1142N bandwidth throughput and max number of users

Im using AIR-LAP1142N-N-K9 access points (it supports b/g/n). Somestimes the AP has up to 80 users connect to it.
SOme recommends the AP should have between 25-35 users max.
Any one know the recommend maximum number of users connect to a AP? And how can you tell the traffic going through the AP is congested?
Cheers

SOme recommends the AP should have between 25-35 users max.
Cisco recommends no more than 25 authenticated users. Maybe the 80 users are both authenticated (can go to the internet) and associated (not able to).
Remember that wireless is like a hub: When one client talks, everyone stops to listen and waits for their turn.

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1142N bandwidth throughput and max number of users

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