I would feed both wire of one pair with one polarity and ditto for the other.
But should work if you don’t need it for data.
From: Mathew Howard
Sent: Saturday, October 24, 2015 1:47 PM
To: af
Subject: Re: [AFMUG] B11 copper v fiber
Is there any reason you couldn't just feed DC directly into the ethernet port?
I'm thinking just wire the appropriate pairs in a cat5 cable directly to DC and
skip using a power injector.
On Sat, Oct 24, 2015 at 2:14 PM, Jaime Fink <ja...@mimosa.co> wrote:
We isolate Ethernet from power internally so even if the ESD protection we
put on Ethernet for any reason failed to protect the Ethernet PHY you should be
in good shape if you're using fiber. Should continue to take power.
Nonetheless we're looking at some clean solutions to adapt direct DC easily
in to avoid full PoE solutions at the top of the tower.
To Stefans point any converter would work too.
On Oct 24, 2015, at 10:17 AM, Jeremy <jeremysmi...@gmail.com> wrote:
I can see your point, but it seems that you are missing part of the idea of
why we run direct DC and fiber, to avoid ESD issues frying the sensitive
Ethernet components. We already have direct -48vdc and fiber sitting in our
tower box, ready for future expansion. You simply needed one additional small
connector and you could have made everyone happy. There are already a number
of manufacturers out there who not only support POE, but also have direct DC
connectors as well. AFAIK, The connector part is less than a buck. Consider
this my request for a future hardware revision that adds the small direct DC
connector as an option.
On Sat, Oct 24, 2015 at 10:34 AM, Jaime Fink <ja...@mimosa.co> wrote:
Yes it is powered via 802.3at PoE. You do not need Ethernet PHY
operational though once you've configured the SFP, it just accepts power
through the circuit at that point.
Unfortunately not everyone has gone to fiber yet so PoE is still needed
for some transitionally.
Jaime
On Oct 24, 2015, at 9:19 AM, Jeremy <jeremysmi...@gmail.com> wrote:
I do not see the direct DC connector on any of the marketing photos.
Do these still need to be powered via POE?
On Wed, Oct 21, 2015 at 4:40 PM, Jaime Fink <ja...@mimosa.co> wrote:
Thanks Mike.
Yes the aggregates Mike quoted are roughly correct as well, but…it’s
a bit different when you’re using our Auto-TDMA mode. Assuming you’re not fully
loaded, users running speedtests get results at a Gigabit in up and down
direction and around 1 ms RT latency, so it feels higher speed aggregate since
we’re adapting to actual usage on the fly. In other words we fill up the
underutilized directional demand with the direction that’s in demand (usually
downstream of course).
That’s opposed to locking down the MAC/PHY layer at 50/50 like FDD
does, or 75/25 TDMA modes, etc.
Jaime
From: Af <af-boun...@afmug.com> on behalf of Mike Hammett
<af...@ics-il.net>
Reply-To: "af@afmug.com" <af@afmug.com>
Date: Wednesday, October 21, 2015 at 2:33 PM
To: "af@afmug.com" <af@afmug.com>
Subject: Re: [AFMUG] B11 copper v fiber
Yes.
1200 - 1500 aggregate.
-----
Mike Hammett
Intelligent Computing Solutions
http://www.ics-il.com
----------------------------------------------------------------------
From: "TJ Trout" <t...@voltbb.com>
To: af@afmug.com
Sent: Wednesday, October 21, 2015 2:00:16 PM
Subject: Re: [AFMUG] B11 copper v fiber
Jamie;
Is the b11 based on 802.11 silicone?
Is the b11 capable of 750fd or 1500fd?
Thank you
On Wed, Oct 21, 2015 at 11:29 AM, Rory Conaway
<r...@triadwireless.net> wrote:
And Mike quits sending you nasty emails because you think copper
was sent to us by an evil entity from another dimension.
Rory
From: Af [mailto:af-boun...@afmug.com] On Behalf Of Adam Moffett
Sent: Wednesday, October 21, 2015 11:27 AM
To: af@afmug.com
Subject: Re: [AFMUG] B11 copper v fiber
Two reasons:
1) Peace of mind regarding future EMI problems
2) It's pretty sexy these days to tell people you have fiber to the
antenna,
On 10/21/2015 1:35 PM, Scott Vander Dussen wrote:
Mimosa recommends these SFP modules:
AFBR-5710APZï¿1Ž2 1.25 GBd MMF Transceiver for Gigabit Ethernet,
SFP, Bail de-latch, Ext Temp (-40 to 85C)
AFCT-5715ALZ 1.25 GBd SMF Transceiver with DMI for Gigabit
Ethernet, SFP, Std de-latch, Ext Temp (-40 to 85C)
FTLF8519P3BTL Fiber Optic Transmitters, Receivers, Transceivers
GigE 1x/2x FC, 2.129 Gb/s trnscvr, 550m
FTLF1318P3BTL Fiber Optic Transmitters, Receivers, Transceivers
1310nmFP GigE 1x FC 1.25Gb/s trnscvr10km
ï¿1Ž2
Assuming cable length and EMI are not issues, is there any
benefit to using fiber over copper?
ï¿1Ž2
`S
