On Sun, Sep 13, 2009 at 8:38 AM, Cuneyt M <[email protected]> wrote:
> Linksys switches in use are the latest two managed models - 24 and 48 > ports and the site have quite a number of them deployed (main switch > where sip server and gateways are, then extended to about 5-to-6 > location via uplink port - the extended locations also use the same > switch for phone end-point connection) I just wanted to chime in here as I wrestled with the power issues about a year ago. We experienced many of the same issues including freezing and reboots (mostly reboots) so I setup a small test environment using a Foundry FPS-648P switch and combination of 35 650/320 polycoms (http://emstar.com/installs/POE-Phones.jpg). The FGS has a "power-by-class" setting that allows power provisioning on each port. This gave us a the ability to test multiple power levels... The results were interesting: power-by-class 2 (330's are considered class 2 devices): Intercom paging was a big issue and would freeze or reboot the phones. Overall, we had intermittent issues all the way around. Introduction of a sidecar on the 650's almost always resulted in sporadic reboots. power-by-class 3: Issues went away with the exception if Polycom 650's with two side cars. I'm not convinced an attendant station with two sidecars will ever work well over POE. The other consideration is your cabling. For especially long runs (>150ft) you may want to consider 22AWG catagory cable. CAT6 is often made with the smaller gauge copper. DC current likes more copper. > > As the end-user already purchased number of these switches, replacing > all with HP Procurve will be relatively costly and perhaps not practical > taking into account the shrinking budgets. Not sure if this is the answer you are looking for, but sometimes you get what you pay for. The "cheapest" switch I feel comfortable recommending for a VOIP system is the HP 2610. My $.02 -Jim _______________________________________________ sipx-users mailing list [email protected] List Archive: http://list.sipfoundry.org/archive/sipx-users Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users sipXecs IP PBX -- http://www.sipfoundry.org/
