Cisco Cisco DWDM Transceiver Modules Bulletins
© 2011 Cisco and/or its affiliates. All rights reserved. This document is Cisco Public Information.
Page 2 of 4
Table 2 describes the MCP cables offered by Cisco. Note there are mainly two types of MCP respectively for
applications over 62.5-micron MMF and 50-micron MMF.
Table 2.
Mode Conditioning Patch Cables
Product Number
Product Description
CAB-GELX-625=
IEEE 802.3z-compliant optical fiber assembly consisting of a single-mode fiber permanently coupled off-center to a
62.5-micron multimode optical fiber with duplex SC connectors at both ends. The patch cord is 3 meters (9.84 feet) in
length.
62.5-micron multimode optical fiber with duplex SC connectors at both ends. The patch cord is 3 meters (9.84 feet) in
length.
CAB-MCP50-SC=
IEEE 802.3z-compliant optical fiber assembly consisting of a single-mode fiber permanently coupled off-center to a
50-micron multimode optical fiber with duplex SC connectors at both ends. The patch cord is 1 meter (3.28 feet) in
length.
50-micron multimode optical fiber with duplex SC connectors at both ends. The patch cord is 1 meter (3.28 feet) in
length.
CAB-MCP-LC=
IEEE 802.3z-compliant optical fiber assembly consisting of a single-mode fiber permanently coupled off-center to a
62.5-micron multimode optical fiber with duplex SC connectors at one end and duplex LC connectors at the other
end. The patch cord is 1 meter (3.28 feet) in length.
62.5-micron multimode optical fiber with duplex SC connectors at one end and duplex LC connectors at the other
end. The patch cord is 1 meter (3.28 feet) in length.
Figure 1 shows an MCP and how it is typically connected to a transceiver module. When required, it is inserted
between a transceiver module and the MMF cable plant.
Figure 1. Mode Conditioning Patch Cable Installation
Types of Multimode Fiber
Table 3 provides a brief overview and naming conventions of various MMF types deployed in the field.
For additional information about optical fibers, refer to
http://www.cisco.com/en/US/prod/collateral/modules/ps5455/white_paper_c11-463661.html
.
Table 3.
Types of MMF
Naming Convention
Core Size in Microns
Modal Bandwidth at 850 nm (MHz*km)
OFL Modal Bandwidth at 1310 nm
(MHz*km)
(MHz*km)
FDDI-grade
62.5
160
500
OM1
62.5
200
500
OM2
50
500
500
OM3
50
1500
500
Requirements for Gigabit Ethernet Transmissions
The requirement for MCP is specified only for 1000BASE-LX/LH transceivers transmitting in the 1300-nm window
and in applications over MMF. MCP should never be used in 1000BASE-SX links in the 850-nm window.
MCP is required for 1000BASE-LX/LH applications over FDDI-grade, OM1, and OM2 fiber types. MCP should
never be used for applications over OM3, also known as “laser-optimized fiber.”