incompatibilities with fS.
Many use PoE(Power over Ethernet) - and there is at least 2 standards..
POE can be IEEE 802.3af (about 13W) or IEEE 802.3at(about 25W) -- some out of standard claim 50W..
Looks like most SIP phones only need the af - most use about 2-3W ( probably less these days.. )
POE giga-bit switches are not commodity cheap yet..
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