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New Member

Weak wifi signal - 1550, 1262 APs

Hi,

deploying 1550 and 1262 APs indoor and outdoor but getting weak signal from both.

We are deploying 1550 and 1262 APs in 2 countries with ETSI regulations (so ETSI APs). APs are connected to WLC (5508, v7.2) and we configured static TXPower (802.11b/g) and set value to 1 (highest). We played with antenna gain values (from default 0 to the correct value of antenna gain).

The signal level from both AP types is very low. This is very disapointing for 1550 APs - we have a coverage radius of 20-30 meters. This is of course unacceptable because of the cost of APs, the size and because of competition products.

Am I missing some configuration in WLC? Is there any way to improve distance??

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19 REPLIES
Bronze

Weak wifi signal - 1550, 1262 APs

I assume that the 1262 was used for indoor and 1550 was used outdoor?

20 - 30 metres radius doesn't seem bad for an indoor coverage depending on type of obstacle. This equates to a diameter of 40 - 60 metres, and the diametre of 11Mbps circle is 60m (200 feet) approximately.

What is the structure of your indoor environment including obstacle type.

What model of 1550 did you deploy? External antenna or Integrated antenna

Is the coverage radius reported only for the indoor or both outdoor and indoor?

I would suggest that for indoor AP (1262), leave the TX power as default i.e determined by the WLC and see if it reduces the power automatically. If this happens, then there might be an interference issue.

Hall of Fame Super Gold

Weak wifi signal - 1550, 1262 APs

The signal level from both AP types is very low. This is very disapointing for 1550 APs - we have a coverage radius of 20-30 meters. This is of course unacceptable because of the cost of APs, the size and because of competition products.

How HIGH from the ground are the WAPs installed?  What kind of antennas are used in the 1260?  What direction are the antennas pointing to?  What direction is the "Cisco" logo pointing?  Describe the areas where the WAPs are installed?

When you say bad signal, from what radio?  Both?  What data rates are disabled on the WLC?

New Member

Weak wifi signal - 1550, 1262 APs

Hi,

The 1550 is my main problem now. According to Cisco the 802.11g cell or range should be 180m

(ETSI version). However I already deployed several of 1550s and the range is not even near that number, more like 50-60 in best case.

1550 currently support only a single antenna type (omnidirectional) so one cannot fail on poor antenna selection.

The height on which 1550s are installed is 4-10 meters depending on location. Signal is bad for the 2.4GHz radio (5 Ghz even worse because of higher freq).

When I say signal is bad i mean that RSSI values on client devices (PC, MAC, phone, tablet) are poor (-70dbm and worse) already 30 meters away from the radio.

First all data rates were enabled and then i disabled the lower ones up to 11mbps. I played with the rates but it doesnt seem to have a significant impact (although it should)

The antenna gain settings for access points in WLC were first set to match actual gain of the installed antenna but then i put a value of 1 hoping WLC will increase the power (EIRP = tx + gain - cable loss).

---

Regarding installation of 1262, it is always installed on ceiling (below the ceiling), the height is 3-4 meters, antennas and cisco logo are facing down. Actually 1262 with omni could be also positioned on side walls with almost similar signal quality but we are not doing it.

Hall of Fame Super Gold

Weak wifi signal - 1550, 1262 APs

1550 currently support only a single antenna type (omnidirectional) so one cannot fail on poor antenna selection.

Please specify the model number of the antenna.

New Member

Weak wifi signal - 1550, 1262 APs

Antenna product nr. is AIR-ANT2547V-N. The AP is AIR-LAP1552E

Hall of Fame Super Gold

Weak wifi signal - 1550, 1262 APs

Something is not right here.

Your antenna is correct model but ALL of you wireless signal is weak?

I would understand if one or two of the WAPs have low signal strength but ALL?  

New Member

Weak wifi signal - 1550, 1262 APs

Hi Dario,

  I am also experiencing the same problem , very poor range for the 1552 in full power. around 50mts max at -70dbm. Did you find a solution for this  ? Please let me know

regards

Joe

Hall of Fame Super Silver

Re: Weak wifi signal - 1550, 1262 APs

50 mts around -70 isn't bad. I'm guessing its an open area and line of sight?

Sent from Cisco Technical Support iPhone App

-Scott
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New Member

Weak wifi signal - 1550, 1262 APs

Hi Scott,

But the 1552 range calculator says 190mts for LOS !! so at least half of that should be achieved in open space ? and non-LOS claim as per range calculator is 100 mts

regards

Joe

Hall of Fame Super Silver

Re: Weak wifi signal - 1550, 1262 APs

That's for mesh to mesh not mesh to client.

Sent from Cisco Technical Support iPhone App

-Scott
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New Member

Weak wifi signal - 1550, 1262 APs

Nope, its for client access. Please check the range calculator, there is a tab for client access and input your device type and you get those values. 

www.cisco.com/en/US/.../1520_Link_Calculator.xls

regards

Joe

New Member

Weak wifi signal - 1550, 1262 APs

Sorry, wrong link :

www.cisco.com/.../range/calculator/1552_Link_Calculator


..

Hall of Fame Super Silver

Re: Weak wifi signal - 1550, 1262 APs

Well I wouldn't of used that for exact measurements anyways. When we have deployed mesh, an outdoor mesh survey was required in order to provide the coverage the client expected.

Sent from Cisco Technical Support iPhone App

-Scott
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New Member

hi Dario,

hi Dario,

  Did you find a solution for this ? Please let me know. Cisco outdoor AP's even the new 1572 range is pathetic in the -E regulatory domain. 

regards

Joe

This article is scaring me, I

This article is scaring me, I am busy with a mesh project with 1552E's in the -E regulatory domain.. I have not done a full site survey yet but from what I have seen so far is that these AP's are just rubbish... We are running an easy 400-500m between Ubiquiti bridges at the moment, I know for a fact I wont match that with the 1552E's but hopefully I wont need a lot more access points just to cover this distance.. More than 10x the price of the Ubiquitis and it cant even pretend to keep up in distance... very dissapointed in cisco

Hall of Fame Super Silver

Well, I've never been a fan

Well, I've never been a fan of their bridging units... MESH to me is really for client access and not point to point bridging.  If I were to do PTP, then I would spend the money on Bridgewave, Proxim or even the Exalt bridges.  I have customers whom just buy the Ubiquitis and keep spares if they ever die, for the cost you can't beat that.  If I were to use the 1552's fro bridging, then you better look at using the 5ghz with patches and the 2.4ghz for client access if needed. 

-Scott

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-Scott
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New Member

Weak wifi signal - 1550, 1262 APs

Hi Dario,

Did you ever find the solution to this problem?

I am having the same issue and i dont know what to do.

Thanks,

laszlo

New Member

Weak wifi signal - 1550, 1262 APs

Yep, also interested if there was a solution in the end.

I'm having similar issues. I was expecting a lot wider outdoor coverage with the 1552EU...

New Member

Weak wifi signal - 1550, 1262 APs

Hi Good people,

Is there anyone who has an idea on the solution to this, as I am having the same experience difference of the 2.4GHz antenna trying to cover so the signal keeps going up and down, and yes I am less than 30 meters from 1552 AP.

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