Cisco 7600 Series, Руководство по установке оборудования

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Cisco 7600 Series Router SIP, SSC, and SPA Hardware Installation Guide
OL-5052-08
Chapter 3 Overview: Cisco 7600 Series Router Shared Port Adapters
2-Port Gigabit Ethernet SPA Overview
When shorter lengths of single-mode fiber are used, it may be necessary to insert an in-line optical
attenuator in the link to avoid overloading the receiver.
•
Insert a 10-dB in-line 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 in-line 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 SFP-GE-T (1000BASET copper SFP module) provides full-duplex Gigabit Ethernet connectivity to
high-end workstations and between wiring closets over an existing copper network infrastructure. The
SFP-GE-T maximum cabling distance is 328 feet (100 m).
Note
Only full-duplex mode is supported. Because autonegotiation of full-duplex is not supported, you must
manually configure the remote port for full-duplex.
SFP Module Cabling and Connection Equipment
Table 3-29 provides cabling specifications for the SFP modules that can be installed on the 2-Port
Gigabit Ethernet SPA. 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 3-29 SFP Module Port Cabling Specifications
SFP Modules
Wavelength
(nm)
Fiber Type
Core Size
(micron)
Modal
Bandwidth
(MHz/km)
Maximum
Cable Distance
SFP-GE-S 850 MMF
1
1. Multimode fiber (MMF) only.
62.5 160 722 ft (220 m)
62.5 200 984 ft (300 m)
50.0 400 1640 ft (500 m)
50.0 500 1804 ft (550 m)
SFP-GE-L 1300 MMF
2
and
SMF
62.5 500 1804 ft (550 m)
50.0 400 1804 ft (550 m)
50.0 500 1804 ft (550 m)
9/10 — 6.2 miles (10 km)
SFP-GE-Z 1550 SMF 9/10 — 49.7 miles
(80 km)
SMF
3
8 — 62.1 miles
(100 km)
SFP-GE-T N/A Copper N/A N/A 328 ft. (100 m)