Radio unit without power supply
unit SB-4+
DSI-AD2 interface
1500
3
Radio unit without power supply
unit SB-8
2 DSI-AD2 interfaces
1350
4
Radio unit with power supply unit
SB-4+/SB-8
1 or 2 DSI-AD2 interfaces lt; 100
ISDN terminal BRI-S interface
approx. 500
5
Analogue terminals FXS interface approx. 500
1. Although no longer available, the phone is still supported.
2. An MiVoice M535 always requires a power supply unit
3. The value applies to radio units with hardware version "-2". The value for hardware version “-1” is 300 mW lower.
4. The value applies to each interface and to radio units with hardware version “-2”. The value per interface for radio units
with hardware version “-1” is 150 mW lower.
5. The value depends greatly on the terminal type.
Table 3.20:Average power requirements of terminals (Continued) (Sheet 2 of 2)
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