B1 in lieu of H-1B

Can some get some insight about B1 in lieu of H1 category? recently US embassy visited our compnay for some breifing and I was part of that breifing and US representative categorically told that if some body wants to travel to U.S for short term work purpose, can file his/her visa in this category.

But, there is no such category when I login US visa interview scheduling website for visa interview.

Please revert if somebody has gone thru the process and applied for this visa category!