09-25-2012 03:59 AM - edited 03-21-2019 06:20 AM
Hello,
I wanted to make simple PoE installation for SPA922 phone. I bought 48V adapter and connected negative
to pair 7 and 8 and positive to pair 4 and 5. But no luck, phone doesn't work, but blinks it screen when
disconnecting.
I was wondering if SPA922 supports passive PoE at all? I do not want to install PoE switch because
it is unnecessary in that location, PoE would be used only to allow wall mount of that phone.
Thanks!
09-26-2012 12:46 AM
Phone supports 802.3af standard Poe only.
Otherwise, you can use a 5V power supply, with passive PoE splitter if you want,
10-04-2012 03:00 AM
Hello,
Unfortunately you are not right . I used 48V power adapter and coneccted it to pairs 4,5 and 7,8 and it works. Also polarity doesn't matter. Works both ways. I just had to modify my passive PoE injector and it works just fine.
So yes - SPA 922 does support passive PoE.
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