Re: [TICTOC] Enterprise Profile

[John Fletcher <[e-mail]>]

I'd also like to ask that you don't prohibit the Alternate Timescales option.  This is potentially useful to distribute "local time" (your time-zone and dst) and there doesn't seem to be any need to prohibit it.

John
________________________________
From: [e-mail] [[e-mail]] on behalf of John Fletcher [[e-mail]]
Sent: 25 October 2013 11:01
To: Douglas Arnold
Cc: [e-mail]
Subject: Re: [TICTOC] Enterprise Profile

Doug,

I would be interested to know the circumstances when you see the maximum phase adjustment information being used.

Some comments:

In section 6, you say, “In all three of the delay measurement modes…”.  At that point in the text you have not yet mentioned multicast, hybrid and unicast modes so it’s not clear which modes you are referring to.

In section 9, you say, “Slaves SHOULD NOT Synchronize to a Rogue Master.”  It’s not clear how a slave would know that a master is rogue; presumably it would need to examine the announce messages of all masters and do its own BMCA evaluation.  A more realistic “rogue” master would probably meet the BMCA criteria for selection.

In section 12, “Alternative Time Scales” should be “Alternate Timescales”.


Regards,
John Fletcher

From: [e-mail] [mailto:[e-mail]] On Behalf Of Douglas Arnold
Sent: 25 October 2013 01:35
To: [e-mail]
Subject: [TICTOC] Enterprise Profile

Hello Everyone,

Attached is an updated version of the Enterprise profile.  Sorry I missed the upload deadline for  the Vancouver meeting.  If you get a chance to look at it before then I will be there and would love to discuss it.

Summary of changes:

I also changed the TLV format to fit the latest proposal in the 1588 revision.

I added a statement about not going into the master state unless one had a current UTC offset.

I added to the TLV fields to indicate maximum phase correction over a sync cycle.

--
Doug Arnold
Principal Technologist
JTime! Meinberg USA
[phone]





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