RE: [RPRWG] 802.17 Outline: Stratum Clock distribution?
Stratum Clock Distribution to me means ANSI T1.101 Synchronization hierarchy
standard. This is very different to time-of-day clocks. Synchronization is
necessary from PSTN (TDM voice) perspective. It may also be required for a
RPR network supporting circuit emulation services (there may be other ways
to do it without synchronization). However, this is an implementation
specific issue which should not be part of the RPR standard. Individual
vendors may choose to do it as their differentiator.
I was not aware of stratum clock discussion in the last meeting. Can any
else shed some light?
Regards,
James Chan
-----Original Message-----
From: David James [mailto:djz@xxxxxxxxxxx]
Sent: Wednesday, November 21, 2001 10:14 AM
To: Jeanne.De_Jaegher@xxxxxxxxxx
Cc: stds-802-17@xxxxxxxx
Subject: RE: [RPRWG] 802.17 Outline: Stratum Clock distribution?
Jeanne,
Some physical layers have no provisions for accurately
synchronizing time-of-day clocks (GMT like clocks) of
clock slave's to clock masters.
For physical layers without such services, this clause
describes how such time-of-day clocks can be accurately
synchronized by MAC-level services.
From IEEE Std 1394 Serial Bus experiences, as well as
the telecom industry as a whole, the value of synchronous
transfers is greatly increased if time-of-day clocks
can also be synchronized.
DVJ
David V. James, PhD
Chief Architect
Network Processing Solutions
Data Communications Division
Cypress Semiconductor
110 Nortech Parkway
San Jose, CA 95134
Work: +1.408.942.2010
Cell: +1.650.954.6906
Fax: +1.408.942.2099
Work: djz@xxxxxxxxxxx
Base: dvj@xxxxxxxxxxxx
> -----Original Message-----
> From: owner-stds-802-17@xxxxxxxxxxxxxxxxxx
> [mailto:owner-stds-802-17@xxxxxxxxxxxxxxxxxx]On Behalf Of
> Jeanne.De_Jaegher@xxxxxxxxxx
> Sent: Wednesday, November 21, 2001 3:17 AM
> To: stds-802-17@xxxxxxxx
> Subject: [RPRWG] 802.17 Outline: Stratum Clock distribution?
>
>
>
>
>
> Good morning,
>
> Can someone tell me what the section over Stratum Clock
> Distribution covers?
>
>
> Thank's
>
> Jeanne
>
>
>