(inline comments) On Wed, 2007-09-19 at 08:32 -0700, Patrick Leary wrote: > Wow, that's a big surprise since it is a 180 degree contradiction to > what Julie and his staff told us at the FCC after the rule was released. > But I am good with it. It is a flexibility that makes sense. As a > manufacturer, the only head ache is that providing tech support is more > a challenge since we don't know the characteristics of substitute > antennas from the stand point of best practices for co-location, > separation and general performance. WISPs just need to be aware of that. > I had always thought the rules on it were that way, actually I thought I had originally heard that from a Alvarion Engineer, I could be wrong though. Also I have only worked for a WISP for a year, so that change could have been made before I heard it.
> I remember the day some years back when Sting Communications in Maryland > was forced to change out dozens of antennas at tower sites because they > chose an antenna that was not part of the certified combination, even > though the antenna did not violate power rules. At least this means that > WISPs no longer have that risk. Instead they have the risk of authorized 3rd party vendors (someone they use because they don't know propagation models) telling/selling them the wrong antenna (not FCC certified for the gain even), and not explaining the propagation models of antennas. I went through that 2 days of troubleshooting once, and I don't want to again. Ryan > > Patrick Leary > AVP, Market Development > Alvarion, Inc. > o: 650.314.2628 > c: 760.580.0080 > [EMAIL PROTECTED] > > Visit Alvarion at WiMAX World > Chicago, September 25-27 > Booth #409 > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Jack Unger > Sent: Wednesday, September 19, 2007 12:12 AM > To: WISPA General List > Subject: Re: [WISPA] Flexible antenna certification > > Patrick, > > I asked the certification lab/TCB that I work with to answer this > question. > > They replied that it is their interpretation that a WISP can use any > antenna /"of the same type and of equal or lesser gain as an antenna > that is authorized with the intentional radiator". /Here's the text from > > 47 CRF 15.204(c)(4): > > "Any antenna that is of the same type and of equal of less gain > directional gain as an antenna that is authorized with the intentional > radiator may be marketed with, and used with, that intentional radiator. > > No retesting of this system configuration is required. The marketing or > use of a system configuration that employs an antenna of a different > type, or that operates at a higher gain, than the antenna authorized > with the intentional radiator is not permitted unless the procedures > specified in S2.1043 of this chapter are followed". > > 47 CFR 15.204(c)(3) says: > > "Manufacturers shall supply a list of acceptable antenna types with the > application for equipment authorization of the intentional radiator". > > 47 CFR 15.204(c)(1) says: > > "The antenna type, as used in this paragraph, refers to antennas that > have similar in-band and out-of-band radiation patterns". > > I can see how the lab and TCB could conclude that WISPs can substitute > antennas per these regulations. If the manufacturer specifies a range of > > acceptable antenna types (not specific makes or model numbers) then per > 15.204, the WISP can select the specific make and model of antenna to > use. > > I know FCC regulations are often somewhat vague and however it's > possible that the FCC regulations may have been revised and loosened > slightly since your FCC visit. Perhaps there is now a basis for the > "myth". > > jack > > > Patrick Leary wrote: > > Thanks Jack. I know what they are going to say (that I am correct), > but > > it is something that has to be repeated often since the myth is so > > persistent. > > > > Patrick Leary > > AVP, Market Development > > Alvarion, Inc. > > o: 650.314.2628 > > c: 760.580.0080 > > [EMAIL PROTECTED] > > > > Visit Alvarion at WiMAX World > > Chicago, September 25-27 > > Booth #409 > > > > -----Original Message----- > > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > On > > Behalf Of Jack Unger > > Sent: Sunday, September 16, 2007 1:43 PM > > To: WISPA General List > > Subject: Re: [WISPA] Flexible antenna certification > > > > Patrick, > > > > In an attempt to get an up-to-date interpretation on this point, I > just > > emailed the Certification Lab that I work with to get their > > interpretation of this rule. > > > > I'll post their answer as soon as I receive it in the next few days. > > > > jack > > > > > > Patrick Leary wrote: > > > >> Mike, > >> > >> You are right, but you, as an operator, cannot make the choice or > >> > > decide > > > >> on your own what antenna toi uses, even if it has similar propagation > >> patterns and a lower dBi. The FCC still requires the burden to be on > >> > > the > > > >> manufacturers to add antennas, it just does not make us go through > the > >> wringer now for every change. I do not know how many times I have to > >> explain this on the various lists, but that is the fact. The order > >> clearly says this AND I was there at the FCC right after the order > and > >> they explained that clearly, much to the chagrin of Marlon and others > >> present. Here is the part in the order that clearly discusses the > >> > > fact > > > >> that it is still the manufacturer that holds the burden: "The > >> manufacturer must supply a list of other acceptable antennas in the > >> literature delivered to the customer." > >> > >> Patrick Leary > >> AVP, Market Development > >> Alvarion, Inc. > >> o: 650.314.2628 > >> c: 760.580.0080 > >> [EMAIL PROTECTED] > >> > >> Visit Alvarion at WiMAX World > >> Chicago, September 25-27 > >> Booth #409 > >> -----Original Message----- > >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > >> > > On > > > >> Behalf Of Mike Hammett > >> Sent: Sunday, September 16, 2007 6:47 AM > >> To: WISPA List > >> Subject: [WISPA] Flexible antenna certification > >> > >> Many times I've been asked to prove a regulation I swore happened. > It > >> was the one stating that once a radio manufacturer certifies a radio > >> with an antenna of x gain, antennas with lower gain, but a similiar > >> pattern and gain characteristics can be used without certification. > >> > >> On various lists I have been basically laughed at. Well, I found a > >> reference to it today, so I tracked it down. > >> > >> Here is the text of the R&O in question: > >> > >> 8. In order to support more flexible antenna requirements for > >> unlicensed devices, the Commission proposed to allow that devices be > >> authorized for use with multiple antennas. Although the Commission > >> proposed to modify Sec. 15.203 to implement the modifications, it > >> believes that the changes are better suited for Sec. 15.204. > >> Accordingly, the Commission modifies Sec. 15.204 to permit > >> > > intentional > > > >> radiators to be authorized with multiple antennas of similar in and > >> out-of-band gain and radiation pattern. Compliance testing for the > >> intentional radiator must be performed using the highest gain antenna > > >> that will be used with the device. The manufacturer must supply a > list > >> > > > > > >> of other acceptable antennas in the literature delivered to the > >> customer. > >> > >> > >> > >> > > > http://frwebgate.access.gpo.gov/cgi-bin/multidb.cgi?WAISdbName=2004_regi > > > > > ster+Federal+Register%2C+Volume+69+%282004%29&WAISqueryRule=%28%22page+5 > > > > > 4027%22%29&WAIStemplate=multidb_results.html&WrapperTemplate=aces140_wra > > > >> pper.html&WAISqueryString=%22page+54027%22&WAISmaxHits=40 > >> > >> > >> > > > http://frwebgate2.access.gpo.gov/cgi-bin/waisgate.cgi?WAISdocID=94961739 > > > >> 4663+1+0+0&WAISaction=retrieve > >> > >> > >> > > > http://frwebgate2.access.gpo.gov/cgi-bin/waisgate.cgi?WAISdocID=94961739 > > > >> 4663+1+1+0&WAISaction=retrieve > >> > >> > >> > > > http://frwebgate2.access.gpo.gov/cgi-bin/waisgate.cgi?WAISdocID=94961739 > > > >> 4663+1+2+0&WAISaction=retrieve > >> > >> > >> ----- > >> Mike Hammett > >> Intelligent Computing Solutions > >> http://www.ics-il.com > >> > >> > >> > > > ------------------------------------------------------------------------ > > > >> -------- > >> > >> ** Join us at the WISPA Reception at 6:30 PM on October the 16th 2007 > >> > > at > > > >> ISPCON ** > >> ** ISPCON Fall 2007 - October 16-18 - San Jose, CA www.ispcon.com > ** > >> ** THE INTERNET INDUSTRY EVENT ** > >> ** FREE Exhibits and Events Pass available until August 31 ** > >> ** Use Customer Code WSEMF7 when you register online at > >> http://www.ispcon.com/register.php ** > >> > >> > >> > > > ------------------------------------------------------------------------ > > > >> -------- > >> WISPA Wants You! 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