topic Re: Wireless Access Points in Wireless

Wireless Access Points

Kishorekiran — Mon, 05 Jul 2021 15:32:24 GMT

Hi Team,

What is the best practice to protect the cisco Wireless Access Points from over voltage and lightnings.

Regards

Kishore

Re: Wireless Access Points

Leo Laohoo — Fri, 20 Apr 2018 08:17:48 GMT

If your AP has risk for lightning strike, then it's not worth installing it.

Re: Wireless Access Points

Kishorekiran — Fri, 20 Apr 2018 08:23:06 GMT

But we are in the customer support and we cannot deny the request. And
more over there is no specific location where the AP is getting faulty...

Re: Wireless Access Points

patoberli — Fri, 20 Apr 2018 11:38:28 GMT

First of all, indoor or outdoor?
For outdoor, there is a special flash protection kit which you have to use.
For indoor, get a UPS with included flash protection and attach your PoE+ switches to the UPS and then the APs to the PoE+ switch. That way they are protected.

Re: Wireless Access Points

Kishorekiran — Fri, 20 Apr 2018 11:46:06 GMT

Thanks for the update... all the AP's we have are outdoors.....

Re: Wireless Access Points

patoberli — Fri, 20 Apr 2018 11:50:10 GMT

In this case, have a look here:
https://www.cisco.com/c/en/us/td/docs/wireless/lightning_arrestor/installation/guide/hslar.html
You require one per antenna. So for an AP1570 you'd require 4 of those.
Also have a look at this document:
https://www.cisco.com/c/en/us/td/docs/wireless/access_point/1570/installation/guide/1570hig.html
There is one such document per model of AP.

Re: Wireless Access Points

Kishorekiran — Fri, 20 Apr 2018 11:59:34 GMT

Good Solution... but have to see if it would hold good for 2000 Ap's in customer locations....

Re: Wireless Access Points

patoberli — Fri, 20 Apr 2018 12:04:27 GMT

The lightning arrestors are actually not required (although that depends on the laws of the Country your customer lives in).
In this chapter of the document:
https://www.cisco.com/c/en/us/td/docs/wireless/access_point/1570/installation/guide/1570hig/1570_chinstallap.html
Cisco states:

The access point is designed with consideration for resistance to effects of lightning effects on the access point electronics. The access point employs lightning arrestor circuitry on the Ethernet and power ports. On the input Ethernet port, Gas Discharge Tubes (GDT) are used for the Power Entry Module (PEM) to mitigate lightning effect. On the AC power, GDTs are also used along with fuses to mitigate high-current condition. For the DC power, a fuse is used to mitigate high current condition.

While not a common practice, the user may want to consider using lightning protection at the antenna ports for added protection. To meet EN/IEC60950-22 (Clause 4.2) requirements, the installer must ensure that additional protection is provided external to this equipment to reduce transient surges from Overvoltage IV to Overvoltage Category II at the AC power input of the access point. The over-voltage and fault-current protection components used to achieve this protection must comply with the IEC 61643 series of standards. To meet CAN/CSA-C22.2 No. 60950-22-07/UL60950-22 requirements, the installer may use alternative components to provide this additional protection. Those components may comply with ANSI/IEEE C62.11, CSA Certification Notice No. 516, CSA C22.2 No. 1, or UL 1449. Suitability of the components for the application must be determined for the intended installation. (For example, some devices are suitable for installation on the load side of the service entrance only, and some are suitable for use with cord-connected equipment only.)

Re: Wireless Access Points

Kishorekiran — Fri, 20 Apr 2018 12:18:06 GMT

WOW! Give me time to go through all the documents and will come back on
the discussion.

Re: Wireless Access Points

Kishorekiran — Mon, 23 Apr 2018 05:41:10 GMT

Hi,

The below are our AP devices. Kindly check if these have the same features.

AIR-AP1542I-D-K9

AIR-AP1852I-D-K9

Regards

Kishore

Re: Wireless Access Points

patoberli — Mon, 23 Apr 2018 06:38:00 GMT

The 1850 series is an indoor model, the 1540 series is outdoor.
See here for the respective datasheets:
https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-1540-series/datasheet-c78-738585.html
https://www.cisco.com/c/en/us/products/collateral/wireless/aironet-1850-series-access-points/datasheet-c78-734256.html

Re: Wireless Access Points

sbhadrav@cisco.com — Thu, 05 Jul 2018 08:06:12 GMT

You're looking for 'Lightning Arrestor'. Something like this. Make sure you get the right one for your AP connector (N / RP-TNC) and note they aren't infallible!
https://www.cisco.com/c/en/us/td/docs/wireless/access_point/1570/installation/guide/1570hig/1570_chinstallaccs.html