Ethernet And Fast Ethernet Connections; Fiber-Optic Connections - Cisco Universal Broadband Router uBR10012 Hardware Installation Manual

Site Requirements
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The extent of your network and the distances between network interface connections depend in part on
the following factors:
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The distance and rate limits referenced in the following sections are the IEEE-recommended maximum
speeds and distances for signaling purposes. Use this information as a guideline in planning your
network connections prior to installing the Cisco uBR10012 router.

Ethernet and Fast Ethernet Connections

The maximum distances for Ethernet and Fast Ethernet network segments and connections depend on
the type of transmission cable being used. The terms 10Base-T and 100Base-T are industry shorthand
nomenclature for the following:
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Table 2-3
connections.
Table 2-3
Transceiver
Speed
10 Mbps
100 Mbps

Fiber-Optic Connections

The specifications for single-mode, fiber-optic transmissions are outlined in
Table 2-4
Characteristic
Transmitter output power –15 to –8 dBm
Receiver sensitivity
Do not exceed the specified distance limits.
Caution
Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
2-10
Distance limitations for each signal type
The specific cables you need to connect each interface
Any additional interface equipment you need, such as transceivers, hubs, switches, modems,
channel service units (CSUs), or data service units (DSUs)
Signal type
Signal speed
Transmission medium
10 Mbps transmission rate (10), or 100 Mbps transmission rate (100)
Using baseband technology (Base)
By means of twisted pair wires (T)
shows the maximum transmission distances between stations for Ethernet and Fast Ethernet
Ethernet and Fast Ethernet Maximum Transmission Distances
Cable Type
Category 3
Category 5
Fiber-Optic Transmission Characteristics
Permissible Value
–28 to –8 dBm
Transmission Mode Maximum Distance between Stations
Full and half duplex 328 ft (100 m)
Full and half duplex 328 ft (100 m)
Characteristic
Wavelength
Maximum span
Chapter 2 Preparing for Installation
Table 2-4.
Permissible Value
1261 to 1360 nm
9 miles (14.5 km)
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