On 03/08/2012 11:21 PM, Bob Camp wrote:
Hi
Should be *very* interesting to watch if they try to legislate something
like that...
Indeed.
There are different telecom needs. CDMA isn't everything.
SDH/SONET goes under G.811, meaning within 1E-11 in frequency.
GSM should be within +/- 50 ppb, but long-term should be like SDH/SONET.
etc. etc.
Cheers,
Magnus
Bob
-----Original Message-----
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Poul-Henning Kamp
Sent: Thursday, March 08, 2012 5:10 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Loran in the US
In message<d20d95b53d5c40f5aca05df98fdb9...@vectron.com>, "Bob Camp"
writes:
If they are backing up GPS for telcom, then CDMA timing is the most likely
target. That gets them to 10 us max and< 1 us typical. Of course somebody
would have to buy the gear to actually *use* it to do any good... (yes I
could and have gone on and on about that topic).
Well, they do actually regulate telecoms, so they may simply be told that
it will be a condition for their licenses.
That happened with respect to power backups for cellular towers
after Katrina showed the inadequacy of 3 hours lead-acid backup.
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