I am looking at deploying the 4948E switch in my enviroment to replace a 6504 with Sup720 10gig blades. The 6504 is using the XENPAK-10GB-LX4 to connect to my core and the core is using the same Xenpak. I don't want to replace the Xenpaks in my core if I don't have to.The 4948E uses STP+ and there isn't an SFP+ LX4 module. It looks like the XENPAK-10GB-LX4 should connected to the SFP-10G-LRM. Am I correct?