I need a serial cable to apply the firmware update for my 970, but retailers aren't always clear about whether their cables are straight-through or crossover. Is it safe to assume that female-female cables, which you could use between two PCs, are crossover type, but that male-female, which you could use as extension cables, are straight-through? Or, more to the point, are any male-female cables crossover?

Here's an inexpensive one: http://www.newegg.com/Product/Product.asp?Item=N82E16812117007,
but the description is identical for both male-female and female-female, even though they mention both laplink (crossover) and monitor (straight-through) use.

Thanks,
Bruce