Enterasys certifies antennas for each individual Access Point (AP) to ensure 
they stay within FCC regulations. The radio cards in the AP are tuned 
accordingly based on the model of antenna that is selected in the dropdown box 
located in the management software. Trapeze/Enterasys can only offer certified 
antennas to our customer base. If a customer chooses to use a third party 
antenna, Enterasys would not be able to support or warranty the AP if any 
issues occur. Enterasys offers other models of thin AP's that do support 
certified omni antennas.

Please review the following link to see what is available for antenna options 
per AP model.

http://secure.enterasys.com/support/manuals/hardware/Antenna_QuickRef.pdf


Doug Hyde
Escalation Support Engineer
Enterasys Networks

Phone:              1-978-684-1048
e-mail:              [email protected]<mailto:[email protected]>

50 Minuteman Rd.
Andover, MA  01810

"There is nothing more important than our customers."

From: Payne, Jimmy R. [mailto:[email protected]]
Sent: Friday, March 20, 2009 12:06 PM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] AP 1602




Well thank you Kim. You have been a great help in this matter. I hope I can 
assist you sometime.

Jimmy Payne, MCP
Forsyth County Information Technology
Systems Support Administrator
110 East Main Street
Suite 130
Cumming, GA 30040
770-205-4558
From: Kim Pedersen [mailto:[email protected]]
Sent: Friday, March 20, 2009 8:34 AM
To: Enterasys Customer Mailing List
Subject: Re: [enterasys] AP 1602


Hi Jimmy,

I haven't worked with the MP-620s but if they have the same requirement for DC 
Short, then yes, the antenna would work as expected


Kind regards,

Kim Pedersen
CNCS Ltd.
Fitzville
Haggatt Hall
Barbados
+1 246 429 8682




Payne, Jimmy R. wrote:
Kim,

                Thanks so much for your advice. I really couldn't understand 
why this was such a huge issue. Didn't seem like a huge deal to me to have a 
omni antenna for this AP.

                Let me run one more question by you. In your estimation,  would 
it be a correct statement to say  that if you had a ANT-1360 (which I think are 
intended for use with the MP-620's), with the correct adapters to make the 
cables match up, it should work as an omni for the 1602?

Jimmy Payne, MCP
Forsyth County Information Technology
Systems Support Administrator
110 East Main Street
Suite 130
Cumming, GA 30040
770-205-4558
From: Kim Pedersen [mailto:[email protected]]
Sent: Friday, March 20, 2009 7:29 AM
To: Enterasys Customer Mailing List
Subject: Re: [enterasys] AP 1602


Hi Jimmy,

I think I can throw in a couple of cents worth here:

The 1602 (And 4102s too AFAIK/Remember) need the antenna to provide DC Short or 
else the external antenna port won't activate and remains "stuck" using the 
internal antenna regardless of which antenna you set the AP to use in the 
software settings.

The Enterasys/Trapeze branded antennas all provide the DC Short, so they work. 
Most other 3rd party antennas don't.

Many amplifiers will provide the DC Short, so if you insert on of those between 
the omni and the AP, it will work correctly.

This bit us in the behind when we were installing a distributed antenna system 
using 70 1602s for the WiFi signal.

As a cheaper and simpler alternative to using amplifiiers, we found a lightning 
arrestor at L-Com that provides the DC short.
(http://www.l-com.com/productfamily.aspx?id=6194)

Our installation had 70 access points, and we ended up getting a 140 of these 
arrestors.

Yes, they are only rated for operation between 2.3-2.7GHz, but they do the 
trick for the 5GHz antenna port as well (With an increase in VSWR)



Hope it helps, and saves you some of the many hours we spent on the problem.


P.S. We opened a product improvement case with Enterasys, but after a year they 
determined this couldn't be done. I think it must be a limitation in the 
Trapeze design of the hardware, as well as HiPath is the future now


Kind regards,

Kim Pedersen
CNCS Ltd.
Fitzville
Haggatt Hall
Barbados
+1 246 429 8682





Payne, Jimmy R. wrote:
No they don't work at all. There is a setting in RASM that allows you to 
configure the type of antenna that you are connecting the AP to. Either 
internal or external. The antennas that I have tried, never switch over when 
you make that change and deploy it. I think at one time I heard someone say 
something about the antenna required to have a dc coupler. However, I am not 
sure I know what that means and how to determine if an antenna has that or not.

Jimmy Payne, MCP
Forsyth County Information Technology
Systems Support Administrator
110 East Main Street
Suite 130
Cumming, GA 30040
770-205-4558
From: Huber Adrian TRAIL [mailto:[email protected]]
Sent: Thursday, March 19, 2009 3:46 PM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] AP 1602

That's very interesting and odd. When you say they don't work, do you mean very 
poor performance? I noticed all antennas that are supported by 1602 are 50 
ohms, could it be possible that the antennas you tried were not 50 ohms? No 
matter what though, even if you used a paperclip, you should get some kind of 
signal, otherwise I'd suspect maybe it's a config/defect issue.

Thank you,

Adrian G. Huber, CCNA, N+, ESE, ATHC
Network Analyst
(250) 364 4805
Teck Cominco Metals Ltd.
25 Aldridge Ave
Trail, BC V1R  4L8
________________________________
From: Payne, Jimmy R. [mailto:[email protected]]
Sent: Thursday, March 19, 2009 12:27 PM
To: Enterasys Customer Mailing List
Subject: RE: [enterasys] AP 1602

No I have omnis that will work for the 4102s but I need one that I am certain 
will work with a 1602. This is the AP that looks like a smoke alarm. I have 
found a couple that will not work but none yet that will.

Jimmy Payne, MCP
Forsyth County Information Technology
Systems Support Administrator
110 East Main Street
Suite 130
Cumming, GA 30040
770-205-4558
From: Huber Adrian TRAIL [mailto:[email protected]]
Sent: Thursday, March 19, 2009 3:24 PM
To: Enterasys Customer Mailing List
Subject: RE:[enterasys] AP 1602

We used just a regular omni from antennex on our 4102 with a lightning 
arrestor. I think we used a 19dBi for max output power.
Unless I'm mistaken, any antenna will work so as long as you use the correct 
wavelength.

Thank you,

Adrian G. Huber, CCNA, N+, ESE, ATHC
Network Analyst
(250) 364 4805
Teck Cominco Metals Ltd.
25 Aldridge Ave
Trail, BC V1R  4L8
________________________________
From: Payne, Jimmy R. [mailto:[email protected]]
Sent: Thursday, March 19, 2009 12:08 PM
To: Enterasys Customer Mailing List
Subject: [enterasys] AP 1602


Can anyone advise me of an omni directional antenna that will work with an 
AP-1602?

Enterasys documentation does not show support for an omni attached to an 
AP-1602 however, I can't imagine that  there isn't  one that will work. Hope 
someone knows. Thanks for the help.

Jimmy Payne, MCP

Forsyth County Information Technology

Systems Support Administrator

110 East Main Street

Suite 130

Cumming, GA 30040

770-205-4558

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