It's so bad that our office will not deploy, sell or advise use of extenders. We deploy Wireless Access Points or WAPs for short.
Some home owners don't get this and try extenders with hit and miss results. If you ran a shop, you would have folk upset you deployed, sold or advised such a thing.
As to the router must be outside the rack, I might agree if the router has the WiFi antennas in it.
Since I don't advise use of extenders for this and other reasons I can't answer your question.
My answer is to redesign with WAPs instead. Even Powerline APs are available today.
The communication network at home contains the following boxes provided and installed by the cable provider:
1. The main modem-router-moca adapter connected to the "outside" world. it is located within the build in communication rack on the first floor.
2. Extender 1 (TV box - router - moca adapter all in one box), located next to the TV, about 6 meter from the rack. This is simply the other corner of the living room.
3. Extender 2 (TV box - router - moca adapter all in one box), in the bedroom on the second floor.
There are severe problems with the wifi coverage.
On the first floor the problems are less severe. You can just walk around, and the wifi reception is changing dramatically, although you always around 3-4 meter from both routers (main and/or extender 1). This is not a huge place, and there are no walls or anything that will block the signal.
On the second floor it is much worse, and it is almost impossible to connect the wifi. reception is simply very poor.
I found out, that when the rack door is open, the reception is much better, yet not 100% as expected.
The cable provider, claims that the main router has to be outside the rack.
This doesn't make sense to me.
Each of the two extenders is enough to cover both floors. one in each floor.
I used two wifi analyzers apps, to try understand whats going on.
Fing & wifi analyzer. See the attached image.
you can see that both extenders are on the air (right image). however it looks like the phone is only connected to the main router, even when the connection is poor (middle image)
my questions are:
1. Is it wrong to think that case the phone is connected to one of the two routers, beside the main one, Fing will show it?
2. In case the problem is indeed the fact the phone is not connected to the extenders. what might cause it?