[Asterisk-Users] [OT] PoE (Power over Ethernet) for 7940G
eric at fnords.org
Sat Mar 27 15:12:55 MST 2004
Michael Welter wrote:
> I have a few 7940G phones on a LAN hub, and I'm looking at the 3COM
> 3CNJPSE power injector. Can I put one of these behind my LAN hub and
> power all the phones, or do I need one for each phone?
> From the spec, it looks like PoE tries to discover whether a device is
> powered over ethernet. Can I just put 48VDC on pins 7-8? Will my
> Netgear pass this through to the phones?
Any power injector must be between the device it's powering and any
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