Coverage distance for aironet with antenna

hi all,
what's the coverage distance for
Cisco Aironet 2602e Controller-based - wireless access point
with
antenna
Cisco Aironet High Gain Omnidirectional Ceiling Mount Antenna - antenna
thanks for any comment you may add.

1. You've posted this thread in the LAN/WAN section. So you won't get a lot of comments/responses.
2. What is the EXACT model of the antenna?
3. How is your antenna installed and the orientation of the clients?
4. What data rates do you have enabled?
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