Using multiple Lab Cradles or EasyLinks on a TI-Nspire handheld is generally not possible and not recommended.

The TI-Nspire software does not support multiple Lab Cradles connected to a computer. When a second Lab Cradle is connected to a computer, it will be ignored by the software.

The TI-Nspire software does support multiple EasyLink/Go!Link interfaces connected to the same computer. Because of power issues, it is recommended that these interfaces be connected directly to the computer. If a USB hub is required, a powered hub is preferred; however, we don’t recommend this combination.

See Also:
Can I use Go! and Easy products at the same time as the TI-Nspire Lab Cradle?
Can I connect an EasyTemp, EasyLink or CBR 2 directly to a TI-Nspire Lab Cradle?