I`m talking about DELL PowerConnect 6248 here.
For Module 1 bay you can buy PowerConnect 6xxx SFP+ Module supports up to two SFPs (no SFPs included)
Can i plug into these those Transceivers that are offered for front end SFP ports :
instead of what DELL offers for Modular Upgrade Bay 1: Optics: ??
That is 1Gbit instead of 10Gbit.