Just purchased 2 AIR-LAP-1252AG-A-KP APS. I notice it has external Antenna Connectors. I have loked in the Doc but can;t find the info I am looking for. I want to use them inside a gym and was wondering if they will work without external antennas.
Antenna Product Portfolio for Cisco Aironet 1250 Series Access Points
Avoid running the AP's without any antennaes or you might permanently damage the transceiver.
Hope this helps.
The 1252 does not have "built-in" Antenna/Antennas options, so external Antennas are required;
Supported Antennas are listed in this doc;
Have a look at this good thread which includes some good insight on Antenna options, from Dennis, who is very knowledgable about 11n;
Hope this helps!