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[802.3_100GEL] Proposed update to responses to comments #22, #23 and #24

Based on some offline consensus discussions please see below proposed updates to the responses  to comments  #22, #23 and #24. We will be discussing these on next Tuesday’s call.

 

If you have any questions please feel free to reach out to Dave, Mark  or myself.

 

Gary

 

 

Comment 24 :

 

PROPOSED ACCEPT IN PRINCIPAL

 

Table 140-6.

 

Change  the Average launch power (min) for 100GBASE-FR1 from -2.9dBm to -3.2dbm

 

Table 140-7.

 

Change the Average receive  power (min) for 100GBASE-FR1 from -6.9dBm to -7.2dBm

 

Section 140.10.1a:

 

Change:

"The 100GBASE-FR1 and 100GBASE-DR PMDs can interoperate with each other provided that the fiber optic cabling (channel) characteristics for 100GBASE-DR (see 140.10 and Table 140–12) are met"

to:

"The 100GBASE-FR1 and 100GBASE-DR PMDs can interoperate with each other provided that the fiber optic cabling (channel) characteristics for 100GBASE-DR (see 140.10 and Table 140–12) are met and the 100GBASE-FR1 transmitter  average power is greater than or equal to the value for average launch power (min) for 100GBASE-DR in Table 140-6."

 

[Gary]  This change essentially means that FR1 will only interoperate with  DR if the minimum average launch power of the FR-1 transmitter  is 0.3dB higher than the  informative value specified  in the spec.

 

 

Comment 22:

 

PROPOSED ACCEPT IN PRINCIPAL

 

Section 140.10a.2, Table 140-15.

 

Change the Max Loss for the direction “100GBASE-LR1 transmitter to 100GBASE-DR receiver” from 4.1dB to 3.9dB.

 

[Gary]  Note  that if the response to comment #8 is accepted this increases the Average launch power (min) for 100GBASE-LR1 by 0.1 dB, so therefore the max loss would change from 3.9dB to 4.0dB

 

Comment 23:

 

PROPOSED ACCEPT IN PRINCIPAL

 

See response to comment #24.  If comment #24 is accepted, then the  Average receive  power (min) for 100GBASE-FR1 will be changed from   -6.9dBm to -7.2dBm, and this is sufficient  for interop between a 100GBASE-LR1 transmitter   with an Average launch power (min) of -2dBm and a 100GBASE-FR1 receiver, with a maximum loss per section 140.10a.3. of 5.2dB.

 

 

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