Questions - Setting up a SRAM board in S-100 / Altair system? Banks vs. Blocks?

I've been trying to familiarize myself with the soon-to-arrive SRAM board, reading through the documentation, googling this & that, etc. But I'm having trouble understanding a couple of concepts.. (You can d/l the manual for the board at http://nerp.net/~legendre/altair/ - "California Computer Systems 2016B". There's a pic there as well.) I get that the S-100 memory space is organized into 16 blocks of 4096 (8-bit) bytes, with the high-order digit in the memory address denoting the block number (0XXX-FXXX). This would correspond to address lines A12-A15. Likewise, I get that the SRAM board is organized into 4 blocks of 4096 bytes per block, and that with the corresponding DIP switches, I can individually map each 4K block into any of the 16 blocks in the memory space. Great, I know how to configure the memory blocks.. But now what is this about 'banks'? On p.33, section 3.3 the manual states "The 2016B is bank-selectable by bank port address and bank byte. Thus it is fully compatible with Cromemco, Alpha Micro and other port-bank-select systems. IT IS NOT COMPATIBLE WITH ADDRESS-SELECT SYSTEMS SUCH AS IMSAI." So what does that mean to me? There are apparently two parameters, Bank Byte and Bank Port Address - and I just can't get what they're about. How does a bank differ from a block, and why do I need to configure those settings? And is this card even compatible with the Altair - I don't know if it uses the former or latter (IMSAI) scheme.. As ever, thanks for your help!