Aironet 1252 Antenna quantity

[majid24h]

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?

[Scott Fella]

Everything came from Sparco except for the AP's. Speak with Nathan or Chris from Sparco. All I can say if you are trying to come up with a solution is use an antenna with either 3 leads or if they have a single antenna with 6 leads for both the 2.4 and 5ghz everything was custom and basically I drew out how the antennas were going to be mounted. The client purchased 1000' lmr 400 or lmr 600 depending on the distance between the Ap and the antenna.

Hope this answers your question.

Sent from Cisco Technical Support iPhone App

[Roman Rodichev]

Thanks, Scott, that helps! I'll definitely get in touch with those guys on Monday. Thanks for the recommendation of using 6 lead omni and cutting cables ourselves. Looks like I might use this antenna: http://www.sparcotech.com/cgi-bin/commerce.cgi?preadd=action&key=SP-MIMO-OD6

Just one last question about arrestors. Do you recomend installing six per 1252, and do you directly attach them to the 1252 leads or use it inline with a second cable?

[Scott Fella]

That antenna is what I actually used in another install.  Now depending on high up the antenna will be, you will have some down tilt, but you can also angle the mount down a little to give you certain coverage below.  If you can mount these 25' you should be good with keeping them vertical.  As for lightning arrestors, I have always gone with 6 and the only reason is that the lightning arrestor was mounted on top of the NEMA case the 1252 was housed in.  So the LMR came back to the NEMA and connected to the arrestors.  If you want, you can alway put a lighting arestor on the cat5e/6 cable so that in case of a lightning strike, your AP will blow, but might protect your equipment the AP is connected to.

By the way, I had then cut the length of the cable and attach 'N' connectors so that the install would be easy for the cable guy's.  We purchased a crimp tool for both lmr 400 and 600, and all the antenna ends were replaced with 'N' type connectors.

[Scott Fella]

By the way... Depending on your order, Sparco can powder coat the mounts in most colors if that becomes an issue.  It was in my install:)

[Roman Rodichev]

Again, great info, Scott! but then of course it brings a few more 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.

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?

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.

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.

[Scott Fella]

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.

[Roman Rodichev]

Perfect, thank you!