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  1. Member
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    #1

    Default Silly question i know about cabling

    When you say 1000baseT does this mean 1000mb = 1 gigabyte ? If that is the case then any word with the 1000 base i can safely say it it is gigabyte ethernet ?

    Thanks
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  3. Questionably Benevolent Moderator Slowhand's Avatar
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    #2
    No, network speeds are measured in bits while file sizes are measured in bytes, (remember, there are 8 bits in a byte.) 1000BaseT is a megabit connection; a megabyte is 1,000 kilobytes, which is 1,000 bytes of data.

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    #3
    From my notes...

    Ethernet Type IEEE Name Common Name Speed Cable Type Maximum Length
    10BASE-T 802.3 Ethernet 10Mbps TIA CAT3 or better.
    Two pair
    100m
    100BASE-T 802.3u Fast Ethernet 100Mbps TIA CAT5 UTP or better.
    Two pair
    100m
    1000BASE-T 802.3ab Gigabit Ethernet 1000Mbps TIA CAT5e UTP or better.
    Four pair
    100m
    10GBASE-T 802.3an 10 Gig Ethernet 10Gbps TIA CAT5e UTP or better.
    Four pair
    100m
    1000BASE-SX 802.3z Gigabit Ethernet 1000Mbps Multimode Fiber. 50-micron 550m
    1000BASE-LX 802.3z Gigabit Ethernet 1000Mbps Multimode Fiber. 50- or 62.5 micron 550m
    1000BASE-LX 802.3z Gigabit Ethernet 1000Mbps 9-micron single-mode fiber 5000m

    Mbps = Megabits per second.

    I don't think there are any errors, but I'm sure that someone will correct me if I'm wrong.
    Last edited by rob42; 12-21-2016 at 01:19 AM.
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  5. Senior Member AndersonSmith's Avatar
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    #4
    Quote Originally Posted by Slowhand View Post
    No, network speeds are measured in bits while file sizes are measured in bytes, (remember, there are 8 bits in a byte.) 1000BaseT is a megabit connection; a megabyte is 1,000 kilobytes, which is 1,000 bytes of data.
    Yes, EXACTLY what Slowhand said!
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    #5
    At least he didn't ask what "base" means...
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    #6
    Quote Originally Posted by Slowhand View Post
    ...1000BaseT is a megabit connection...
    I don't think this is correct.

    The way I see it is...

    1 Megabit = 1,000,000 (1 million)
    10 Megabits = 10,000,000 (10 million)
    100 Megabits = 100,000,000 (100 million)
    1000 Megabit = 1,000,000,000 (1000 million)
    1 Gigabit = 1,000,000,000 (1000 million)

    So, 1000BASE-T = 1000 million bits per second, which is a 'Gigabit', not a 'Megabit'
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