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Cisco uBR7100 Series and Cisco uBR7100E Series Universal Broadband Router Hardware Installation Guide
OL-5916-01
Chapter 3 Installing Cisco uBR7100 Series Universal Broadband Routers
Connecting to the Network
Connecting the Fast Ethernet Ports
The 10BASE-T/100BASE-TX Fast Ethernet ports support IEEE 802.3 and IEEE 802.3u specifications
for 10-Mbps and 100-Mbps transmission over unshielded twisted-pair (UTP) cables. These ports also
support autosensing and autonegotiation of the proper transmission mode (half duplex or full duplex)
with an attached device.
Each Fast Ethernet port has an RJ-45 connector that supports standard straight-through and crossover
Category 3 or Category 5 UTP cable:
• Use Category 3 UTP straight-through cables when connecting a 10BASE-T port to a hub.
• Use Category 3 UTP crossover cables when connecting to a PC or other Ethernet device.
• Use Category 5 UTP straight-through cables when connecting 100BASE-TX to a hub.
• Use Category 5 UTP crossover cables when connecting to a PC or other Ethernet device.
Note Cisco Systems does not supply Category 3 or Category 5 UTP RJ-45 cables; these cables are available
commercially. For more information, see the “Fast Ethernet Port Cables and Pinouts” section on
page C-4.
To connect the Fast Ethernet port to an Ethernet hub, use the following procedure:
Step 1 Verify that the Ethernet hub is properly connected to the rest of the LAN.
Step 2 Attach the appropriate cable directly to the receptacle on the router. (See Figure 3-10.)
Step 3 Attach the network end of the cable to the Ethernet hub or end station. (See Figure 3-10.)
Figure 3-10 Connecting the LAN Port to an Ethernet Hub
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Ethernet hub
Cisco uBR7100 series router
Straight-through
Ethernet cable
35826
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10BASE-T/100BASE-TX ports
Fast Ethernet 0/0
(RJ-45)
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