PLANET IGT-1205AT - Manual (Page 26)

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 10/100/1000BASE-T
The 10/100/1000BASE-T port comes with auto-negotiation capability.
It automatically supports 1000BASE-T, 100BASE-TX and 10BASE-T
networks. Users only need to plug a working network device into the
10/100/1000BASE-T port, and then turn on the Industrial Gigabit
Media Converter. The port will automatically runs in 10Mbps, 20Mbps,
100Mbps or 200Mbps and 1000Mbps or 2000Mbps after the negotiation
with the connected device.
Connecting the UTP cable
The 10/100/1000BASE-T port uses RJ45 socket -- similar to phone
jack -- for connection of unshielded twisted-pair cable (UTP). The IEEE
802.3 / 802.3u / 802.3ab Fast / Gigabit Ethernet standard requires
Category 5 UTP for 100Mbps 100BASE-TX. 10BASE-T networks can
use Cat3, 4, 5 or 1000BASE-T uses Cat5/5e/6 UTP (see table below).
Maximum distance is 100 meters (328 feet).
Note
Be sure the connected network devices support MDI/
MDI-X. If it does not support, then use the crossover
Category 5 cable.