[AusNOG] SFP connector question

[Alex Samad - Yieldbroker]

Hi

In the market for a SFP+, 10G MMF LC, when to my normal web site and found 2
http://www.sfpex.com/407-10356 Dell 10GBASE-SR SFP+, LC Connector, 850nm Wavelength, Multi-mode Fiber (MMF), Up to 300 meter Distance
http://www.sfpex.com/407-10357 Dell 10GbE SR SFP+ Transceiver, 850nm, Duplex LC connector, Up to 300m over MMF


So apart from part numbers. The only difference I can see is one is marked as being duplex and the other by omission not.

Which has been confused I would have thought most SFP+ connectors would be full duplex, so I am at a bit of a loss to work out the difference.

Any thoughts ?

Alex