Huawei ETS2251, User Manual

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HUAWEI
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Installation Description
External Power Adapter Installation
The FWT usually adopts the external power adapter to supply power. However,
in the event of power cut or no external power adapter, it needs spare battery to
supply power and you should make sure the spare battery have been charged full
before using.
1 Make sure the FWT is turned off.
2 Insert one end of the power adapter connection line into the FWT power jack,
which is shown as 5) in Figure 3-4, and plug the other end into the power
socket. The external power adapter installation is finished.
Spare Battery Detachment/Installation
Caution:
Before alternating battery for the FWT, you must turn off the FWT and
pull out the power adapter.
The FWT spare battery can support 5-hour conversation or stand by for 40-120
hours (reference value, the actual time is associated with the network condition)
in the case of no external power supply. Take the following procedures to
alternate or detach the spare battery.