JavaCard OS

I have learned some information about sending extended APDU form this webpage.

From the explanation below, does it mean I only can send extended APDU to the java card with protocol T=1? And my smart card reader must support extended APDU also. Am I right?

And use ENVELOPE COMMAND with protocol T0 to support extended APDU.
For more details, see ISO7816-4, Section "Case 4E" of chapter "Command-response pair transmission by T=0".