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32/1531-ANF 901 43 Uen B2 2016-04-01
Installation Guide
Base Station
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Figure 14. Mounting of the IPBS
3.3 POWER THE BASE STATION
The base station is powered the following ways:
•
Power over Ethernet (only IPBS).
•
Power over Express Powering Pairs (EPP) and data pairs (only BS3x0 and BS3x2)
•
By a local power supply.
NOTE: Do not power the base station using both power supplies. Parallel powering will
not harm the base station but it can disturb the signalling.
3.3.1 POWER THE IPBS OVER ETHERNET
The IPBS supports Power over Ethernet, IEEE 802.3af, class 2. The power source will
allocate 7W to the IPBS. This must be regarded when planning the powering of the
IPBSs so that the power limit of the PoE power source is not exceeded.
The PoE standard supports two ways of feeding the power:
1
Power over the Rx/Tx data pairs.
2
Power over the spare cable pairs.
Both power feed methods are supported in the IPBS, it is also insensitive to change of
the polarity.
3.3.2 POWER THE BS3X0 AND BS3X2 OVER EXPRESS POWERING
PAIR (EPP) AND DATA PAIRS
When a base station is powered remotely via the PBX, the maximum length between
the base station and the PBX depends on the supply voltage, the number of twisted
pairs used and the wire size. The length of the cable should never exceed "data-
limited" length of the cable, see
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