Hi Jouko, What do you mean by Infiniband only ? As mentioned before we are using them at 4 lanes * 3.125 Gbps not Infiniband's 4 * 2.5 Gbps.
Matt > Hi Matt, > > I did some research about the fiber optic links some months ago. > > It appears that the Fujitsu things are infiniband-only, they cannot be > connected to 10 Gbps Ethernet switches directly. Or more precicely, need > another such device to connect to a copper port. > > I did try to convince the roach people to design a footprint for a > mainstream fiber optic transceiver, didn't succeed. As far as I know there > are about five 10GBE transceiver standards around, three of which have > same signals as CX4. So it would have been a zero-cost option, just add > some wires in the PCB. > > Cheers, > Jouko > > "Life is pretty simple: You do some stuff. Most fails. Some works. You do > more of what works. If it works big, others quickly copy it. Then you do > something else. The trick is to do something else." > > > On Thu, 12 Jun 2008, Matt Dexter wrote: > >> Hi, >> >> We are starting to run some tests with one of the Cognitive Radio >> group's >> Fujitsu o-microGigaCN (o-MGC) fiber optic links. This unit is on >> loan and will need to be returned in a bit. >> >> This consists of: >> Part number Serial number description >> FPD-010R008-OE 01B-06160045 CX4/FO transceiver, 850nm VCSEL, 3.3V >> FPD-010R008-OE 01A-05430042 CX4/FO transceiver, 850nm VCSEL, 3.3V >> FOC-CC10004 50/125um MMF 850nm wavelength approx 50ft >> >> optical interface is MPO connector >> electrical interface is microGiGaCN >> >> http://www.fujitsu.com/us/services/edevices/components/connectors/copper-modules >> >> These units are reportedly quite expensive; maybe $1K per link >> (2*$400+200). >> >> Shortly I'll work on getting revised information but back in April of >> 2005 >> I was told: >> Bob Thornton is the sales contact for the Fujitsu modules. His contact >> information is: >> Director of Marketing >> Fujitsu Components America, Inc >> bthorn...@fcai.fujitsu.com >> 408-745-4932 >> www.fcai.fujitsu.com >> He will be receiving the first production modules in the next several >> weeks. He estimates the prices to be: >> module $350; >> 3m patch cord $90. >> Lead time: 2-3 weeks. >> >> The attachments were provided, back in 2005, by Fujitsu. >> I haven't found them online. >> >> >> >> Oren is running through some tests now. Additional results will be >> distributed later. For now >> iBob->iBob seems aok. >> >> Connecting to the front of the BEE2s doesn't seem safe without >> re-machining the lower edge of the BEE2 chassis' front opening. BWRC >> folks designed this lower edge to be a "pinch bar" of sorts to help >> hold >> the CX4 cable assemblies in place. The FO unit becomes taller sooner >> than the WLGore CX4 cable assembly for example and thus the angle into >> the BEE2's infiniband 4x connectors looks to be too steep. We didn't >> try to force it in. >> >> There is no "pinch bar" of any type in the back of the chassis so there >> are no obstructions. Oren is trying those out now. >> >> iBob-> back of BEE2 OK >> back of BEE2 -> back of BEE2 OK >> back of BEE2 -> iBob OK >> >> Over the next few days we plan on testing more extensively. >> >> Matt >> >> ------------------------------------------------------------------------ >> >> Date: Fri, 2 May 2008 11:53:41 -0400 (EDT) >> From: John Ford <jf...@nrao.edu> >> To: Matt Dexter <mdex...@berkeley.edu> >> Cc: David MacMahon <dav...@astro.berkeley.edu>, >> casper@lists.berkeley.edu >> Subject: Re: [casper] iBOB to iBOB over 15m CX4 >> >>> On of the non-Casper BWRC groups has a box of the fiber optic cables >>> Dave mentions. We got the OK to borrow a couple to exercise them for >>> a few days. This is high priority on the to-do list. >>> >>> Note as we as allowing longer distances the fiber optic cables >>> may be easier to route than the copper versions. Shorter radius of >>> curvature and smaller diameter. >> >> Hi Matt. Could you post the vendor or other info on these cables? I'm >> interested in using something similar. >> >> Thanks. >> >> John >
