This does not fix the problem, because both type 3 and type 4 still include single-sig class 6. Add to that, that this is trying to make the definition complex.
I suggest we stick to fixing the type 4 definition, and your suggestion below (on type 3) may provide the fix, but it isn’t readily apparent.
The problem is that dual-sig which classify as class 5 or 6 on a pairset are outside the type 4 definition. We should focus on including those into type 4.
-george
From: Andrea Agnes [mailto:andrea.agnes181@xxxxxxxxx]
Sent: Friday, October 20, 2017 4:01 AM
To: STDS-802-3-4PPOE@xxxxxxxxxxxxxxxxx
Subject: Re: [802.3_4PPOE] Type 4 PD
ok I agree
but dual signature PD Class 5 would became both Type 3 and Type 4.
I suggest accordingly modification of Type 3 definition:
1.4.418aa Type 3 PD: A single-signature PD that requests Class 1 to Class 6, or a dual-signature PD that requests Class 1 to Class 4 on both Modes during Physical
Layer classification, implements
Multiple-Event classification, and accepts power on both Modes simultaneously. (See IEEE 802.3, Clause 145).
2017-10-20 11:54 GMT+02:00 Lennart Yseboodt <lennartyseboodt@xxxxxxxxx>:
Hi Andrea,
That would make Class 5 and 6 single-signature PDs to be both Type 3
and Type 4.
Suggest:
1.4.418ac Type 4 PD: A single-signature PD that requests Class 7 or
Class 8, or a dual-signature PD that request Class 5 on at least one
Mode during Physical Layer classification, implements Multiple-Event
classification, is capable of Data Link Layer classification, and
accepts power on both Modes simultaneously. (See IEEE 802.3, Clause
145).
Not pretty,... but accurate.
Lennart
On Fri, 2017-10-20 at 11:50 +0200, Andrea Agnes wrote:
> The definition of type 4 is:
>
> 1.4.418ac Type 4 PD: A PD that requests Class 7 or Class 8 during
> Physical Layer classification, implements Multiple-Event
> classification, is capable of Data Link Layer classification, and
> accepts power on both Modes simultaneously. (See IEEE 802.3, Clause
> 145).
>
> That definition doesn't include Dual signature PDs because the
> Physical Layer classification is limited to Class 5.
>
> REMEDY : Changing the definition to:
> 1.4.418ac Type 4 PD: A PD that requests Class 5 or higher during
> Physical Layer classification, implementsMultiple-Event
> classification, is capable of Data Link Layer classification, and
> accepts power on both Modes simultaneously. (See IEEE 802.3, Clause
> 145).
>
> Proposed remedy is an extention of Type 4 PD, limited to Class 5 and
> Class 6 single signature only if PD is capable of Data Link Layer
> classification.
>
> Comments?
>
> I check if there are limits related to the Type and not to the Class
> value.
>
> Thanks
> Regards
> Andrea
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