nanog mailing list archives
Re: Time and Timing Servers
From: "Majdi S. Abbas" <msa () latt net>
Date: Thu, 11 Jul 2019 10:54:26 -0400
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 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.
Unfortunately, L band satellite signals are incredibly weak by the time they reach the surface. It's very unlikely this is going to work for you (unless it's a wood framed single story building.) Generally, I try to ensure that a GNSS antenna is built into the contract, to avoid games like this. You have two options: A) Find a new colocation provider. This may already be on your to-do list for other reasons. B) Rely on the Internet for timing, using NTP or PTP from another location to backfeed the site, and use a box with a good stable oscillator to keep time (this can actually be a commercial time server with decent holdover characteristics. If you're just looking for alternatives to Microsemi, I highly recommend talking to the fine folks at Meinberg. --msa
Current thread:
- Time and Timing Servers Mike Hammett (Jul 11)
- Re: Time and Timing Servers Ethan O'Toole (Jul 11)
- Re: Time and Timing Servers Mike Hammett (Jul 11)
- Re: Time and Timing Servers Majdi S. Abbas (Jul 11)
- Re: Time and Timing Servers Jay R. Ashworth (Jul 15)
- Re: Time and Timing Servers Brielle Bruns (Jul 15)
- Re: Time and Timing Servers Mike Hammett (Jul 11)
- Re: Time and Timing Servers Ryan Wilkins (Jul 11)
- Re: Time and Timing Servers Ethan O'Toole (Jul 11)
- Re: Time and Timing Servers Ethan O'Toole (Jul 11)
- Re: Time and Timing Servers Eric S. Raymond (Jul 11)
- Re: Time and Timing Servers Mike Hammett (Jul 11)
- Re: Time and Timing Servers James R Cutler (Jul 11)
- Re: Time and Timing Servers Eric S. Raymond (Jul 11)
- Re: Time and Timing Servers Forrest Christian (List Account) (Jul 11)
- Re: Time and Timing Servers Jay R. Ashworth (Jul 15)
- Re: Time and Timing Servers Mike Hammett (Jul 11)