Re: Is there such a thing as a 10GBase-T SFP+ transciever

[Jima <nanog () jima us>]

 +1.  Cisco calls them Twinax, HP calls them DACs.  I don't know what 
anyone else calls them as it hasn't come up in conversation for me.

 Cisco appears to offer them in 1, 1.5, 2, 2.5, 3, and 5 meter passive, 
as well as 7 and 10 meter active.  HP has them in 1, 3, 7, 10, and 15 
meter; no idea what the passive/active breakdown might be (they don't 
appear to offer that information as freely).  I've mostly used the 
3-meter HP DACs so far, and I've been rather happy with them, 
particularly the cost savings under 2x 10gbit SFP+ fiber transceivers.

     Jima

On 2014-01-30 19:25, Chris Balmain wrote:
> You may wish to consider twinax for short distance 10G over copper with
> SFP+ at both ends
>
> http://en.wikipedia.org/wiki/Twinaxial_cabling#SFP.2B_Direct-Attach_Copper_.2810GSFP.2BCu.29
>
>
> Typically marketed as "direct-attach" (you can't remove the cables from
> the transceivers, it's all integrated)
>
> On 31/01/14 12:26, james jones wrote:
> > I would like to know if anyone has seen one of these? If so where?
> > Also if
> > they don't exist why? It would seem to me that it would make it a lot
> > easier to play mix and match with fiber in the DC if they did. Would
> > be so
> > hard to make the 1G SFPs faster (trying to be funny here not arrogant).
> >
> >
> > -James