Hi all, I'm looking for recommendations on ethernet switches for a new install. Ideally would want switches with at least 24 ports, ideally with a GE uplink, and that support PoE (power over ethernet) on every port. I've seen lots of switches, and lots of "power hubs", but the combination, which makes a lot of sense, seems rare. What is out there? Do the switches need to be special for IP phones in anyway? QoS support? Managed? Also, are there PoE phones that work with *? Most I look at seem to be powered from AC wall blocks. We'd like to centralize the switching and power and provide a UPS so the phone system works when the power goes out. [Apologies, I'm new to this whole concept of IP phones and *.] -- Mike Ciholas (812) 476-2721 voice CIHOLAS Enterprises (812) 476-2881 fax 2626 Kotter Ave, Unit D mikec@ciholas.com Evansville, IN 47715 http://www.ciholas.com
Hi Mike, Cisco makes PoE switches, either at the Cat 29xx or the Cat 35xx levels. The 29xx don't have gige uplinks, but the 35xx's do via GBIC interfaces. Meaning you will also need to get a GBIC media converter depending the media type (copper fiber, etc) And of course Cisco makes PoE based phones 7940 7960 which work well with * Grandstream currently requires a wall-wart, but later models are suppose to use PoE as well. I'd personally put the phones on their own subnet so that ACL filtering at the router will be easier, static IP alloc will be easier. hope this helps john brown chagres technologies, inc sip: 50870@fwd ptsn: (01) 505 830 1200 USA On Sun, Aug 17, 2003 at 12:44:43PM -0500, Mike Ciholas wrote:> > Hi all, > > I'm looking for recommendations on ethernet switches for a new > install. Ideally would want switches with at least 24 ports, > ideally with a GE uplink, and that support PoE (power over > ethernet) on every port. I've seen lots of switches, and lots of > "power hubs", but the combination, which makes a lot of sense, > seems rare. What is out there? Do the switches need to be > special for IP phones in anyway? QoS support? Managed? > > Also, are there PoE phones that work with *? Most I look at seem > to be powered from AC wall blocks. We'd like to centralize the > switching and power and provide a UPS so the phone system works > when the power goes out. > > [Apologies, I'm new to this whole concept of IP phones and *.] > > -- > Mike Ciholas (812) 476-2721 voice > CIHOLAS Enterprises (812) 476-2881 fax > 2626 Kotter Ave, Unit D mikec@ciholas.com > Evansville, IN 47715 http://www.ciholas.com > > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users
Andrew Joakimsen
2003-Aug-17 11:07 UTC
[Asterisk-Users] LAN switches with PoE? PoE phones?
The Snom VoIP phones support PoE and Nortel makes switches: http://www.nortelnetworks.com/products/02/bstk/switches/baystack_460/ I am not certain that they are compatible, as I have not used the Snom phones and have only used the Nortel switches with PoE adapters at the other end to power wireless access points or small hubs. -----Original Message----- From: asterisk-users-admin@lists.digium.com [mailto:asterisk-users-admin@lists.digium.com] On Behalf Of Mike Ciholas Sent: Sunday, August 17, 2003 1:45 PM To: asterisk-users@lists.digium.com Subject: [Asterisk-Users] LAN switches with PoE? PoE phones? pamAssassin 2.55 (1.174.2.19-2003-05-19-exp) Hi all, I'm looking for recommendations on ethernet switches for a new install. Ideally would want switches with at least 24 ports, ideally with a GE uplink, and that support PoE (power over ethernet) on every port. I've seen lots of switches, and lots of "power hubs", but the combination, which makes a lot of sense, seems rare. What is out there? Do the switches need to be special for IP phones in anyway? QoS support? Managed? Also, are there PoE phones that work with *? Most I look at seem to be powered from AC wall blocks. We'd like to centralize the switching and power and provide a UPS so the phone system works when the power goes out. [Apologies, I'm new to this whole concept of IP phones and *.] -- Mike Ciholas (812) 476-2721 voice CIHOLAS Enterprises (812) 476-2881 fax 2626 Kotter Ave, Unit D mikec@ciholas.com Evansville, IN 47715 http://www.ciholas.com _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users
To follow up on this, the Cisco Switches and the Cisco phones will work together to create two vlans: a prioritized vlan for the phone traffic, and a secondary 10/100 link for a computer which can be attached to the phone's second switched ethernet port. Some config is needed in the switch and router to make this happen properly. I have it running well with 79x0 phones, 3550 switch, and 1751-V router. What this means is only one switch port is needed to run both a phone and a computer. This helps on the switch/phone ROI calcs. The PoE can also be used to power wireless access points. Ray Burkholder 519 570 0689 x2002> -----Original Message----- > From: asterisk-users-admin@lists.digium.com > [mailto:asterisk-users-admin@lists.digium.com] On Behalf Of John Brown > Sent: August 17, 2003 13:52 > To: asterisk-users@lists.digium.com > Subject: Re: [Asterisk-Users] LAN switches with PoE? PoE phones? > > > Hi Mike, > > Cisco makes PoE switches, either at the Cat 29xx or > the Cat 35xx levels. The 29xx don't have gige uplinks, but > the 35xx's do via GBIC interfaces. Meaning you will also need > to get a GBIC media converter depending the media type (copper > fiber, etc) > > And of course Cisco makes PoE based phones 7940 7960 > which work well with * > > Grandstream currently requires a wall-wart, but later > models are suppose to use PoE as well. > > I'd personally put the phones on their own subnet so that > ACL filtering at the router will be easier, static IP alloc > will be easier. > > hope this helps > > john brown > chagres technologies, inc > sip: 50870@fwd > ptsn: (01) 505 830 1200 USA > > > > On Sun, Aug 17, 2003 at 12:44:43PM -0500, Mike Ciholas wrote: > > > > Hi all, > > > > I'm looking for recommendations on ethernet switches for a new > > install. Ideally would want switches with at least 24 ports, > > ideally with a GE uplink, and that support PoE (power over > > ethernet) on every port. I've seen lots of switches, and lots of > > "power hubs", but the combination, which makes a lot of sense, > > seems rare. What is out there? Do the switches need to be > > special for IP phones in anyway? QoS support? Managed? > > > > Also, are there PoE phones that work with *? Most I look at seem > > to be powered from AC wall blocks. We'd like to centralize the > > switching and power and provide a UPS so the phone system works > > when the power goes out. > > > > [Apologies, I'm new to this whole concept of IP phones and *.] > > > > -- > > Mike Ciholas (812) 476-2721 voice > > CIHOLAS Enterprises (812) 476-2881 fax > > 2626 Kotter Ave, Unit D mikec@ciholas.com > > Evansville, IN 47715 http://www.ciholas.com > > > > _______________________________________________ > > Asterisk-Users mailing list > > Asterisk-Users@lists.digium.com > > http://lists.digium.com/mailman/listinfo/asterisk-users > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > > -- > This message has been scanned for viruses and > dangerous content by MailScanner at One Unified, and is > believed to be clean. >
Steven Critchfield
2003-Aug-18 10:45 UTC
[Asterisk-Users] LAN switches with PoE? PoE phones?
On Sun, 2003-08-17 at 12:44, Mike Ciholas wrote:> Hi all, > > I'm looking for recommendations on ethernet switches for a new > install. Ideally would want switches with at least 24 ports, > ideally with a GE uplink, and that support PoE (power over > ethernet) on every port. I've seen lots of switches, and lots of > "power hubs", but the combination, which makes a lot of sense, > seems rare. What is out there? Do the switches need to be > special for IP phones in anyway? QoS support? Managed? > > Also, are there PoE phones that work with *? Most I look at seem > to be powered from AC wall blocks. We'd like to centralize the > switching and power and provide a UPS so the phone system works > when the power goes out.It is possible to make your own PoE adapter built into a punch down block. This is if you can find an appropriate 48volt power supply. I built an adapter for the 7960 we had here in the office, but my boss preferred the wall wart idea. -- Steven Critchfield <critch@basesys.com>
Mike Ciholas
2003-Aug-18 14:35 UTC
[Asterisk-Users] Re: LAN switches with PoE? PoE phones?
> From: Steven Critchfield <critch@basesys.com> > To: asterisk-users@lists.digium.com > Date: Mon, 18 Aug 2003 12:45:19 -0500 > Reply-To: asterisk-users@lists.digium.com > > It is possible to make your own PoE adapter built into a punch > down block. This is if you can find an appropriate 48volt power > supply. I built an adapter for the 7960 we had here in the > office, but my boss preferred the wall wart idea.Hmmm, I bet that violates the PoE specs as there is nothing "controlling" the 48 volts. That is, it isn't looking for a valid PoE signature in the terminal device before it sends 48 volts down the wire. This will surely fry some non PoE ethernet devices. -- Mike Ciholas (812) 476-2721 voice CIHOLAS Enterprises (812) 476-2881 fax 2626 Kotter Ave, Unit D mikec@ciholas.com Evansville, IN 47715 http://www.ciholas.com