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# White Rabbit Newsletter, May 2017
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Quite a lot has happened in the WR scene since the last newsletter. With
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[two
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companies](https://www.ohwr.org/project/white-rabbit/wikis/Switch#commercial-producers)
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producing switches, WR is now a true multi-vendor solution. We have also
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seen more open and proprietary hardware [incorporating WR
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support](https://www.ohwr.org/project/white-rabbit/wikis/WRCompanies).
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The [WR user
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list](https://www.ohwr.org/project/white-rabbit/wikis/WRUsers) keeps
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getting bigger and bigger. We also saw people starting to advertise
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WR-related jobs in the [Netherlands](https://www.ohwr.org/news/44),
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[two companies](/Switch#commercial-producers) producing switches, WR is
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now a true multi-vendor solution. We have also seen more open and
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proprietary hardware [incorporating WR support](/WRCompanies). The [WR
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user list](/WRUsers) keeps getting bigger and bigger. We also saw people
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starting to advertise WR-related jobs in the
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[Netherlands](https://www.ohwr.org/news/44),
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[Switzerland](https://www.ohwr.org/news/43) and
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[Germany](https://www.ohwr.org/news/42). WR was even on [Spanish
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TV](https://www.ohwr.org/news/42)\!
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| ... | ... | @@ -191,8 +188,8 @@ using SFPs with a tunable laser. |
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Tools for calibration have been developed.
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a) It is planned to produce a batch of "SFP+ Loop Back Modules"
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(https://www.ohwr.org/project/white-rabbit/uploads/f6d07a9f48cfbaf3846f0b9b985571e4/SFP__timing_calibration_module.pdf)
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a) It is planned to produce a batch of [SFP+ Loop Back
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Modules](https://www.ohwr.org/project/white-rabbit/uploads/f6d07a9f48cfbaf3846f0b9b985571e4/SFP__timing_calibration_module.pdf))
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used for absolute calibration. Currently the mechanical housing causes
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some issues that prevent us from production. When these issues are
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solved an announcement will follow via the white-rabbit-dev mailing list
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| ... | ... | @@ -299,7 +296,7 @@ development of the Peer-2-Peer mechanism for clock propagation, |
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PeerDelay for the delay measurement, the utilization of HSR tags in
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frames, and the Switch-over mechanism developed by CERN to recover from
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a node failure. Current progress and more information can be found at
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the OHWR WR-HSR webpage: https://www.ohwr.org/project/wr-hsr/wiki
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the [OHWR WR-HSR webpage](https://www.ohwr.org/project/wr-hsr/wiki)
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### WR upgrading for KM3NeT by Seven Solutions
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| ... | ... | @@ -320,3 +317,5 @@ links to synchronize, a new monitoring tool, and the possibility to |
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start up at least 150 final nodes in parallel with optimized start up
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times.
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-----
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