Basiclly, you are doing the motion for a jump cancel but are canceling the JCable move into another move before the jump comes out. Later in the combo, you can RC a special in the air and either Double Jump or Air dash. An example with Sol is:
What is happening is that the standing close slash(5cs) can be Jump canceled. So, you input the command to JC it(8 or up). However, before the 5cs is canceled int a jump, you cancel to 5fs. Later, after RCing the Volcanic Viper and you are now in the air. Now, you do a jumping slash and due to the jump install yo used in the 5cs, you can jump cancel the j.s into more hits. I hope that helped. One more example fo May:
This is one of May’s Overhead kiss setups. You are hoding back the entire time before dong iruka-san. When you jump install the close slash, you use 7 or ub to keep the charge. After FRCing the dolphin, you can now airdash immediately.