https://community.hpe.com/t5/switches-hubs-and-modems/j4859-gbic/m-p/4254036#M15327 Can anyone tell me the difference between the <BR />J4859B &amp; J4859C GBICs?<BR /><BR />Darren Mon, 18 Aug 2008 17:01:08 GMT Darren Etheridge_2 2008-08-18T17:01:08Z https://community.hpe.com/t5/switches-hubs-and-modems/j4859-gbic/m-p/4254036#M15327 Can anyone tell me the difference between the <BR />J4859B &amp; J4859C GBICs?<BR /><BR />Darren Mon, 18 Aug 2008 17:01:08 GMT https://community.hpe.com/t5/switches-hubs-and-modems/j4859-gbic/m-p/4254036#M15327 Darren Etheridge_2 2008-08-18T17:01:08Z https://community.hpe.com/t5/switches-hubs-and-modems/j4859-gbic/m-p/4254037#M15328 The C versions can be sourced by HP from multiple SFP vendors, the part number was rolled since it required a firmware update on some products to use the newer C revisions. <BR /><BR />Apart from that there is no functional difference.<BR /> Mon, 18 Aug 2008 23:29:57 GMT https://community.hpe.com/t5/switches-hubs-and-modems/j4859-gbic/m-p/4254037#M15328 Matt Hobbs 2008-08-18T23:29:57Z