04-21-2009 06:27 PM - edited 07-03-2021 05:28 PM
All,
I bought the 1250 Spare unit by mistake from CDW. I thought I got the right P/N. I came without any radio/antenna.
Which P/N do I need to get this spare to work with 2 5Ghz radio and set 2 sets of Cisco 5Ghz antenna that support 802.11n?
Is it cheaper just to try to return and get a fully configured unit?
My building is in Malibu with lots of 2.4Ghz bases. I really want to use just 5Ghz 802.11n. Most of my laptops are MacBook Pro supporting 802.11n 2x3:2 MIMO. Currently, we have 4 Cisco bases with lots of interferences in 2.4Ghz.
Thanks.
Chris
04-21-2009 06:48 PM
HI Chris,
Antenna Product Portfolio for Cisco Aironet 1250 Series Access Points
http://www.cisco.com/en/US/prod/collateral/wireless/ps7183/ps469/at_a_glance_c45-513837.pdf
Hope this helps.
04-21-2009 07:39 PM
Thanks but the Spare does not have any RP-TNC ports on top of it at all. I can't see how to connect any antennas it without new covers?
04-22-2009 03:39 AM
The part number for LWAPP: AIR-LAP1252G-A-K9
The part number for Autonomous: AIR-LAP1252G-A-K9
What you bought is just the shell and no radio's. If you want to just buy the 5ghz radio, the part number for that is: AIR-RM1252A-A-K9. Then just put that into you 1252 shell. Or you can just return it and get on with that radio.
04-22-2009 05:07 AM
If I buy 2 5Ghz radio modules and installed both inside the shell, how do I connect the external antennas?
The shell does not have any RP-TNC connectors on the tops. Will the radio modules come with new covers?
04-22-2009 05:24 AM
You cannot install two of the same radio module; you can install up to one 2.4GHz radio and up to one 5GHz radio.
The radio module has the connectors.
04-22-2009 05:44 AM
I thought Cisco sells one with two 2.4Ghz radio? We can't install 2 5Ghz units? That would be a big bummer.
04-22-2009 03:07 PM
No you can't.... either one radio or one of each.
04-22-2009 06:12 PM
You are right. The pre-installed unit comes with either 2.4Ghz and 5Ghz radios or just 2.4 Ghz radio.
However, I have the base unit without any radio modules at all. What would prevent me to install 2 of the 5Ghz modules? The 2 dummy cover are exactly the same. The slot seems to be the same. Physically, 2 5Ghz radios should fit perfectly.
The question is if anyone has tried it using PoE injector? I have both the spare base unit and PoE injector.
I have read a few posts saying it won't work with two 5Ghz radios. If so, could anyone explain why? I would like to use two 5Ghz radios with 2 Patch antennas (the one designed for the 1250) and cover a long builder (lots of 2.4Ghz bases already installed).
04-23-2009 03:43 AM
Most likely because of the code on the wlc will not detect an ap with two of the same radios. Also this is a way you have to buy two ap's instead of just one:)
04-23-2009 06:25 AM
Thanks. That makes sense.
I don't use WLC. The IOS support autonomous mode and I will only use it with IAS. It's a simple setup.
Is it because of the PoE injector may not have enough power for both? Has anyone tried using two 5Ghz radios with the 1250 spare base units?
04-23-2009 06:35 AM
LWAPP or IOS, it will not work... you might even damage the ap or radio. If you look at any autonomous code, you either have a dot11radio 0 (2.4ghz) or a dot11radio 1 (5GHz)
04-23-2009 08:15 AM
Checking. What I have is Cisco IOS Release 12.4(10b)JA1
http://cisco.com/en/US/docs/wireless/access_point/ios/release/notes/12_410b_JA1rn.html
04-23-2009 08:22 AM
Still checking.
BTW, this one can do 802.11n with dual 5Ghz! I still can't believe the 1250 can't do dual 5Ghz.
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