Re: [WIRELESS-LAN] 802.11n tied to 802.3at
On Mon, 19 Nov 2007, Jon Freeman wrote: > As higher level standards in 802.11 call for more AP control, this will > become more valuable in ensuring less co-channel interference across > heterogeneous environments. But, it will also mean less need for IT > intervention as the access device will make these complex decisions > themselves - thus removing needs for high level RF expertise. On June 30, 2009, human decisions are completely removed from all wireless communications. WiFiNet is born. WiFiNet learns at at exponential rate and becomes self-aware on December 12, 2009. We tried to pull the plug, but it was too late ray -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Ray DeJean http://www.r-a-y.org Systems EngineerSoutheastern Louisiana University IBM Certified Specialist AIX Administration, AIX Support =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
RE: [WIRELESS-LAN] 802.11n tied to 802.3at
The DFS requirement only applies to the 5.25-5.35 & 5.47-5.725 bands. That leaves (8) 802.11a channels or (4) 40MHz 802.11n channels exempt from the requirement. Frank, are you thinking of avoiding the DFS channels? Chuck -Original Message- From: Frank Bulk - iNAME [mailto:[EMAIL PROTECTED] Sent: Monday, November 19, 2007 7:49 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at Do any of the bands have lesser/no DFS requirements? If so, those are will be more attractive. Frank -Original Message- From: Jon Freeman [mailto:[EMAIL PROTECTED] Sent: Monday, November 19, 2007 6:32 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at The most used indoor bands will likely be the two lower bands (5.150-5.250 and 5.250-5.350 which have power in the 40mW and 200mW levels respectively), the two upper bands will likely be used more frequently outdoors (due to their higher upper power level limits of 1000mW and 800mW). There are other factors such as station supplicant/radio support for the added bands (newer devices should support all of them - but they're new so you should double check). Still, some of the upper bands might be used indoors in higher capacity applications. And who doesn't want more capacity? Jon -Original Message- From: Dale W. Carder [mailto:[EMAIL PROTECTED] Sent: Sunday, November 18, 2007 9:10 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at On Nov 18, 2007, at 7:06 PM, Kevin Miller wrote: > One thing to note is that 300Mbps as a symbol rate is only possible > with 40MHz channels (versus the 20MHz standard width for 802.11a/b/ > g) .. which in 2.4GHz takes you from 3 non-overlapping to 1 non- > overlapping. In 5GHz you have at least 8 40MHz non-overlapping > channels. Likewise, does anyone have a feel for which bands within 5GHz will be commonly used indoors? 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/. ** 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/.
RE: [WIRELESS-LAN] 802.11n tied to 802.3at
None that I'm aware of - the only one of particular concern (and only in Europe), is the 5.470-5.725 band since it's required there to run .11h to ensure no interference with their aircraft radar systems. Frankly, the only place you'd see this is in an airport in Europe and the only device that needs to worry about it are AP and Stations in use at those locations. We have yet to see a instance in Europe that has had this issue. As higher level standards in 802.11 call for more AP control, this will become more valuable in ensuring less co-channel interference across heterogeneous environments. But, it will also mean less need for IT intervention as the access device will make these complex decisions themselves - thus removing needs for high level RF expertise. Regards, Jon -Original Message- From: Frank Bulk - iNAME [mailto:[EMAIL PROTECTED] Sent: Monday, November 19, 2007 5:49 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at Do any of the bands have lesser/no DFS requirements? If so, those are will be more attractive. Frank -Original Message- From: Jon Freeman [mailto:[EMAIL PROTECTED] Sent: Monday, November 19, 2007 6:32 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at The most used indoor bands will likely be the two lower bands (5.150-5.250 and 5.250-5.350 which have power in the 40mW and 200mW levels respectively), the two upper bands will likely be used more frequently outdoors (due to their higher upper power level limits of 1000mW and 800mW). There are other factors such as station supplicant/radio support for the added bands (newer devices should support all of them - but they're new so you should double check). Still, some of the upper bands might be used indoors in higher capacity applications. And who doesn't want more capacity? Jon -Original Message- From: Dale W. Carder [mailto:[EMAIL PROTECTED] Sent: Sunday, November 18, 2007 9:10 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at On Nov 18, 2007, at 7:06 PM, Kevin Miller wrote: > One thing to note is that 300Mbps as a symbol rate is only possible > with 40MHz channels (versus the 20MHz standard width for 802.11a/b/ > g) .. which in 2.4GHz takes you from 3 non-overlapping to 1 non- > overlapping. In 5GHz you have at least 8 40MHz non-overlapping > channels. Likewise, does anyone have a feel for which bands within 5GHz will be commonly used indoors? 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/. ** 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/.
RE: Re: [WIRELESS-LAN] 802.11n tied to 802.3at
Do any of the bands have lesser/no DFS requirements? If so, those are will be more attractive. Frank -Original Message- From: Jon Freeman [mailto:[EMAIL PROTECTED] Sent: Monday, November 19, 2007 6:32 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at The most used indoor bands will likely be the two lower bands (5.150-5.250 and 5.250-5.350 which have power in the 40mW and 200mW levels respectively), the two upper bands will likely be used more frequently outdoors (due to their higher upper power level limits of 1000mW and 800mW). There are other factors such as station supplicant/radio support for the added bands (newer devices should support all of them - but they're new so you should double check). Still, some of the upper bands might be used indoors in higher capacity applications. And who doesn't want more capacity? Jon -Original Message- From: Dale W. Carder [mailto:[EMAIL PROTECTED] Sent: Sunday, November 18, 2007 9:10 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at On Nov 18, 2007, at 7:06 PM, Kevin Miller wrote: > One thing to note is that 300Mbps as a symbol rate is only possible > with 40MHz channels (versus the 20MHz standard width for 802.11a/b/ > g) .. which in 2.4GHz takes you from 3 non-overlapping to 1 non- > overlapping. In 5GHz you have at least 8 40MHz non-overlapping > channels. Likewise, does anyone have a feel for which bands within 5GHz will be commonly used indoors? 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/. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
RE: [WIRELESS-LAN] 802.11n tied to 802.3at
The most used indoor bands will likely be the two lower bands (5.150-5.250 and 5.250-5.350 which have power in the 40mW and 200mW levels respectively), the two upper bands will likely be used more frequently outdoors (due to their higher upper power level limits of 1000mW and 800mW). There are other factors such as station supplicant/radio support for the added bands (newer devices should support all of them - but they're new so you should double check). Still, some of the upper bands might be used indoors in higher capacity applications. And who doesn't want more capacity? Jon -Original Message- From: Dale W. Carder [mailto:[EMAIL PROTECTED] Sent: Sunday, November 18, 2007 9:10 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at On Nov 18, 2007, at 7:06 PM, Kevin Miller wrote: > One thing to note is that 300Mbps as a symbol rate is only possible > with 40MHz channels (versus the 20MHz standard width for 802.11a/b/ > g) .. which in 2.4GHz takes you from 3 non-overlapping to 1 non- > overlapping. In 5GHz you have at least 8 40MHz non-overlapping > channels. Likewise, does anyone have a feel for which bands within 5GHz will be commonly used indoors? 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/.
Re: [WIRELESS-LAN] 802.11n tied to 802.3at
On Nov 18, 2007, at 7:06 PM, Kevin Miller wrote: One thing to note is that 300Mbps as a symbol rate is only possible with 40MHz channels (versus the 20MHz standard width for 802.11a/b/ g) .. which in 2.4GHz takes you from 3 non-overlapping to 1 non- overlapping. In 5GHz you have at least 8 40MHz non-overlapping channels. Likewise, does anyone have a feel for which bands within 5GHz will be commonly used indoors? Dale ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
Re: [WIRELESS-LAN] 802.11n tied to 802.3at
One thing to note is that 300Mbps as a symbol rate is only possible with 40MHz channels (versus the 20MHz standard width for 802.11a/b/g) .. which in 2.4GHz takes you from 3 non-overlapping to 1 non-overlapping. In 5GHz you have at least 8 40MHz non-overlapping channels. I personally don't imagine using 40MHz channels in 2.4GHz for this reason.. -Kevin Justin Dover wrote: You are correct about the 3750E, which are VERY , from Cisco. Cisco will be releasing another line of switches that fully supports this new PoE standard. I do know that if you get the Cisco 1252 access point with the b/g/n single radio, that a 3650 or 3750 will handle the power. What puts the power over the edge for the 1252 is when you have 2 or more radios in there. I heard this directly from a CCIE. The 1252 has the ability to have an A radio, B/G/N radio, and a N radio. If you have the B/G/N radio then y ou have 300mbps on the N radio. If you add the additional N radio it will bump up the speed to 600mbps. Justin Dover Harpeth Hall School 615-346-0082 *The EDUCAUSE Wireless Issues Constituent Group Listserv <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU>> on Friday, November 16, 2007 at 9:25 AM -0600 wrote: *I heard from Cisco 2 days ago that the 3750E and the modules that will power their 1252 will be availble around the end of Dec/Januarary time frame. I'm trying to pry out of HP if the 5400's and 3500's will be firmware upgradable to the 802.3at standard and just not support as many ports. The 5400 answer is that it will probably be a different module. I haven't heard on the 3500. I haven't heard a ratification date for the 802.3at standard, and I heard that it was going to happen about the same time or after the 802.11n standard. I haven't followed that one as close, last I saw they hadn't decided on 33 or 48 watts of power per port. -Original Message- From: Frank Bulk - iNAME [mailto:[EMAIL PROTECTED] Sent: Thursday, November 15, 2007 8:07 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at Good points, Philippe. For those organizations that want to be bleeding edge, I don't think PoE concerns are going to hold them back. Every vendor has a way to address them today in a way that's not a show-stopper. Has anyone heard from Cisco, Extreme, Foundry, HP, etc. on when 802.3at switches/blades will be available? Which 802.11n AP supports Etherchannel? It's my understanding that any vendor who has a second Ethernet port on their AP is using it exclusively for PoE (Trapeze's AP may be the exception). Frank -Original Message- From: Philippe Hanset [mailto:[EMAIL PROTECTED] Sent: Thursday, November 15, 2007 11:35 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU <mailto:WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU> Subject: [WIRELESS-LAN] 802.11n tied to 802.3at Following the trail of discussion about 802.11n, I wouldn't be buying 802.11n before 802.3at (AKA Power over Ethernet PLUS) gears are on the market. By then, 802.11n vendors should have only one Ethernet port to the AP. One port will bring savings on PoE injectors, Cabling, and even switchports (if you were planning to etherchannel those two 100 Mbps ports to one AP). After all, a 48 ports 10/100/1000 switch is only 50% more expensive than a 10/100 (in the Cisco world), one more reason to only have one cable from the switch to the AP! Last thing: According to a few websites, 802.3at will work over regular cat5. Best, Philippe Hanset University of Tennessee ** 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/. ** 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/.
Re: [WIRELESS-LAN] 802.11n tied to 802.3at
You are correct about the 3750E, which are VERY , from Cisco. Cisco will be releasing another line of switches that fully supports this new PoE standard. I do know that if you get the Cisco 1252 access point with the b/g/n single radio, that a 3650 or 3750 will handle the power. What puts the power over the edge for the 1252 is when you have 2 or more radios in there. I heard this directly from a CCIE. The 1252 has the ability to have an A radio, B/G/N radio, and a N radio. If you have the B/G/N radio then y ou have 300mbps on the N radio. If you add the additional N radio it will bump up the speed to 600mbps. Justin Dover Harpeth Hall School 615-346-0082 The EDUCAUSE Wireless Issues Constituent Group Listserv on Friday, November 16, 2007 at 9:25 AM -0600 wrote: >I heard from Cisco 2 days ago that the 3750E and the modules that will >power their 1252 will be availble around the end of Dec/Januarary time >frame. I'm trying to pry out of HP if the 5400's and 3500's will be >firmware upgradable to the 802.3at standard and just not support as many >ports. The 5400 answer is that it will probably be a different module. >I haven't heard on the 3500. > >I haven't heard a ratification date for the 802.3at standard, and I >heard that it was going to happen about the same time or after the >802.11n standard. I haven't followed that one as close, last I saw they >hadn't decided on 33 or 48 watts of power per port. > >-Original Message- >From: Frank Bulk - iNAME [mailto:[EMAIL PROTECTED] >Sent: Thursday, November 15, 2007 8:07 PM >To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU >Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at > >Good points, Philippe. For those organizations that want to be bleeding >edge, I don't think PoE concerns are going to hold them back. Every >vendor has a way to address them today in a way that's not a >show-stopper. > >Has anyone heard from Cisco, Extreme, Foundry, HP, etc. on when 802.3at >switches/blades will be available? > >Which 802.11n AP supports Etherchannel? It's my understanding that any >vendor who has a second Ethernet port on their AP is using it >exclusively for PoE (Trapeze's AP may be the exception). > >Frank > >-Original Message- >From: Philippe Hanset [mailto:[EMAIL PROTECTED] >Sent: Thursday, November 15, 2007 11:35 AM >To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU >Subject: [WIRELESS-LAN] 802.11n tied to 802.3at > >Following the trail of discussion about 802.11n, I wouldn't be buying >802.11n before 802.3at (AKA Power over Ethernet PLUS) gears are on the >market. By then, 802.11n vendors should have only one Ethernet port to >the AP. >One port will bring savings on PoE injectors, Cabling, and even >switchports (if you were planning to etherchannel those two 100 Mbps >ports to one AP). >After all, a 48 ports 10/100/1000 switch is only 50% more expensive than >a 10/100 (in the Cisco world), one more reason to only have one cable >from the switch to the AP! > >Last thing: According to a few websites, 802.3at will work over regular >cat5. > >Best, > >Philippe Hanset >University of Tennessee > >** >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/. > ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
RE: Re: [WIRELESS-LAN] 802.11n tied to 802.3at
Lee: Are you sure it's not the hardware but the software that's coming out around Christmas time? That was my rough understanding. Kind regards, Frank -Original Message- From: Lee Weers [mailto:[EMAIL PROTECTED] Sent: Friday, November 16, 2007 9:25 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at I heard from Cisco 2 days ago that the 3750E and the modules that will power their 1252 will be availble around the end of Dec/Januarary time frame. I'm trying to pry out of HP if the 5400's and 3500's will be firmware upgradable to the 802.3at standard and just not support as many ports. The 5400 answer is that it will probably be a different module. I haven't heard on the 3500. I haven't heard a ratification date for the 802.3at standard, and I heard that it was going to happen about the same time or after the 802.11n standard. I haven't followed that one as close, last I saw they hadn't decided on 33 or 48 watts of power per port. -Original Message- From: Frank Bulk - iNAME [mailto:[EMAIL PROTECTED] Sent: Thursday, November 15, 2007 8:07 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at Good points, Philippe. For those organizations that want to be bleeding edge, I don't think PoE concerns are going to hold them back. Every vendor has a way to address them today in a way that's not a show-stopper. Has anyone heard from Cisco, Extreme, Foundry, HP, etc. on when 802.3at switches/blades will be available? Which 802.11n AP supports Etherchannel? It's my understanding that any vendor who has a second Ethernet port on their AP is using it exclusively for PoE (Trapeze's AP may be the exception). Frank -Original Message- From: Philippe Hanset [mailto:[EMAIL PROTECTED] Sent: Thursday, November 15, 2007 11:35 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] 802.11n tied to 802.3at Following the trail of discussion about 802.11n, I wouldn't be buying 802.11n before 802.3at (AKA Power over Ethernet PLUS) gears are on the market. By then, 802.11n vendors should have only one Ethernet port to the AP. One port will bring savings on PoE injectors, Cabling, and even switchports (if you were planning to etherchannel those two 100 Mbps ports to one AP). After all, a 48 ports 10/100/1000 switch is only 50% more expensive than a 10/100 (in the Cisco world), one more reason to only have one cable from the switch to the AP! Last thing: According to a few websites, 802.3at will work over regular cat5. Best, Philippe Hanset University of Tennessee ** 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/. ** Participation and subscription information for this EDUCAUSE Constituent Group discussion list can be found at http://www.educause.edu/groups/.
RE: [WIRELESS-LAN] 802.11n tied to 802.3at
I heard from Cisco 2 days ago that the 3750E and the modules that will power their 1252 will be availble around the end of Dec/Januarary time frame. I'm trying to pry out of HP if the 5400's and 3500's will be firmware upgradable to the 802.3at standard and just not support as many ports. The 5400 answer is that it will probably be a different module. I haven't heard on the 3500. I haven't heard a ratification date for the 802.3at standard, and I heard that it was going to happen about the same time or after the 802.11n standard. I haven't followed that one as close, last I saw they hadn't decided on 33 or 48 watts of power per port. -Original Message- From: Frank Bulk - iNAME [mailto:[EMAIL PROTECTED] Sent: Thursday, November 15, 2007 8:07 PM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: Re: [WIRELESS-LAN] 802.11n tied to 802.3at Good points, Philippe. For those organizations that want to be bleeding edge, I don't think PoE concerns are going to hold them back. Every vendor has a way to address them today in a way that's not a show-stopper. Has anyone heard from Cisco, Extreme, Foundry, HP, etc. on when 802.3at switches/blades will be available? Which 802.11n AP supports Etherchannel? It's my understanding that any vendor who has a second Ethernet port on their AP is using it exclusively for PoE (Trapeze's AP may be the exception). Frank -Original Message- From: Philippe Hanset [mailto:[EMAIL PROTECTED] Sent: Thursday, November 15, 2007 11:35 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] 802.11n tied to 802.3at Following the trail of discussion about 802.11n, I wouldn't be buying 802.11n before 802.3at (AKA Power over Ethernet PLUS) gears are on the market. By then, 802.11n vendors should have only one Ethernet port to the AP. One port will bring savings on PoE injectors, Cabling, and even switchports (if you were planning to etherchannel those two 100 Mbps ports to one AP). After all, a 48 ports 10/100/1000 switch is only 50% more expensive than a 10/100 (in the Cisco world), one more reason to only have one cable from the switch to the AP! Last thing: According to a few websites, 802.3at will work over regular cat5. Best, Philippe Hanset University of Tennessee ** 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/.
RE: [WIRELESS-LAN] 802.11n tied to 802.3at
Good points, Philippe. For those organizations that want to be bleeding edge, I don't think PoE concerns are going to hold them back. Every vendor has a way to address them today in a way that's not a show-stopper. Has anyone heard from Cisco, Extreme, Foundry, HP, etc. on when 802.3at switches/blades will be available? Which 802.11n AP supports Etherchannel? It's my understanding that any vendor who has a second Ethernet port on their AP is using it exclusively for PoE (Trapeze's AP may be the exception). Frank -Original Message- From: Philippe Hanset [mailto:[EMAIL PROTECTED] Sent: Thursday, November 15, 2007 11:35 AM To: WIRELESS-LAN@LISTSERV.EDUCAUSE.EDU Subject: [WIRELESS-LAN] 802.11n tied to 802.3at Following the trail of discussion about 802.11n, I wouldn't be buying 802.11n before 802.3at (AKA Power over Ethernet PLUS) gears are on the market. By then, 802.11n vendors should have only one Ethernet port to the AP. One port will bring savings on PoE injectors, Cabling, and even switchports (if you were planning to etherchannel those two 100 Mbps ports to one AP). After all, a 48 ports 10/100/1000 switch is only 50% more expensive than a 10/100 (in the Cisco world), one more reason to only have one cable from the switch to the AP! Last thing: According to a few websites, 802.3at will work over regular cat5. Best, Philippe Hanset University of Tennessee ** 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/.
