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What if the phone shows a full signal but cannot make a call?

What if the phone shows a full signal but cannot make a call?
Update Time:2019-05-13

A. Check if the upstreampower of the amplifier is normal, or the signal of the outdoor antenna is tooweak.

B. First determine themobile phone signal at the outdoor antenna and reach (-50DBM) full grid.

C. Make sure that thedistance between the indoor antenna and the outdoor antenna is more than 10 meters.It is best to isolate the indoor and outdoor antennas from the wall. If not,please change the position of the outdoor antenna so that it is kept at adistance of more than 20 meters from the indoor antenna. The best solution isto use floor isolation. For example the indoor antenna and amplifier installedon the first floor, then the outdoor antenna must be installed on the otherfloor, preferably across two floors, mounted on the second floor, third flooror above.

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