The above page gives conflicting specifications for Cat7 cable:
Cat-7 cabling supports frequencies of up to 600 Mhz and speeds of up to 10,000 Mbit/s. This is a big improvement on previous network cabling speeds (CAT 3: 10 Mhz, CAT 5: 100Mhz, CAT 6: 250 Mhz). Cat 7a cables can perform up to frequencies of 1000 Mhz and 40 Gbit/s.
CAT7 Cables Summary
CAT7 Cables can either be crossover or straight through cables
CAT7 cables are fairly new and becoming more popular
CAT7 Network Cables support frequencies of up to 250Mhz and speeds of up to 1000 Mbit/s
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