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On S4148T-ON, the 48 x 10G ports on the front panel, Te-1/1/1 to Te-1/1/4824 and Te-1/1/31 to Te-1/1/54, are 10GBT RJ45 ports. However, on S4148F-ON, they are 10G SFP+ ports.
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On S4148T-ON, the 48 x 10G ports on the front panel, Te-1/1/1 to Te-1/1/4824 and Te-1/1/31 to Te-1/1/54, are 10GBT RJ45 ports. However, on S4148F-ON, they are 10G SFP+ ports.