Twinax trivia check (was Re: Is there such a thing as a 10GBase-T SFP+ transciever)

2014-02-02 Thread Larry Sheldon
On 2/1/2014 10:40 PM, Jima wrote: +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. I thought Twinax was an IBMish MILSPEC term. -- Requiescas in pace o email Two identifying characteristics

Re: Twinax trivia check (was Re: Is there such a thing as a 10GBase-T SFP+ transciever)

2014-02-02 Thread joel jaeggli
On 2/2/14, 7:30 AM, Larry Sheldon wrote: On 2/1/2014 10:40 PM, Jima wrote: +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. I thought Twinax was an IBMish MILSPEC term. twinax could refer to a specific

Re: Twinax trivia check (was Re: Is there such a thing as a 10GBase-T SFP+ transciever)

2014-02-02 Thread Jay Ashworth
- Original Message - From: joel jaeggli joe...@bogus.com I thought Twinax was an IBMish MILSPEC term. twinax could refer to a specific technology or to the presence of dual inner conductors e.g. in contrast to coax or triax. Rather specifically, Twinax refers to cable with 2

Re: Twinax trivia check (was Re: Is there such a thing as a 10GBase-T SFP+ transciever)

2014-02-02 Thread Bryan Tong
These cables are most commonly known as Direct Attach Copper SFP+ On Sunday, February 2, 2014, Jay Ashworth j...@baylink.com wrote: - Original Message - From: joel jaeggli joe...@bogus.com javascript:; I thought Twinax was an IBMish MILSPEC term. twinax could refer to a

Re: Twinax trivia check (was Re: Is there such a thing as a 10GBase-T SFP+ transciever)

2014-02-02 Thread Jeff Kell
On 2/2/2014 4:03 PM, Bryan Tong wrote: These cables are most commonly known as Direct Attach Copper SFP+ The big issue appears to be that these are not always consistently functional crossing vendor lines (sometimes product lines within the same vendor). There does not appear to be any

RE: Twinax trivia check (was Re: Is there such a thing as a 10GBase-T SFP+ transciever)

2014-02-02 Thread Murphy-Olson, Daniel E.
Most of the switch vendors have an official compatibility list, but I've found that generally the most common compatibility issue is active vs passive twinax. Brocade edge switches and nics are normally active only, which seems to come up a lot - because most short cables are passive unless

Re: Twinax trivia check (was Re: Is there such a thing as a 10GBase-T SFP+ transciever)

2014-02-02 Thread Brian Loveland
We've worked through the same issues with Brocade/Intel, although we found that even though Brocade specs active only, our ICX switches don't reject passive cables, although oddly the Intel branded passive cables show up as UNSUPPORTED (but FCI and Molex ones from Digikey show up as the correct