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Cisco CRS-1 Carrier Routing System SIP and SPA Hardware Installation Guide
OL-17439-01
Chapter 3 Overview: Cisco CRS-1 Shared Port Adapters
1-Port 10-Gigabit Ethernet SPA Overview
•
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 Module Cabling and Connection Equipment
Table 3-26
provides cabling specifications for the SFP modules that can be installed on the 10-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).
Note
The 1000BASE-ZX SFP modules provide an optical power budget of 21.5 dB. You should measure your
cable plant with an optical loss test set to verify that the optical loss of the cable plant (including
connectors and splices) is less than or equal to 21.5 dB. The optical loss measurement must be performed
with a 1550-nm light source.
1-Port 10-Gigabit Ethernet SPA Overview
The following sections describe the 1-Port 10-Gigabit Ethernet SPA:
•
1-Port 10-Gigabit Ethernet SPA LEDs, page 3-40
•
1-Port 10-Gigabit Ethernet SPA XFP Optical Transceiver Modules, Connectors, and Cables,
page 3-40
Table 3-26
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
SMF
9/10
—
6.2 miles (10 km)
SFP-GE-Z
1550
SMF
9/10
—
49.7 miles
(80 km)
SMF
2
2.
Dispersion-shifted single-mode fiber-optic cable.
8
—
62.1 miles
(100 km)
