For 450i I've been doing -1/2 +3/6 -4/5 +7/8. 450i will take either
polarity on any pair, 2 positive pairs, 2 negative pairs. BUT... Forrest
mentioned before that you MUST have -4/5 and +7/8 like old Canopy or
sync-over-power won't work, the radio simply won't see the sync pulse.
The other two pairs don't seem to matter much. All of the other 802.3at
compliant stuff I've worked with calls for -1/2 +3/6. That is the 3at
2-pair/30W standard. Those are also obviously your 10/100 data pairs. So
that's pretty much why I'm sticking with that for the other pairs. I
don't know if the -4/5 +7/8 thing matters with "Cambium Sync" on the
450m though. If it was me, I'd wire/pin it exactly the same as I do for
450i, because who the hell knows what would happen when they change
something in software.
And then PTP650. That's the standard 802.3at 4-pair/60W aka "POE Plus"
power polarity scheme. Pretty sure you must use that pinout because of
the remote default, PTP Sync and/or T1/E1 stuffs. I've never used any of
the Orthogon PTP stuff. Thought about it many times. It almost always
comes down to... f**k it, going licensed for about the same $$.
On 3/30/2017 5:28 PM, Bill Prince wrote:
So we've powered up our first PMP450M on the bench, and we set up the
power thusly:
* 1/2 (return)
* 3/6 (return)
* 4/5 +56V
* 7/8 +56V
Broke out the power for a PTP650, and it has the power thus:
* 1/2 (return)
* 3/6 +56V
* 4/5 +56V
* 7/8 (return)
I seem to recall (George?) saying the PMP450M almost doesn't care
which pairs are + and -, but I couldn't find the email where it was said.
Since we're putting the power for some of each of the above in the
same multi-port POE, I'm inclined to wire them all for the PTP650, and
let the PMP450M "figure it out", but I won't go there unless that is
really the case. Does someone have a document (or anything) that
explains what all the power options are for the PMP450M?
-bp
