Universal Broadband Router Hardware Installation Guide
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Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
OL-18259-01
Chapter 1 Cisco uBR10012 Universal Broadband Router Overview
Network Uplink Cards
When shorter distances of single-mode fiber are used, it may be necessary to insert an inline optical
attenuator in the link, to avoid overloading the receiver. A 5-decibel (dB) or 10-dB inline optical
attenuator should be inserted between the fiber optic cable plant and the receiving port on the
GLC-ZX-SM at each end of the link whenever the fiber optic cable span is less than 25 km.
• 1000Base-T SFP— Support for the GLC-T, 1000Base-T SFP module is introduced in Cisco IOS
Release 12.3(23)BC1.
The Cisco GLC-T, 1000Base-T SFP module connects a Cisco Gigabit Interface Converter (GBIC)
port to Category 5 wiring via a standard RJ-45 interface. The maximum Category 5 wiring distance
is 100 m. The module provides with an option of connecting to a backhaul network interface. For
more information on the Cisco GLC-T 1000Base-T SFP, see
http://www.cisco.com/en/US/docs/routers/7200/install_and_upgrade/gbic_sfp_modules_install/50
67g.html
Note The required line card SFP GBIC is shipped already installed in the line card. Cisco sells individual SFP
GBICs separately and you can change the type of Gigabit Ethernet interface supported by this line card
by simply changing its SFP GBIC module.
Table 1-19 lists the interface types supported by the Gigabit Ethernet line card.
For more information about the SFPs, see the following URL:
http://www.cisco.com/en/US/products/hw/modules/ps5000/tsd_products_support_series_home.html
Ta b l e 1-19 GBIC Port Cabling Specifications
SFP GBIC
Wavelength
(nm) Fiber Type
Core Size
(microns)
Modal
Bandwidth
(MHz*km) Cable Distance
1000Base-SX
SFP-GE-S
850 MMF 62.5
62.5
50.0
50.0
160
200
400
500
722 ft (220 m)
902 ft (275 m)
1640 ft (500 m)
1804 ft (550 m)
1000Base-LX/LH
SFP-GE-L
1300 MMF
1
SMF
1. Mode-conditioning patch cord is required. Using an ordinary patch cord with MMF, 1000Base-LX/LH SFPs, and a short link
distance (10s of meters) can cause transceiver saturation resulting in an elevated bit error rate (BER). In addition, when using
the LX/LH SFP with 62.5-micron diameter MMF, you must install a mode-conditioning patch cord between the SFP and the
MMF cable on both the transmit and receive ends of the link. The mode-conditioning patch cord is required for link distances
greater than 984 ft (300 m).
62.5
50.0
50.0
8 to 10
500
400
500
—
1804 ft (550 m)
1804 ft (550 m)
1804 ft (550 m)
32,808 ft (10 km)
1000Base-ZX
GLC-ZX-SM
1550 SMF 9, 10 — 43.4 to 62 miles
(70 to 100 km)
2
2. 1000Base-ZX SFP can reach up to 100 km by using dispersion-shifted SMF or low attenuation SMF; the distance depends
on fiber quality, number of splices, and connectors.
1000Base-T SFP NA NA NA NA 328 ft (100 m)