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Decrease TX power
In order to motivate clients to connect to the closest controlled access point (CAP), it is advised to decrease TX power. This will encourage wireless clients (phones, laptops, etc.) to connect to the closest CAP with the strongest signal. This can result in better wireless performance. It is possible to change TX power for Channel configuration, Configuration profile or for CAP Interface.
Do one of following:
/caps-man channel set 0 tx-power=10
/caps-man configuration set 0 channel.tx-power=10
/caps-man interface set 0 channel.tx-power=10