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-T1000Base-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 1-19lists the interface types supported by the Gigabit Ethernet line card.
Table 1-19 | GBIC Port Cabling Specifications | | | |
| | | | | | |
| | | | | Modal | |
| | Wavelength | | Core Size | Bandwidth | |
SFP GBIC | | (nm) | Fiber Type | (microns) | (MHz*km) | Cable Distance |
| | | | | | |
1000Base-SX | | 850 | MMF | 62.5 | 160 | 722 ft (220 m) |
SFP-GE-S | | | | 62.5 | 200 | 902 ft (275 m) |
| | | | 50.0 | 400 | 1640 ft (500 m) |
| | | | 50.0 | 500 | 1804 ft (550 m) |
| | | | | |
1000Base-LX/LH | 1300 | MMF1 | 62.5 | 500 | 1804 ft (550 m) |
SFP-GE-L | | | | 50.0 | 400 | 1804 ft (550 m) |
| | | | 50.0 | 500 | 1804 ft (550 m) |
| | | SMF | 8 to 10 | — | 32,808 ft (10 km) |
| | | | | | |
1000Base-ZX | | 1550 | SMF | 9, 10 | — | 43.4 to 62 miles |
GLC-ZX-SM | | | | | | (70 to 100 km)2 |
1000Base-T SFP | NA | NA | NA | NA | 328 ft (100 m) |
| | | | | | |
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).
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.
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
| Cisco uBR10012 Universal Broadband Router Hardware Installation Guide |
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