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Bruce, I too will be out of the country next week. Please put me on the e-mail list so that I will see conference call info on this topic. Please pass along to the group that BellSouth strongly supports an extended temperature range requirement. BellSouth would like to see these numbers called out in the specification as normative numbers (please keep in mind that BellSouth and many of the other service providers think in terms of ambient temperature and not case temperature...however it would seem that these two items are strongly related). I will also attach the short temperature presentation that I displayed at the Vancouver meeting. This is the PowerPoint that we provide to all of our vendors when they come into the lab regarding temperature requirements (this is in addition to some GRs that we point to ... GR-63 CORE and GR-1089 I believe). Hope this helps, B.F. Brian Ford BellSouth Telecommunications Science and Technology - Exploratory Development Brian.Ford@xxxxxxxxxxxxx +1 404 332 2217 -----Original Message----- From: Bruce Tolley [mailto:btolley@xxxxxxxxx] Sent: Thursday, January 16, 2003 2:59 PM To: email@example.com; firstname.lastname@example.org Subject: [EFM] Moving forward on extended temperature range optics Piers and all I gave my self the action to help move forward the outstanding issue regarding extended temperature ranges for P2P and P2MP optics We have an objective to include in our specification of PHYs, support for extended temperature range optics The task force has in the past passed motions to specify EFM optics at -40 to +85 C Network operators have on multiple occasions communicated the requirement for extended temperature solutions. As recently as the Vancouver meeting, several box vendors (including me)b communicated the requirement for extended temperature range optics. We need to agree on a path to move forward. So if interested parties want to forward to me their email addresses, I will host a conference call next week dedicated to this issue. I think we need to focus on a test specified in each PMD clause, to agree on the ranges for OLT and ONU optics, to consider the possible special case of bidis that include 1550 nm DFBs, and to identify any PMD that might only need to be supported at standard, commercial temperatures. thanks Bruce Tolley Cisco Systems At 04:11 PM 1/8/2003 +0100, piers_dawe@xxxxxxxxxxx wrote: >G.983.3 refers to ETS 300 019. This is a very readable series of >documents from the European Telecommunications Standards Institute, giving >a classification of environmental conditions, e.g. weatherprotected >locations, non-weatherprotected, underground. It uses four classes of >climatic conditions: > "applies to most of Europe" > extended > extremely cold > extremely warm dry > >And even better, up-to-date drafts are available on the web, e.g. at >http://webapp.etsi.org/action%5COP/OP20030321/en_3000190104v020101o.pdf . > >It is not the business of 802 to pick between these classes but we can >refer the readers of our standard to this information. > >ITU-T and ANSI T1 do not have similar documents. > >Both G.983.3 and refer to IEC 60721, classification of environmental >conditions. > >IEC 60721-3-4 - Ed. 2.0 Classification of environmental conditions - Part >3: Classification of groups of environmental parameters and their >severities - Section 4: Stationary use at non-weatherprotected >locations 1995-01 is available for CHF99 at >https://domino.iec.ch/webstore/webstore.nsf/artnum/019208 . > >Piers Bruce Tolley Senior Manager, Emerging Technologies Gigabit Systems Business Unit Cisco Systems 170 West Tasman Drive MS SJ H2 San Jose, CA 95134-1706 internet: btolley@xxxxxxxxx ip phone: 408-526-4534 ***** "The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential, proprietary, and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and delete the material from all computers."
BellSouth Temperature Requirements.ppt