Mitel SMB Controller User Manual

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C
ABLING INTERFACES
CHAPTER 4 INSTALLATION
Figure 4.33: Power available case B on the DSI-AD2 bus
NOTE:
• If another system phone is operated on the DSI-AD2 bus in addition to an MiVoice 5361, MiVoice
5370 or MiVoice 5380, at least one phone must be powered by a local power supply unit.
• An MiVoice 5370 or MiVoice 5380 with an MiVoice M535 expansion key module always requires a
power supply unit.
• An MiVoice 5380 with 3 MiVoice M530 expansion key modules always requires a power supply unit.
With 2 expansion key modules the use of power supply unit depends on the line length and the line
cross-section.
Automatic detection of critical power supply situations
Only MiVoice 5360:
When a system phone (or a second such phone) is connected to the DSI bus, the maximum power input
is automatically determined; all the system phones (incl. expansion key module and alphanumerical
keyboard) connected to the interface are taken into account. The maximum power available is also deter-
mined based on the calculated line length (assumption: Diameter = 0.5 mm). If the calculated power avail-
able is below the maximum possible power input of the connected system phones, the message Power
supply critical xy m is generated on the phones connected last (accuracy approx.150 m).
System phones MiVoice 5361, MiVoice 5370, and MiVoice 5380 only:

Mitel SMB Controller Specifications

General

Brand	Mitel
Model	SMB Controller
Category	Controller
Language	English