[time-nuts] Re: Austron Oscillator Products - GSM

[John]

Ericsson GSM products did lock their master oscillator to the 2.048 mbps 
stream.

The master oscillator was 13 MHz, and I understand the RF was locked to 
that. As well as lots of timing bibs and bobs..

John


From: <john.haine at haine-online.net>

> Subject: [time-nuts] Re: Austron Oscillator Products
> To: "'Discussion of precise time and frequency measurement'"
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> GSM standards development started in 1982 though there was prior work in several labs.  Basic phy layer parameters were probably fixed by 1985 as the development cycle was quite long drawn out (especially for handsets as the "long pole" went through the tester!).  Networks were launched in 1991 so devices must have been in procurement several years before then.  When were these devices made?  I think they might have locked BTS clocks to the incoming PCM 2.048 Mbit/s links, not sure about the RF, though given the way all the numbers are interrelated they might have had to.
>