Eddie, You have 375 watts of POE power that you can distribute across the ports any way you want. You could have 24 Class 3 ports supplying a full 15.4 watts to every port or you could have 48 ports of Class 1 (4.0 watts) or Class 2 (7.0 watts). Remember that the SecureStacks have intelligent POE support. Only the actual power draw is permanently assigned to the port and unused power is returned to the power pool for distribution to other ports. So if you have a device that advertises itself as needing Class 3 power (15.4 watts) but only draws 10.0 watts of power, 5.4 watts of the unused power will be returned to the power pool for distribution to other ports. So with 375 watts of power, you could power up to 37 Class 3 devices that only needed 10.0 watts of power each. For Class 3 devices only requiring 8.0 watts of power, the B3G could support 46 of them.
Note: the power referenced here is the power output at the switch port. Please remember that there is power loss over the Ethernet cable. Per the standard a PSE (Power Sourcing Equipment) can output a maximum of 15.4 watts, a PD (Powered Device) can require a maximum of 12.95 watts. Karl F Pieper Product Manager - Fixed Switching Enterasys Networks Office: 978-684-1445 Cell: 978-886-9868 Email: [email protected] -----Original Message----- From: Eddie SanMarco Sr. [mailto:[email protected]] Sent: Monday, June 21, 2010 9:14 AM To: Enterasys Customer Mailing List Subject: RE: [enterasys] POE Switch I thought that GTAC had informed me that I should only connect up to 20 POE devices to a 48 port C3G switch? May want to get better confirmation before expecting the functionality to work even with redundant power supplies. It would be great if you could actually populate all 48 ports with PEO devices. I am very curious to see the results. Thanks, Eddie SanMarco Sr. IT Architect I - Network Support Information Technology Department City of Mesa, AZ 85201 Phone:480-644-4733 Cell:480-251-6544 -----Original Message----- From: Lalit, Shailendra [mailto:[email protected]] Sent: Tuesday, May 25, 2010 8:54 PM To: Enterasys Customer Mailing List Subject: RE: [enterasys] POE Switch Hi, Better use redundant PoE Power Supply with one DC cable. With best regards, Shailendra Lalit. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Gavade, Prashant Sent: Wednesday, May 19, 2010 10:30 AM To: Enterasys Customer Mailing List Subject: [enterasys] POE Switch Dear All, I am looking for connecting 48 POE phones to B3G124 48P switch. According to datasheet B3G124 48P switch supports 375 watts per switch with up to 15.4 watts per port. If my poe phone is supporting Class C then, can I connect these all for 48 ports? Can we control the power level of on each port? Class Measured current (mA) Maximum PD power (W) 3 25 to 34 6.49 to 12.95 Best Regards, Prashant Gavade --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected] --- To unsubscribe from enterasys, send email to [email protected] with the body: unsubscribe enterasys [email protected]
