Specifications

Cisco 7200 VXR Installation and Configuration Guide

OL-5013-08

Chapter 3 Installing a Cisco 7200 VXR Router

Connecting I/O Controller, NPE-G1, or NPE-G2 Cables

The mode-conditioning patch cord assembly is composed of duplex optical fibers, including a

single-mode-to-multimode offset launch fiber connected to the transmitter, and a second conventional

graded-index multimode optical fiber connected to the receiver. The use of a plug-to-plug patch cord

maximizes the power budget of multimode 1000BASELX and 1000BASELH links.

Note The mode-conditioning patch cord is required to comply with IEEE standards. The IEEE found that link

distances could not be met with certain types of fiber-optic cable cores. The solution is to launch light

from the laser at a precise offset from the center, which is accomplished by using the mode-conditioning

patch cord. At the output of the patch cord, the SFP-GE-L= is compliant with the IEEE 802.3z standard

for 1000BASELX.

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.

Gigabit Ethernet GBIC Connections

The Gigabit Interface Converter (GBIC) port is a 1000-Mbps optical interface in the form of an SC-type

duplex port that supports IEEE 802.3z interfaces compliant with the 1000BASEX standard. (See

Figure 3-18.)

Note The GBIC is a separately orderable part and does not ship installed in your I/O controller. You must

install the GBIC before you connect the cables to it.

Figure 3-18 shows the simplex and duplex SC-type connectors on your multimode or single-mode

fiber-optic cables. For simplex connectors, two cables are required, one cable for transmit (TX) and a

second cable for receive (RX). For duplex connectors, one cable that has both TX and RX connectors is

required. You can use either simplex or duplex connectors for the C7200-I/O-GE+E or the NPE-G1.

1 Gray color identifier 5 Single-mode bar

2 To Gigabit Ethernet interface 6 Offset

3 Blue color identifier 7 Beige color identifier

4 Multimode bar 8 To cable plant

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