From: Bill Janssen <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Re: World's most accurate PC clock! Date: Mon, 04 Jul 2005 09:11:41 -0700 Message-ID: <[EMAIL PROTECTED]>
Bill, > Magnus Danielson wrote: > > >Much important stuff clipped > > > >1,544 MHz, 2,048 MHz, 19,44 MHz, 51,84 MHz and 155,52 MHz is standard telecom > >frequencies. The two first ones are the traditional PDH rates (and thus > >synchronisation frequencies), the third is the normal SDH/SONET reference > >oscillator frequency, but 51,84 MHz and 155,52 MHz is more commonly used for > >bit-clock reference. > > > >Cheers, > >Magnus > > > Magnus > Off topic I guess but wondering if you are involved with the T1X1 standards > and if so what is happening with the synchronization group No, I am not involved in the T1X1 standards. However, I would say that the pace of work in both T1X1 and ETSI on SONET/SDH synchronisation has lowered significantly to the best of my knowledge. Not that there isn't problems to be solved, more that other things seems to be more important these days. It has now been revamped to the ATIS OPTXS. Last published document is from 2003. I saw what happend to ETSI TM1. The last thing they got out was a really good tutorial on synchronisation, but the infrastructure fell apart as members where cutting costs and moving their attention to other places. I had to move my workitems to another part of ETSI since TM1 was basically closing shop and I was the last one out. They staid in a slumber and there seems to be a very minimal level of activity now. Any particular issue you are wondering about or just in general? Cheers, Magnus - didn't fiddle all that much with the SDH sync back then _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
