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Cisco 7200 VXR Installation and Configuration Guide
OL-5013-09
Chapter 3 Installing a Cisco 7200 VXR Router
Connecting I/O Controller, NPE-G1, or NPE-G2 Cables
Table 3-2 provides cabling specifications for the SFP modules that you install in the Gigabit Ethernet
SFP ports.
The NPE-G2 supports single Ethernet interfaces based on SFP module technology. The following SFP
modules are supported by this line card:
• 100BASE-FX SFP—The SFP-GE-F=,100BASE-FX SFP module is a hot-swappable device that
plugs into a Gigabit Ethernet SFP port. It provides full-duplex 100-Mbps connectivity over
multimode fiber (MMF) infrastructures. The 100BASE-FX SFP operates on ordinary MMF optical
link spans of up to 2 kilometers (km) in length.
• 1000BASE-LX/LH SFP—The SFP-GE-L=, 1000BASE-LX/LH SFP module operates on ordinary
single-mode fiber-optic link spans of up to 10,000 meters in length.
• 1000BASE-SX SFP—The SFP-GE-S=, 1000BASE-SX SFP module operates on ordinary
multimode fiber-optic link spans of up to 550 meters in length.
• 1000BASE-ZX SFP—The SFP-GE-Z=, 1000BASE-ZX SFP module operates on ordinary single
mode fiber-optic link spans of up to 70 kilometers in length. Link spans of up to 100 km are possible
using premium single-mode fiber or dispersion-shifted single-mode fiber. The SFP module provides
an optical link budget of 23 dB—the precise link span length depends on multiple factors such as
fiber quality, number of splices, and connectors.
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
SFP-GE-Z= at each end of the link whenever the fiber-optic cable span is less than 25 km.
Note The required line card SFP module is shipped installed in the line card. Cisco sells individual SFP
modules separately and you can change the type of Gigabit Ethernet interface supported by this line card
by simply changing its SFP module.
Note Optical fiber cables are commercially available; they are not available from Cisco Systems.
Note We strongly recommend cleaning optical fiber connections before attaching cables to equipment. See the
“Fiber-Optic Cleaning Information” section on page 5-10 for information.
Ta b l e 3-1 SFP Module Specifications
Specification Description
Dimensions (H x W x D) Height: 0.33 in. (8.5 mm)
Width: 2.22 in. (56.5 mm)
Depth: 0.53 in. (13.4 mm)
Connectors Multimode fiber-optic: LC
Single-mode fiber-optic: LC
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