If you look for instance at a PowerDsine 6000 serie Midspan power injector, it is 802.3af compliant, and supports GigE. That's what we buy today in preparation for 802.11n. (and crossing our fingers ;-) I have a secret hope that 802.11b/g will be for coverage, (the Iphone will decide!) 802.11n at 5 Ghz for performance and who knowns what will happened to 802.11a (cheap point-to-point?) Hopefully the 15 watts of 802.3af will suffice for b/g and n at 5Ghz on one AP!
Philippe Hanset University of Tennessee On Wed, 27 Jun 2007, Enfield, Chuck wrote: > Since we can't do 3af power with GigE, that one connection would have to be > 100Mb. If we're going to use two cables for power let's hope we'll be given > the chance to use two data channels as well. > > Chuck > > -----Original Message----- > From: Tomo [mailto:[EMAIL PROTECTED] > Sent: Wednesday, June 27, 2007 4:14 AM > To: [email protected] > Subject: Re: [WIRELESS-LAN] The strategic importance of 5GHz > > The Airwave webinar (for which a link was sent round last week) mentioned > that some vendors are looking at providing two Ethernet sockets on MIMO / > 802.11n Access Points, so they could draw 2 x 802.3af power connections and > one live Ethernet connection. > > _________________________________ > > Tomo | Senior Network & Telecommunications Infrastructure Engineer Direct > line: +44 (0)20 7000 7777 | Email: [EMAIL PROTECTED] > > www.london.edu > > > > -----Original Message----- > > From: Frank Bulk - iNAME [mailto:[EMAIL PROTECTED] > > Sent: 27 June 2007 02:32 > > To: [email protected] > > Subject: Re: [WIRELESS-LAN] The strategic importance of 5GHz > > > > Dale: > > > > I've heard from at least one vendor that a b/g radio with and 802.11n > > radio may operate within 802.3af power limits. But I've heard nothing > > absolutely definite so far and I anticipate that we'll know more by > > the end of > the > > summer as these products move from short-run samples to production. > > > > The whole 802.11n PoE and GigE port thing really puts most > organizations > > into a pickle...they can cheat with using 100BaseT at the edge but if > you > > really want to do full 802.11n on two radios it's going to necessitate > a > > midspan, PoE injectors, or a new switch (and that will be at least a > year > > away). If vendors can make an AP with an 802.11b/g radio and an > 802.11n > > radio operate within 802.3af power limits that should give > organizations > > the > > breathing room they need to upgrade their edge switching > infrastructure > > over > > the next 3-5 years. > > > > Frank > > > > -----Original Message----- > > From: Dale W. Carder [mailto:[EMAIL PROTECTED] > > Sent: Tuesday, June 26, 2007 3:55 PM > > To: [email protected] > > Subject: Re: [WIRELESS-LAN] The strategic importance of 5GHz > > > > On Jun 25, 2007, at 11:57 AM, Enfield, Chuck wrote: > > > We currently only have one UTP cable to an AP location. > > > > > > The alternative is one GigE drop with either local power or > > > proprietary UTP based power (including possible pre-standard > > > 802.3at). > > > > One thing we did for the last 3 years is to pull siamese cable to each > > AP location, setting up the infrastructure in advance for a technology > > change. > > > > What will probably screw us as you mention is not enough PoE via > 802.3af. > > Having an AP with bg on 2.4 and MIMO on 5 will probably require > 802.3at. > > So in addition to replacing your AP's, you are now also forklifting > your > > PoE switches... > > > > Dale > > > > ********** > > Participation and subscription information for this EDUCAUSE > Constituent > > Group discussion list can be found at http://www.educause.edu/groups/. > > > > ********** > > Participation and subscription information for this EDUCAUSE > Constituent > > Group discussion list can be found at http://www.educause.edu/groups/. > > > > ______________________________________________________________________ > > > > This email has been scanned by the MessageLabs Email Security System > > on behalf of the London Business School community. > > For more information please visit http://www.messagelabs.com/email > > ______________________________________________________________________ > > ______________________________________________________________________ > > This email has been scanned by the MessageLabs Email Security System on > behalf of the London Business School community. > For more information please visit http://www.messagelabs.com/email > ______________________________________________________________________ > > ********** > Participation and subscription information for this EDUCAUSE Constituent > Group discussion list can be found at http://www.educause.edu/groups/. > > ********** > Participation and subscription information for this EDUCAUSE Constituent > Group discussion list can be found at http://www.educause.edu/groups/. > ********** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
