A note for clause 51 and 52

[Erik van Oosten <evoosten@xxxxxxxxxx>]

Hi,

I would like to see a note in the standard regarding the clock
accuracy.

The note is:
"Note: Compliance with ITU-T draft recommendation for approval
in February 2001, G.709 is accomplished with WAN operation and
20 ppm clock accuracy. This standard does not require 20 ppm."

Or after February:
"Note: Compliance with ITU-T recommendation G.709 v1 is
accomplished with WAN operation and 20 ppm clock accuracy.
This standard does not require 20 ppm."


The note should be placed, perhaps as footnote, at these
locations:
- page 202, line 47, section 51.3.1 "Required signals"
- page 208, line 9, section 51.5.2.3 "XSBI PMA_TX_CLK
  and PMA_TXCLK_SRC specification"
- page 227, line 38, table 52-8, section 42.41.1 "Transmitter
  optical specifications"


Rationale: It should be possible to transport a 10 GbE signal
in an optical backbone, over long distances, using the Optical
Transport Network (OTN). G.709 has no mapping for 100 ppm
signals.

Regards,
    Erik.


-- 
* Erik van Oosten
* Lucent Technologies, ONG, A-ONe, Network Architecture & CPSE
* mailto:evoosten@xxxxxxxxxx          * callto:+31 35 687 5227