Baicells supports PTP and Cambium has stated the 450i and 450m will get
support at some point.
A future software update for the RackInjector that would give us PTP
would be cool. Another thing I hope to see is PDU-like cards for direct
DC/SFP radios, including -48 support for high-power radios, even if the
card had to have its own master/input like the regular 5ch PDU.
Yeah, do the USB GPS. Then shut up and take my money. :) One of the
things I was actually thinking about playing around with is PTPd on
CentOS 7. Obviously it's just software, but it should be sufficient for
bench testing.
On 9/7/2017 5:39 AM, Forrest Christian (List Account) wrote:
I am mindful about 1588v2 - I just don't have an active market to sell
to right now, and the level of engineering there is a bit more than I
want to bite off unless I have a known market.
The usb to GPS device is easy to do, and definitely in the category of
a weekend project, which is why it is likely to just happen.
On Wed, Sep 6, 2017 at 10:22 PM, George Skorup
<[email protected] <mailto:[email protected]>> wrote:
I'm down for buying a handful whenever you decide to make something.
Output from the RackInjector management port and/or a dedicated
device could be extremely useful. Hmm. How about ieee1588v2 PTP?
That would be cool.
On 9/6/2017 10:34 PM, Forrest Christian (List Account) wrote:
My rough draft here is a USB-serial interface with an isolated
DC-DC converter and a isolated usb-serial interface, so you are
at least mostly electrically and opto isolated from the SBJ.
Plug into a USB and then power the SBJT. So USB to a small box,
then cat5 to the SBJ. This is a small enough and fun project
that it will probably just happen and fairly quickly - I need a
few of these after the nightmare of the rackinjector (think of it
as a working vacation).
I've also had on the todo a NTP all in one appliance, probably in
the SBJ or SB12 box. That same code would make it into the
rackinjector and any followon similar products. There are quite
a few things ahead of it on the roadmap though...
On Wed, Sep 6, 2017 at 2:45 PM, George Skorup
<[email protected] <mailto:[email protected]>> wrote:
Apparently there are USB sticks that are basically a GPS
receiver and a PL2303 for $30-40. So you get the date/time.
Cool. Then they take the 1PPS output to blink a f***ing LED.
Really!? I was reading some blogs where folks have opened
them up and wired a super tiny jumper from 1PPS to DCD. That
was about 5-6 years ago using older SiRF receivers, too. Meh.
A GPS+GLONASS SBJ basic and USB kit would be pretty cool.
Could the USB interface also power the box, up to say 20-25
feet? The other thing is, all of the machines I'm working
with have a serial port. So maybe just skip the USB altogether?
I was thinking, maybe take the daisy-chain output from a
SyncInjector/PowerInjector/RackInjector since those switch
the pipe/box to NMEA anyway, but I don't think I'd want a
path from the tower-mounted gear to server(s). And other
funky stuff like noise making it into the timing for the
radios would be ungood.
On 9/6/2017 2:10 AM, Forrest Christian (List Account) wrote:
I could tell you how to wire a syncbox junior up to a usb
port if you'd like. Requires a TTL level usb to serial cable.
I'd you wait a month or so until the gps+glonass version is
out it well even speak nmea. Heck, now I think about this
it might make a good product.... syncbox basic plus a USB
dongle.
On Sep 5, 2017 8:19 PM, "George Skorup"
<[email protected] <mailto:[email protected]>>
wrote:
I've got a few CentOS machines running around the
network doing various tasks, one being NTP for radios,
routers, switches, etc. I've been having some issues
with us.pool.ntp.org <http://us.pool.ntp.org> lately. I
switched to time-(a,b,c,d).nist.gov <http://nist.gov>.
Apparently those are pretty busy.
So is anyone else using GPS to feed NTPd? From what I've
been reading, I guess I need a 1PPS capable receiver.
Does that exist in a simple USB package? That would be
ideal, preferably with an SMA female for an external
antenna where needed. Looks like none of the cheap shit
I'm finding on Amazon has PPS output.
--
*Forrest Christian* /CEO//, PacketFlux Technologies, Inc./
Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602
[email protected] <mailto:[email protected]> |
http://www.packetflux.com <http://www.packetflux.com/>
<http://www.linkedin.com/in/fwchristian>
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--
*Forrest Christian* /CEO//, PacketFlux Technologies, Inc./
Tel: 406-449-3345 | Address: 3577 Countryside Road, Helena, MT 59602
[email protected] <mailto:[email protected]> |
http://www.packetflux.com <http://www.packetflux.com/>
<http://www.linkedin.com/in/fwchristian>
<http://facebook.com/packetflux> <http://twitter.com/@packetflux>
