Cisco ASR1006 Hardware Installation Guide - Page 70

10-Port Gigabit Ethernet SPA Overview Chapter 3 Overview: Cisco ASR 1000 Series Aggregation Services Routers SPAs The 1000BASE-ZX module must be coupled to single-mode fiber-optic cable, which is the type of cable typically used in long-haul telecommunications applications. The 1000BASE-ZX module does not operate correctly when coupled to multimode fiber, and it is not intended to be used in environments in which multimode fiber is frequently used (for example, building backbones or horizontal cabling). The 1000BASE-ZX module is intended to be used as a Physical Medium Dependent (PMD) component for Gigabit Ethernet interfaces found on various switch and router products. It operates at a signaling rate of 1250 Mbaud, transmitting and receiving 8B/10B encoded data. When shorter lengths of single-mode fiber are used, it may be necessary to insert an inline optical attenuator in the link to avoid overloading the receiver. Use the following guidelines: • Insert a 10-dB inline optical attenuator between the fiber-optic cable plant and the receiving port on the 1000BASE-ZX module at each end of the link whenever the fiber-optic cable span is less than 15.5 miles (25 km). • Insert a 5-dB inline optical attenuator between the fiber-optic cable plant and the receiving port on the 1000BASE-ZX module at each end of the link whenever the fiber-optic cable span is equal to or greater than 15.5 miles (25 km) but less than 31 miles (50 km). SFP-GE-T Modules The 1000BASE-T SFP module (SFP-GE-T) is compliant with IEEE 802.3:2000 and plugs into a standard Gigabit Ethernet SFP module port. It operates on standard Category 5 wiring and has an RJ-45 connector. The SFP-GE-T maximum cabling distance is 328 feet (100 m). The SFP-GE-T is hot-swappable. Autonegotiation is not supported. The SFP-GE-T module supports 10/100/1000 speeds, which must be explicitly configured using the speed command. Only full-duplex mode is supported, which must be configured using the duplex full command. SFP Module Cabling and Connection Equipment Table 3-17 provides cabling specifications for the SFP modules that can be installed on the Gigabit Ethernet SPAs. Note that all SFP ports have LC-type connectors. The minimum cable distance for the SFP-GE-S is 6.5 feet (2 m), and the minimum link distance for the SFP-GE-Z is 6.2 miles (10 km) with an 8-dB attenuator installed at each end of the link. Without attenuators, the minimum link distance for the SFP-GE-Z is 24.9 miles (40 km). Table 3-17 SFP Module Port Cabling Specifications SFP Modules SFP-GE-S SFP-GE-L Wavelength (nm) 850 1300 Fiber Type MMF1 MMF2 and SMF Core Size (micron) 62.5 62.5 50.0 50.0 62.5 50.0 50.0 9/10 Modal Bandwidth (MHz/km) 160 200 400 500 500 400 500 - Maximum Cable Distance 722 ft (220 m) 984 ft (300 m) 1640 ft (500 m) 1804 ft (550 m) 1804 ft (550 m) 1804 ft (550 m) 1804 ft (550 m) 6.2 miles (10 km) 3-28 Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Hardware Installation Guide OL-14126-12