I agree with you.
Yair
From: Geoff Thompson
[mailto:gthompso@xxxxxxxxxx]
Sent: Wednesday, June 08, 2005
4:52 PM
To: Yair Darshan
Cc: Geoff Thompson;
STDS-802-3-POEP@xxxxxxxxxxxxxxxxx
Subject: RE: [8023-POEP] 2P v 4P
and safety
Yair-
My opinion is that the question below needs to be a formal decision of the
group in session. We should put the question on the agenda of
"issues" for July.
Geoff
At 12:40 AM 6/8/2005 , Yair
Darshan wrote:
Hi Geoff
Thanks for the reply.
Yes, I understand that it is no law issue. When I use "legal" I meant
conformance to the relevant standards.
According to your last conclusion, I understand that splitting 4 pair cable to
2 outlets (each outlet gets 2 pairs) is valid scenario which PoEp has to
address too.
Now we will have the following PD options:
High Power 4P PD
Or two High Power 2P PD's
Or two IEEE802.3af PDs
Do we really want detect and power all options or we wish to detect and power
only 4P or 2P high power or single IEEE802.3af PD and only prevent damage to
two IEEE802.3af PDs connected to the same cable and leave the decision if to power
it or not to the system (implementation specific etc?).
Yair
From: Geoff Thompson [mailto:gthompso@xxxxxxxxxx]
Sent: Tuesday, June 07, 2005 6:56
AM
To: Yair Darshan
Cc: Geoff Thompson;
STDS-802-3-POEP@xxxxxxxxxxxxxxxxx
Subject: RE: [8023-POEP] 2P v 4P
and safety [Unscannable attachment] [Unscannable attachment]
Yair-
"legal" vs. common...
There is no matter of law involved, only conformance with voluntary standards.
If you insert a splitter into a single outlet then there is no conformance
issue.
If you split a cable to 2 outlets you are not conformant with TIA-568. The US has always
"required" that you run a single 4-pair cable to each RJ-45.
The International Standard, ISO/IEC 11801 does not require this. It was an
international fight of long standing. The German national body and a major
international connector manufacturer (US headquartered) bitterly opposed
mandating 4 pair per outlet. Therefore, 2 pair is allowed.
I hope this helps.
Geoff