The times they are a changing - or something like that. while gb on phones is not the norm today, it s becoming more so on the higher end flavors and will continue to do so
since the life span of your switches will be several years, thinking ahead is a good thing my only concern is having too many poe ports in a single switch, especially if it is a 1U model, running many with 24 ports poe I have had failures after a year or so. And with the new POE+ spec coming this will get even worse. Think adding more fans = more noise to get rid of the additional heat they generate On Oct 6, 2008, at 12:04 PM, David Gibbons wrote: > Right, it takes some doing to find a 1Gb switching phone though we > ended up going with a system based on the Cisco 7941G-GE. This model > supports all of the needed features including vlan tagging and 1Gb > switching. > > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > ] On Behalf Of Robert Augustyn > Sent: Monday, October 06, 2008 12:01 PM > To: 'Asterisk Users Mailing List - Non-Commercial Discussion' > Subject: Re: [asterisk-users] PoE switch recommendations? > > Most phones support only 100M switching though .... Unless you run > separate > cabling for VoIP and data but then you would not need the 1G uplink. > >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of >> David Gibbons >> Sent: Monday, October 06, 2008 11:48 AM >> To: Asterisk Users Mailing List - Non-Commercial Discussion >> Subject: Re: [asterisk-users] PoE switch recommendations? >> >> Obviously we don't need 1Gb connections for VOIP :) >> >> Phones support pass through to the desktop and VLAN tagging. >> >> The need for 1Gb ports comes from wanting to have 1Gb at the desktop. >> >> Dave >> >> -----Original Message----- >> From: [EMAIL PROTECTED] >> [mailto:[EMAIL PROTECTED] On Behalf Of >> Gordon Henderson >> Sent: Monday, October 06, 2008 11:29 AM >> To: Asterisk Users Mailing List - Non-Commercial Discussion >> Subject: Re: [asterisk-users] PoE switch recommendations? >> >> On Mon, 6 Oct 2008, Ken D'Ambrosio wrote: >> >>> Hey, all. We're rolling out VoIP, and I'm wondering about PoE >>> recommendations, as we're going to have to replace our >> current network >>> equipment. My first inclination would be to just plunk >> down the cash >>> and do a Cisco system, but I'm relatively certain that >> would get shot >>> down by finance. Any recommendations for a couple-hundred-port >>> solution with VLANs, PoE, and QoS? Don't care much if it's in a >>> single chassis or not, so long as it has Gbit uplinks. >> >> I'm curious as to why you want Gb uplinks on the switches? >> >> If we assume 100Kb/sec per phone .. (gross rounding, using >> 100Kb/sec per phone, rather than ~80 - make the sums easier >> and builds in a margin) 10 calls per Mb/sec. >> >> So for a 24-port switch, 24 phones all talking to 24 >> extensions off that switch, the max the uplink port is going >> to be pushing out is 2.4Mb/sec. >> >> For 200 extensions, say 9 x 24 port switches, with a single >> top-level (non PoE switch) switch with the PBX plugged in >> along side the 9 downlinks, that single PBX link will be >> carrying 2.4*9 = 22Mb/sec if all phones are in-use at the >> same time (and the PBX is carrying media) >> >> Now you may not want to build the network like that, but it >> seems that Gb is overkill just for the VoIP side of things. >> (And with that many extensions, I would suggest keeping all >> the phones on one set of switches) >> >> (Then again, it might not be possible to get big PoE switches >> without Gb uplinks, so it might be a moot point!) >> >> So satisfy my curiosity - why Gb uplinks? >> >> Cheers, >> >> Gordon >> >> _______________________________________________ >> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >> >> AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register >> Now: http://www.astricon.net >> >> asterisk-users mailing list >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users >> >> _______________________________________________ >> -- Bandwidth and Colocation Provided by http://www.api-digital.com -- >> >> AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register >> Now: http://www.astricon.net >> >> asterisk-users mailing list >> To UNSUBSCRIBE or update options visit: >> http://lists.digium.com/mailman/listinfo/asterisk-users > > > _______________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > AstriCon 2008 - September 22 - 25 Phoenix, Arizona > Register Now: http://www.astricon.net > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users > > _______________________________________________ > -- Bandwidth and Colocation Provided by http://www.api-digital.com -- > > AstriCon 2008 - September 22 - 25 Phoenix, Arizona > Register Now: http://www.astricon.net > > asterisk-users mailing list > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ -- Bandwidth and Colocation Provided by http://www.api-digital.com -- AstriCon 2008 - September 22 - 25 Phoenix, Arizona Register Now: http://www.astricon.net asterisk-users mailing list To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users
