@latt.net >
To: "Mike Hammett" < na...@ics-il.net >
Cc: nanog@nanog.org
Sent: Thursday, July 11, 2019 9:54:26 AM
Subject: Re: Time and Timing Servers
On Thu, Jul 11, 2019 at 09:29:46AM -0500, Mike Hammett wrote:
> There were a lot of NTP threads several weeks ago, but I di
On 7/15/2019 1:02 PM, Jay R. Ashworth wrote:
- Original Message -
From: "Majdi S. Abbas"
Not only are you dependant on Sprint if you go that route
(Verizon is already pulling the plug on CDMA this year.), it was never
any better than +/- 10 ms or so. You can get that via
- Original Message -
> From: "Forrest Christian (List Account)"
> A couple of thoughts here:
>
> 1) I know at some sites there is an external, shared, GPS antenna which is
> run through a distribution amplifier to clients. Worth checking into just
> in case it exists and they forgot
- Original Message -
> From: "Majdi S. Abbas"
> Not only are you dependant on Sprint if you go that route
> (Verizon is already pulling the plug on CDMA this year.), it was never
> any better than +/- 10 ms or so. You can get that via NTP pointed at
> the Internet.
Oh, is *that*
Subject: Re: Time and Timing Servers Date: Thu, Jul 11, 2019 at 09:11:13PM
+0200 Quoting Karsten Elfenbein (karsten.elfenb...@gmail.com):
> I think you are referencing their chip scale atomic clocks. Which are very
> frequency stable. But still need phase alignment. (Mobile UPS
Subject: Re: Time and Timing Servers Date: Thu, Jul 11, 2019 at 10:23:41AM
-0500 Quoting Mike Hammett (na...@ics-il.net):
> I'll look into Meinberg.
Meinberg are nice people with good hardware. They can do 2048KHz from
GPS and other timing signals, for instance. Then again, some router
vend
company/midwest-internet-exchange>
> <https://twitter.com/mdwestix>
> The Brothers WISP <http://www.thebrotherswisp.com/>
> <https://www.facebook.com/thebrotherswisp>
> <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg>
> ----------
> *From: *&
Intelligent Computing Solutions
Midwest Internet Exchange
The Brothers WISP
- Original Message -
From: ke...@contoocook.net
To: "Karsten Elfenbein" , "Mike Hammett"
Cc: "NANOG"
Sent: Thursday, July 11, 2019 3:49:35 PM
Subject: Re: Time and Tim
I know that many places hosting telecom gear provide "BITS Clock" this is a DS1 with timing.Ask about that, it's an alternative to providing your own.- Original Message -From: "Karsten Elfenbein" To: "Mike Hammett" Sent: Thursday, July 11 2019 03:22:01 PMSubject: Re: Time and Timing
Ethan O'Toole :
> > I'm looking for a device that can receive GPS inside a building without
> > the assistance of an external antenna (Frontier says they no longer
> > allow external antenna), will provide traditional NTP services, and will
> > provide a timing signal that my Metaswitch can work
I think you are referencing their chip scale atomic clocks. Which are very
frequency stable. But still need phase alignment. (Mobile UPS anyone?)
Maybe some peers can provide transparent or boundry clock support. Or
someone close by in the DC can add an antenna splitter.
Karsten
Mike Hammett
> On Jul 11, 2019, at 11:23 AM, Mike Hammett wrote:
>
> I'll look into Meinberg.
>
> I recent thread mentioned high-sensitivity receivers often allow GPS to work
> inside. Obviously "inside" has a lot of definitions.
>
> I will need this facility for the TDM timing signals. It's a central
Isn't a major problem with CDMA-based sources that the networks they depend on
are getting shut down?
If so, I would imagine there will be timing servers based on the
replacement cellular technology. Might ask EndRun or one of their
competitors about it.
- Ethan
Boyd"
To: "NANOG"
Sent: Thursday, July 11, 2019 10:03:02 AM
Subject: Re: Time and Timing Servers
> On Jul 11, 2019, at 10:29 AM, Mike Hammett wrote:
>
> I'm looking for a device that can receive GPS inside a building without the
> assistance of an external antenna (Fr
t;
Cc: nanog@nanog.org
Sent: Thursday, July 11, 2019 9:54:26 AM
Subject: Re: Time and Timing Servers
On Thu, Jul 11, 2019 at 09:29:46AM -0500, Mike Hammett wrote:
> There were a lot of NTP threads several weeks ago, but I didn't get an answer
> to my question amongst all of the other cha
On Thu, Jul 11, 2019 at 10:30 AM Mike Hammett wrote:
> There were a lot of NTP threads several weeks ago, but I didn't get an
> answer to my question amongst all of the other chatter.
>
> I'm looking for a device that can receive GPS inside a building without
> the assistance of an external
> On Jul 11, 2019, at 10:29 AM, Mike Hammett wrote:
>
> I'm looking for a device that can receive GPS inside a building without the
> assistance of an external antenna (Frontier says they no longer allow
> external antenna), will provide traditional NTP services, and will provide a
>
/twitter.com/mdwestix>
> The Brothers WISP <http://www.thebrotherswisp.com/>
> <https://www.facebook.com/thebrotherswisp>
> <https://www.youtube.com/channel/UCXSdfxQv7SpoRQYNyLwntZg>
> From: "Ethan O'Toole"
> To: "Mike Hammett"
> Cc: nano
On Thu, Jul 11, 2019 at 09:50:48AM -0500, Mike Hammett wrote:
> Isn't a major problem with CDMA-based sources that the networks
> they depend on are getting shut down?
Domestically, yes.
Not only are you dependant on Sprint if you go that route
(Verizon is already pulling the
On Thu, Jul 11, 2019 at 09:29:46AM -0500, Mike Hammett wrote:
> There were a lot of NTP threads several weeks ago, but I didn't get an answer
> to my question amongst all of the other chatter.
>
> I'm looking for a device that can receive GPS inside a building without the
> assistance of an
tt"
Cc: nanog@nanog.org
Sent: Thursday, July 11, 2019 9:46:24 AM
Subject: Re: Time and Timing Servers
> I'm looking for a device that can receive GPS inside a building without
> the assistance of an external antenna (Frontier says they no longer
> allow external antenna), will pro
I'm looking for a device that can receive GPS inside a building without
the assistance of an external antenna (Frontier says they no longer
allow external antenna), will provide traditional NTP services, and will
provide a timing signal that my Metaswitch can work with.
GPS inside a building
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