Installation
• Only ever use the supplied power supply unit.
Figure 15: Powering the communication server from the mains
4.3.2 Uninterruptible power supply (UPS)
The use of an external uninterruptible power supply (UPS) guarantees operation even in the event of a
mains outage.
The UPS battery capacity is rated according to the communication server’s primary power requirements
and the required bridging time. The table below shows the maximum power requirements of the
communication server in its maximum configuration and maximum traffic volume.
Table 29: Maximum power requirements of the communication server
Communication server Maximum power requirements
Mitel SMBC 150 VA
The battery capacity required [Ah] can be calculated using the battery voltage and the maximum bridging
time. It is important to note that the battery must never be allowed to become completely discharged and
that in typical conditions only approx. 60% of the maximum power requirements is needed.
Note:
The uninterrupted operation of the communication server is ensured if the UPS takes over the power
supply within 20ms of the mains outage.
See also
Release 7.1
95 System Manual for Mitel SMB Controller