Cisco AP 1252 Antennas 2.4GHz

Can somebody tell me if this Acess Point, AIR-LAP1252AG-E-K9, work only with one antenna of 2.4GHz? Because in the configuration tool we are obligated to choose three but i only need one. Do i have to buy the three or can i buy one spare?

If you are looking for an ap with a single antenna, then you should look at the AIR-AP1242-G-A-K9. This ap only has a 2.4GHz radio in which you can turn off diversity and choose which antenna port you will use. Purchase the 1252 if you will buy 3 antennas per radio.... or it is sort of a waste.... in my opinion.

Similar Messages

Stupid question regarding 1252 & antennas...

I'm deploying some 1252 AP's for outdoor use. The actual radios will be inside, but I plan to use AIR-ANT2506 omnidirectional antennas mounted outside for 2.4GHz coverage. I'm assuming that I'm only supposed to use one omni antenna per radio - is that correct? Or can I mount one omni on the outside NE corner of the building and another omni on the SW corner of the building and have them on the same 1252 radio?
I wasn't sure how the multiple antenna connections worked with omni antennas.
-Nick

You need to connect one AIR-ANT2506 to each of the three connectors on the 2.4Ghz radio. These three antennas should be mounted as on this picture: https://supportforums.cisco.com/servlet/JiveServlet/download/1315959-35656/DSC02825.JPG
Minimum distance between left and right antennas should be around 5" and maximum should be around 20". The middle antenna should be in the middle.
That picture has both 2.4ghz (bottom three) and 5ghz (top three) antennas, but you would only have the bottom three if you only need 2.4ghz.
Since you have 1252 (both 2.4ghz and 5ghz radios), you should probably get six antennas as on the picture. For the 5ghz, you should get three antennas that are graded for 5ghz radio.
And no, you can't just put those antennas in different areas to "increase" coverage, all three antennas are meant for a single coverage cell.

Cisco Aironet 1252 AP Poor range

Hi,
I have 6 no. 1252 access point installed in my college on different 6 floor they are configured different channels on respective AP and i have enabled 2.4 and 5 Ghz wireless setings with 5Ghz antena. but still i m not getting full range in fornt of access point distance near by 2-3 meters its showing half range in my laptop wi-fi adapter. below is the access point configuration detail.
First-Floor#show configuration
Using 2107 out of 32768 bytes
version 12.4
no service pad
service timestamps debug datetime msec
service timestamps log datetime msec
service password-encryption
hostname First-Floor
aaa new-model
aaa authentication login default local
aaa authorization exec default local
aaa session-id common
dot11 ssid MITSOM
authentication open
guest-mode
power inline negotiation prestandard source
username isource privilege 15 secret 5 $1$wSSH$mAOV0jfC3ozp/6XGbm9E40
username mitsom privilege 15 secret 5 $1$0AC.$51TLWg1ffjKd/NeJXDn3o1
bridge irb
interface Dot11Radio0
no ip address
no ip route-cache
encryption key 1 size 40bit 7 87C03667BEB5 transmit-key
encryption mode wep mandatory
ssid MITSOM
speed basic-1.0 2.0 5.5 11.0 6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2.
m3. m4. m5. m6. m7. m8. m9. m10. m11. m12. m13. m14. m15.
channel 2412
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
interface Dot11Radio1
no ip address
no ip route-cache
encryption key 1 size 40bit 7 318B1C92A4DC transmit-key
encryption mode wep mandatory
ssid MITSOM
no dfs band block
speed basic-6.0 9.0 12.0 18.0 24.0 36.0 48.0 54.0 m0. m1. m2. m3. m4. m5. m6.
m7. m8. m9. m10. m11. m12. m13. m14. m15.
channel dfs
station-role root
bridge-group 1
bridge-group 1 subscriber-loop-control
bridge-group 1 block-unknown-source
no bridge-group 1 source-learning
no bridge-group 1 unicast-flooding
bridge-group 1 spanning-disabled
interface GigabitEthernet0
no ip address
no ip route-cache
duplex auto
speed auto
bridge-group 1
no bridge-group 1 source-learning
bridge-group 1 spanning-disabled
interface BVI1
ip address 10.1.55.11 255.255.255.0
no ip route-cache
ip default-gateway 10.1.55.254
ip http server
ip http authentication aaa
no ip http secure-server
ip http help-path http://www.cisco.com/warp/public/779/smbiz/prodconfig/help/eag
bridge 1 route ip
line con 0
line vty 0 4
end

1) I am using 5 Ghz antennas.
What model of antennas are these and how many have you installed on a 1252? What about the 2.4 Ghz? Are the 5.0 Ghz antennas installed on the 5.0 Ghz radio?
I have installed access point in corridor and antenna direction towards the wall. Depending on what antennas you've installed, it's advisable to mount the AP with the Cisco logo pointing to the client.

Aironet 1252 Antenna quantity

Hi There,
I already have an Aironet 1252 and I am going to increase the coverage.
I would like to buy "AIR-ANT24120" but I dont know if I have to buy 3 of them or only would be enough?

Let me try to answer your questions:)
Did you decide to use lmr600 for longer cables and lmr400 for shorter? I could just use lmr600 for all, I think. Of course, as long as the holes in the wall allow for six lmr600's to fit in.
The cost between the two is huge, so when I was 75' or less, I would use the lmr400, anything else would be the lmr600.
Not familiar with what it takes to crimp on RP-TNC vs. N-type connector. Is N-type easier to crimp on? Or is there another reason?
If you can have the cabler's only have to deal with one type of crimp.... the easier the install and that is why we did that. Sparco arrestors were 'N" type and then we used a small jumper from the top of the NEMA enclosure to the AP which of course was rp-tnc.
I just noticed that omni antenna has SMA connector, but it also says "connector options available". I'll talk to them, hopefully they have an N-connector option. Otherwise, not sure about crimping SMA connector.
They offer other connector types.
Duly noted on the tilt and arrestors. I want to protect the AP. I don't think I'll be using enclosures inside, the AP might just be mounted on the wall. In this case. If my LMR has N-type on both ends. I would have to attach RP-TNC arrestor directly to the AP (I'm using 3500e), then attach a RP-TNC to N-type adapter, and then connect the N-type LMR. Or I might just end up using enclosures as in your example with N-type arrestor.
They have small jumpers so you can go from 'N' type to RP-TNC. We used a NEMA enclosure just so it is more clean. the arrestors actually just screwed into the top of the NEMA enclosure, 3 toward the fron and 3 toward the back and the console and ethernet connection on the bottom.

What are the Cisco 1300 series Antenna Alignment options?

I am wondering if there are any options for aligning the antennas other than RSSI LED indications. The cisco aironet is going to be on top of a 10m tower and the lights will not be visible. Is there any way to configure them to an audible output that would increase in loudness or pitch when the signal was strongest?

Check this:-
"Best Practices" for positioning Access Points (AP's) and Antennas
https://supportforums.cisco.com/docs/DOC-16627
thanks,
Vinay

Cisco 1250 dipole antenna spacing

When using dipole antennas such as AIR-ANT 4941 with the 2.4 Ghz 1250 AP, must the antennas be spaced EXACTLY as far apart as the antenna connectors on the AP, or can the dipoles be spread further out, say to 4" spacing
thank you
Scott

Let's talk a bit about Cisco diversity..
When a conventional Access Point such as an AP-1240 is in operation, it starts off favoring the right (primary) antenna, this is the antenna the Access Point typically uses to communicate to the 802.11a or b/g client. When the client starts to get out of range and retries result, the Access Point then samples the secondary antenna and if the signal is better it will use same. A client out in the very fringe area could benefit by as much as a 3 dB gain in certain null or problematic fringe areas.
Lets talk about how the 1250 Diversity works...
With an 802.11n Access Point such as the AP-1250 (unlike the older conventional Access Point) each antenna has a dedicated radio so there is no delay when it comes to switching antennas (to determine which one is the best). An added benefit when the signals are OFDM (as is with 802.11g and 802.11a clients) the Access Point can hear the signal on all antennas at the same time and then correlate or compare them all at the same time to enhance readability (that's essentially what MRC does). This has the benefit of hearing the signal much better in noisy or bad multi-path environments where a single antenna (receiver) would be problematic.
To put it into more simple terms... Think of a conventional (non-802.11n) AP much like an old fashioned television with "rabbit ear" antennas... when you are watching and the picture is not so good you can see "ghosts" images slightly off from the image that you are viewing. To fix that "multi-path" problem that is caused by the TV signal reflecting off of objects, you physically move the rabbit ear type antenna so as to minimize reflections. The Access Point basically does the same thing but rather then physically moving the antenna (like in the case of the TV) it electrically moves the antenna by switching to the other antenna on the Access Point.
Now with 802.11n (instead of this electrical switching of the antenna) think of several antennas with a method that dynamically "puts" all of these antennas together (without having to choose just one) for best performance. This is why all clients including older 802.11a/g clients benefit from this method.
So when it comes to antenna placement, you can look at multiples of a given wavelength but it's not nearly as critical as you might think. Basically you don't want the antennas so far apart that they cover different cell sizes - and they could (but shouldn't be) any closer then they are on the AP-1250 AP which is approximately 2 & 3/4 inches.
If you put them much closer then that, you run the risk that the Dipole elements will play off each other and perhaps take on additional directional properties.
Fred Niehaus N8CPI
TME Cisco WNBU.

Configuring Cisco AP 1252 as a Univeral WGB

HI
I wanted to know if someone can help me with get this configured right, the problem that i'm having is a have users who need to get access to the internet but they are in a trailer out side the building. I was told to configure 2 AP's, one as a standard AP and the other as a Universal WGB. Below is how i have the devices configured.
Inside the building i have 3560-E with port gi0/6 configured as a trunk to support the AP, outside in the trailer i have a 3750 with port fa1/0/1 configured as a trunk to support the WGB. I was told by another engineer that all i had to do is configure the one that i want as the WGB and make sure they are in line of site and it should work. So i did just that and i plugged my laptop up into port 4 on the 3750 and i don't get anything.I wanted to know can this model AP be used as a WGB because i've seen things that say you shouldn't do it. And if you can use them can you tell me how to configure the one that's the Universal WGB to give out IP address to my wired PC's in the trailer.Thanks in advance and look forward to your reply

Is this what you are looking for?
Wireless Bridges Point-to-Point Link Configuration Example
http://www.cisco.com/en/US/tech/tk722/tk809/technologies_configuration_example09186a008058f53e.shtml

Looking for Cisco-Linksys WRT330N antenna.

Im looking for the directional antenna from that router, also i would like to know what is the gain on those.
Please reply with any information

Antenna of the WRT330N is not detachable.

Antenna alignmenet on Aironet 1252

Hi,
I am using two Cisco Aironet 1252 (cisco AIR-AP1252AG-A-K9) to setup a point to point link (one is configured as root bridge and is as a non-root bridge). Both Aironets are running software version Version 12.4(25d)JA.
Is there a way that I can that I can perform an antenna alignment test on the Aironet that is configured as a non-root bridge?
note: executing the following command dot11 dot11radio 0 ? does not show the antenna-alignemnet option.
Regards,
Screech

.Now I am having problem having the devices associated . Is there any other way of testing why the devices are having problem associating to each other. Note in the root bridge I get an event that the root has reached the maximum packet retry send to the non-root bridge.
Any idea.
Tnx,
Screech

Outdoor 2.4GHz Antenna Ingress Protection Ratings

Hello,
I have not been able to find any documents that state the Ingress Protection Rating for Cisco's outdoor antennas, such as the AIR-ANT2506. Does anyone have current information on this?
I'll put a request to Cisco pre-sales, and IF i get a response ill post it in here as well (though very unlikely)
Thanks
Blake

We would not know that info without Cisco posting that, but these antennas have a small drain hole to allow for moisture and water to be released if that helps. I would not use a high pressure jet spray on these as it might break.
Sent from Cisco Technical Support iPhone App

Cisco AP 1252AG Cannot setup More than 54Mb/s speed in radio 0 (2.4G)

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I have a problem when I configure CISCO AP 1252, it cannot support more than 54Mb/s speed but support 802.n which speed can up to 300Mb/s. See below :
here is dot11radio 0 speed option: (The MAX speed is 54Mb/s by manually, how can i setup more than 54Mb/s, because of this AP support 802.n. So the speed should be more than 54M/s, like 300M)
AP#sho inter dot11Radio 0
Dot11Radio0 is up, line protocol is up
   Hardware is 802.11N 2.4Ghz Radio, address is *************
   MTU 1500 bytes, BW 54000 Kbit, DLY 1000 usec,
AP(config)#inter dot11Radio 0
AP(config-if)#speed ?
   1.0         Allow 1.0 Mb/s rate
   11.0        Allow 11.0 Mb/s rate
   12.0        Allow 12.0 Mb/s rate
   18.0        Allow 18.0 Mb/s rate
   2.0         Allow 2.0 Mb/s rate
   24.0        Allow 24.0 Mb/s rate
   36.0        Allow 36.0 Mb/s rate
   48.0        Allow 48.0 Mb/s rate
   5.5         Allow 5.5 Mb/s rate
   54.0        Allow 54.0 Mb/s rate
***(why here without more than 54M/s rate, CISCO AP 1252 support IEEE802/n)
   6.0         Allow 6.0 Mb/s rate
   9.0         Allow 9.0 Mb/s rate
   basic-1.0   Require 1.0 Mb/s rate
   basic-11.0 Require 11.0 Mb/s rate
   basic-12.0 Require 12.0 Mb/s rate
   basic-18.0 Require 18.0 Mb/s rate
   basic-2.0   Require 2.0 Mb/s rate
   basic-24.0 Require 24.0 Mb/s rate
   basic-36.0 Require 36.0 Mb/s rate
   basic-48.0 Require 48.0 Mb/s rate
   basic-5.5   Require 5.5 Mb/s rate
   basic-54.0 Require 54.0 Mb/s rate
***(why here without over than 54Mb/s Rate?, it support IEEE802.n)
   basic-6.0   Require 6.0 Mb/s rate
   basic-9.0   Require 9.0 Mb/s rate
   default     Set default rates
   m0-7        Allow MCS rate indices 0-7
   m0.         Allow MCS rate index 0
   m1.         Allow MCS rate index 1
   m10.        Allow MCS rate index 10
   m11.        Allow MCS rate index 11
   m12.        Allow MCS rate index 12
   m13.        Allow MCS rate index 13
   m14.        Allow MCS rate index 14
   m15.        Allow MCS rate index 15
   m2.         Allow MCS rate index 2
   m3.         Allow MCS rate index 3
   m4.         Allow MCS rate index 4
   m5.         Allow MCS rate index 5
   m6.         Allow MCS rate index 6
   m7.         Allow MCS rate index 7
   m8-15       Allow MCS rate indices 8-15
   m8.         Allow MCS rate index 8
   m9.         Allow MCS rate index 9
   ofdm        How to place OFDM rates in rates elements
   only-ofdm   Set rates for best OFDM throughput (no ERP protection will be used)
   range       Set rates for best range
   throughput Set rates for best throughput (includes non-OFDM rates and may cause ERP
Why this device cannot support 300Mb/s rate in radio 0 of speed ?
i want to setup more than 54 Mb/s when i use my laptop to connect this AP.

The 802.11n HT rates apply only to no encryption or WPA2/AES encryption. They do not apply to WEP or WPA encryption. If WEP or TKIP encryption is used, the 1250 series access points and any 802.11n Draft 2.0 clients will not transmit at the HT rates. Legacy rates (802.11a/b/g) will be used for any clients using WEP or TKIP encryption.
Ref.: Release Notes
40MHz Operation
If the throughput you get from a 20-MHz channel isn't enough for your speedy users, you can flip each 5-GHz 11n radio into a bonded-channel configuration.
You can configure 40-MHz operation on the 2.4-GHz radio of the 1250 Series AP, but this isn't recommended or supported. The primary reason against it is that with a wide channel in a band that has so little available spectrum (and so much interference), you make a single AP capable of higher throughput at the expense of performance for all neighboring access points-certainly not the way enterprise WLANs ought to be designed. Also, the vast majority of client chipsets (Intel's, for one) will not support 40-MHz operation in the 2.4-GHz space.
Ref.: Cisco 802.11n Design and Deployment Guidelines
Making the Most of Things
Once you're connected at 802.11n HT rates, you'll want to make sure you don't lose the throughput gains you should be able to achieve. Not all may be within your control, but if you understand the performance implications of these variables, it will help you in baselining your WLAN capabilities.
When your laptops are unplugged, the 11n client will likely try aggressively to save battery power. Depending on client radio and chipset, it's not uncommon to see performance drop by as much as 50 percent. Unless you know how to fully disable this, keep your laptops plugged in if you want maximum performance,
Note: Even if you managed to disable this power save function, most laptop motherboards/chipsets have automated power-saving features that kick in when the laptop is unplugged. At best, these are difficult to disable. Thus, it is strongly recommended that you not do performance testing when clients are battery operated.
As detailed previously, throughput performance may vary as legacy devices are introduced into the 802.11n environment. This is to be expected, but make sure that you find a channel void of all legacy transmissions if you want to test the high-water mark of your new 11n WLAN. If that isn't possible, adjust your expectations accordingly.
Ref.: Cisco 802.11n Design and Deployment Guidelines
Regards,
André

External Antenna Mount for AIR-ANT5160NP-R

I about to embark on a project to create a wireless bridge using a pair of Cisco Aironet 1252's, which will be mounted internally, and a pair of Cisco Aironet 5-GHz MIMO 6-dBi Patch Antenna (AIR-ANT5160NP-R), which will be mounted externally.
Could anyone suggest the best way to mount the antenna? Both will be mounted to steel upper wall of the building (its brick below this). I couldn't find any specific mounting kits.

My bad on the metal wall mounting, it was late and I was tired.
Now that I have slept some here is what I am thinking. Why use the MIMO patch antenna? On such a short link you can use an omni stick. Then mount this to a wall mount antenna bracket such as this - http://www.google.com/products/catalog?q=wall+mount+antenna+brackets&oe=utf-8&rls=org.mozilla:en-US:official&client=firefox-a&um=1&ie=UTF-8&cid=6140961992914474386&ei=NCXlTKHiIYKglAfVw6XjCw&sa=X&oi=product_catalog_result&ct=result&resnum=1&ved=0CC8Q8wIwAA#
You would only need one bracket for each location and can secure the bracket to the metal wall with either large self tapping screws or using butterfly bolts.
If you are worried about your signal propogation then make sure your link is encrypted with AES and that your power is at minimum to establish the 54M link.
I would use the AIR-ANT5160V-R antenna.

Cisco aironet RM1252 11g webinterface

i am having one cisco aironet 1252 11g accespoint.when connecting to dhcp is getting an ip,but i am not able to open it through webinterface .also i tried console (using putty),but unable to go to configuration mode.
please help what will be the problem..

Hii
I am assuming that is Autonomous AP. Try enabling HTTP on the AP by using command
ip http server in global config
Give it a try ..
vinay

Aironet 1252 bridge and 802.11n

Hi,
I have two Cisco Aironet 1252 that I want to configure as a point-2-point bridge. Now I want to know if this configuration supports the 802.11n protocol.
Regards,
Screech

Scott,
I found the following statemen in the release note of IOS 12.4 (25d) (http://www.cisco.com/en/US/docs/wireless/access_point/ios/release/notes/12_4_25d._JArn.html#wp291685)
802.11n HT Rates Apply Only to No Encryption or WPA2/AES Encryption
The 802.11n HT rates apply only to no encryption or WPA2/AES encryption. They do not apply to WEP or WPA encryption. If WEP or TKIP encryption is used, the 1250 series access points and any 802.11n Draft 2.0 clients will not transmit at the HT rates. Legacy rates (802.11a/b/g) will be used for any clients using WEP or TKIP encryption
Given this statement how do I configure AES encryption on the aironets 1252 that are configured in bridge mode as I do not see this option. If possible please provide steps using the web interface.
Regards,
Screech

Antenna Selection for High ceiling (Warehouse)

i read nearly 500 topic on antenna selection for high ceiling and industrial warehouse environments (~10m ceiling)
Question1 : both ant2544v4 and Ant2524 has ~60 degrees Elevation plane 3 dB beamwidth does it mean this Omni antenna could be mounted on 10m height without coverage issue ?
Question2:suppose installing plenty of 2702 with Ant2524 or Ant2544V4 in close adjacency , does CleanAir2 helps to avoid interference ?
Question3:if i want avoid directional antennas to cover aisles using dipoles is the last solution ? (if omni antenna cant afford enough elevation due to its nature )
my warehouse area is something like this : http://www.pathguide.com/Images/Content/warehouse%20aisle.jpg
thanks

As I can see this location presents challenging RF conditions: high attenuations, reflections, multipath, etc. The fact that you need to implement Voice WLAN too, introduces more difficulties.
You have to conduct a wireless site survey. I don't know how much experience do you have with this activity or if you have the equipment and site survey tools required, but it has to be done.
In the worst case scenario you have to grab at least one or two APs from the model that you intend to install, set them up in stand alone mode with some test SSIDs and install them in the warehouse in different locations. Than you walk arround and try to measure the signal quality and attenuations. You cand use some free or trial site survey applications that can be found on the Internet.
You have to find out what protocol (802.11 a/b/g/n) the barcode scanners are using and what TX power are they capable of. You should set up your APs accordingly (the AP TX power should not exceed the client power, preferably it should be about half in order to benefit of CHD). The same has to be done for the Voice clients. The survey has to be done separately for each 802.11 protocol. I recommend taht you do some futher reading on the subject.
As for the antenna type, Cisco recommends directional antennas in high ceiling environments. However, I have installed 2702e APs with standard omni antennas in warehouses and they did the job very well. The difference in my case was that I installed the APs on cable channels at ~6-7 meters, not directly on the ceiling. Maybe you can find some other mounting possibilities besides the ceiling if you want to stick to omni antennas.
The co-channel interference between adjacent APs is avoided usualy by DCA and TPC not as much by CleanAir. However in 2.4 GHz there could be some interferences.
As a conclution you have to use some real APs in order to estimate, with at least a minimal accuracy, the position and number of required APs for the deployment. Do not forget about the cabling requirements for the APs, distances to the closest switch, electrical power etc.

Cisco AP 1252 Antennas 2.4GHz

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