RE: [802.3af] RE: Single port insertion time issue.
Brian & Yair,
I agree with your conclusion as well. The standard should restrict
itself to signals that are present on the ethernet cable - i.e. at the
PSE output port or PD input port. how a particular PD manufacturer
chooses to sequence the power-up of the PD's internal voltage rails is
outside the scope of the standard.
Principal Hardware Engineer
Bluesocket Limited, 1100 Parkway,
Solent Business Park, Whiteley, Fareham
Hampshire. PO15 7AB. United Kingdom.
Tel: +44 (0)1489 611698
Fax: +44 (0)1489 611612
[mailto:owner-stds-802-3-pwrviamdi@xxxxxxxxxxxxxxxxxx] On Behalf Of
Sent: 12 June 2001 14:01
Subject: [802.3af] RE: Single port insertion time issue.
I agree with your conclusion. Definition A - The time to
see 44-57 volts on the output of the PSE is the right time to measure.
You could also say 33-57 volts at the PD input port but I think
specifying at the PSE will be easier to test. By specifying any other
time we are getting too far into the PD and its operation, which I think
we need not do. The
time "from PSE voltage at the port to Data being sent" is best
left to implementation.
>From: Yair Darshan [mailto:YairD@xxxxxxxxxxxxxx]
>Sent: Tuesday, June 12, 2001 2:21 AM
>Subject: Single port insertion time issue.
>Attached short summary of the issue with the data that we have so far.
>Please review it in order to close this issue.
> <<Single Port Insertion Time -Considering System Aspects.pdf>>
>> PowerDsine Ltd. - Powering Converged Networks
>> 1 Hanagar St., P.O. Box 7220
>> Neve Ne'eman Industrial Zone
>> Hod Hasharon 45421, Israel
>Tel: +972-9-775-5100, Cell: +972-54-893019
>> E-mail: <mailto:yaird@xxxxxxxxxxxxxx>.
>> Visit PowerDsine at Networld+Interop 2001 Las Vegas
>> May 8-10, 2001, Booth: 8711,
>> Las Vegas Convention Center, Las Vegas, NV, USA