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Re: [802.3_4PPOE] 57V

The "-57V to 57V" can be read as requiring 114V must be tolerated.

My attempt:

Type 3 and Type 4 PDs shall withstand any voltage between 0 and 57V between any combination and any number of pairs.

Kind regards,

From: George Zimmerman [george@xxxxxxxxxxxxxxxxxxxxxxxxxxxxx]
Sent: Thursday, July 16, 2015 10:14
To: STDS-802-3-4PPOE@xxxxxxxxxxxxxxxxx
Subject: Re: [802.3_4PPOE] 57V

I agree that we don't want to remove the ambiguity in the existing text. I like, however the -57 to 57 v rather than 0 to 57 v at any polarity.
I don't think we should be writing it in terms of tests, but rather use the pin sets defined in the table, as Dan suggests.
This leaves me with Dans text, just without the 'on either mode a or mode b'

George Zimmerman
CME Consulting, Inc.

On Jul 15, 2015, at 10:06 PM, Dave Dwelley <ddwelley@xxxxxxxxxx> wrote:

Dan -

I’d prefer:

"Type 1 and Type 2 PDs shall withstand any voltage from 0V to 57V at the PI indefinitely without permanent damage.

Type 3 and Type 4 PDs shall withstand any voltage or combination of voltages from 0V to 57V across any combination of Mode A and Mode B conductor pairs (defined in Table 33-13) indefinitely without permanent damage.

These tests shall be run with the two conductors of each tested pair tied together.”

This preserves the ambiguous text from AT for Types 1 and 2 while making Types 3 and 4 clear and stopping the across-a-pair problem.


> On Jul 15, 2015, at 8:55 PM, Dan Dove <dan.dove@xxxxxxxxxxxxxxxxxx> wrote:
> Here is a proposed language regarding 57V.
> Feel free to respond, add, change as appropriate.
> <iihfbecf.png>
> Dan Dove
> Chief Consultant
> Dove Networking Solutions