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| PoE and PPPoE |
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| July 30, 2008 |
Compared with the PPPoE/Router confusion, much less user will get confused with PoE and PPPoE (but still has!).
PoE: Power over ethernet
PPPoE: PPP over ethernet. PPP is the protocol used in modem, before the broadband is built into every home
Everything over ethernet was a dream started about 10 years ago, it is now mostly replaced by another everything wireless dream. PoE is still not widely used after so many years.
Our first PoE design was from Huawei3Com, when it was ordering PA1688 based IP phones and need extra PoE. The extra support needs about 2 USD extra hardware cost with a few more components. Usually a manufacturer will build the PCB with PoE design on it but left PoE components unmounted until it is necessary, because PoE request is not common at all. The design was kept and optimized into AR1688 designs. For example, Digitmat GP1266 IP phone supports it with special orders and extra 20 RMB in sales price.
GP1266 has 2 RJ45 ports, those are same functioning switch ports. With the PoE version, only LAN1 will have power supply.
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