| Thread Links | Date Links | ||||
|---|---|---|---|---|---|
| Thread Prev | Thread Next | Thread Index | Date Prev | Date Next | Date Index |
|
Agree with Drew. Have a few additional
comments on other reachs: For reach objectives, we should start with
customer based needs (for broad market potential) and only amend if an obvious
technical limitation with compelling economics can’t readily meet the broad
customer need. Specifically: - Long Reach probably should be set at
80km rather than 100km (as this is the common hut-to-hut amplifier spacing in
telecom) - While 50m does serve a useful portion of
the market (smaller datacenters and/or the size of a large computer cluster),
it is somewhat constraining as I’ve been lead to understand that the
reach needed in larger datacenters is continuing to out-grow the 100m meter definition
but the 100m definition at least serves the customer well. Certainly
10G-BaseT worked awfully hard to get to 100m (for Datacenter interconnect). - For both in-building reaches (50m &
300m; or 100m & 300m), the bigger issue which affects the PMD is the loss
budget arising from the number of patch panels. The shorter / datacenter
reach should include a budget for 1 patch panel. The longer / enterprise
reach should include a budget for 2 patch panels (one in the datacenter and 1
in the remote switch closet). From: Drew Perkins
[mailto:dperkins@xxxxxxxxxxxx] John, I suggest dividing Metro into Metro Short
Reach at 10 km (equivalent application to 10GBASE-LR) and Metro Intermediate
Reach at 40 km (equivalent application to 10GBASE-ER). Drew _____________________________ Drew Perkins Chief Technology Officer Infinera Corporation 1322 Bordeaux Drive Sunnyvale, CA 94089 Phone: 408-572-5308 Cell:
408-666-1686 Fax:
408-904-4644 Email: dperkins@xxxxxxxxxxxx WWW : http://www.infinera.com _____________________________ From: John DAmbrosia
[mailto:jdambrosia@xxxxxxxxxxxxxxxxxxx] All, We have had some conversation on the reflector regarding
reach objectives. Summarizing what has been discussed on the reflector I
see the following – Reach Objectives Long-Haul -->
100+ km Metro
--> 10+ km Intra-rack Inter-rack Horizontal runs Vertical risers Use this data to identify a single low-cost solution
that would address a couple of the reach objectives Other Areas During the course of the CFI there were individuals
who wanted Backplane Applications kept in for consideration, but I have not
heard any further input in this area. Are there still individuals who
wish to propose Backplane as an objective? John |