3750 twingig module

[ciscors]

I know a WS-C3750E-48PD-EF comes with 2 X 10GE (X2) ports.

Now, to connect it to another switch using 1GBPS, do I have to purchase both the X2 GBIC such as X2-10GB-SR as well as the Twingig module or can I simply buy the Twingig module?

[Joseph W. Doherty]

For fiber gig, just the TwinGig module (and SFPs you need). See http://www.cisco.com/en/US/products/ps7077/products_data_sheet0900aecd805bbee3.html for additional information.