## OSA-Express5S Gigabit Ethernet LX (FC 0413) 

The OSA-Express5S GbE LX feature includes one PCIe adapter and two ports. The two ports share a channel path identifier (CHPID type OSD exclusively). The ports support attachment to a 1 Gbps Ethernet LAN. Each port can be defined as a spanned channel and shared among LPARs and across logical channel subsystems. 

The OSA-Express5S GbE LX feature supports the use of an LC Duplex connector. Ensure that the attaching or downstream device has an LX transceiver. The sending and receiving transceivers must be the same (LX-to-LX). 

A 9 µmsingle-mode fiber optic cable that ends with an LC Duplex connector is required for connecting each port on this feature to the selected device. If multimode fiber optic cables are being reused, a pair of Mode Conditioning Patch cables is required, with one cable for each end of the link. 

For more information about supported distances, see Table 4-8 on page 189. 

## OSA-Express5S Gigabit Ethernet SX (FC 0414) 

The OSA-Express5S GbE SX feature includes one PCIe adapter and two ports. The two ports share a channel path identifier (CHPID type OSD exclusively). The ports support attachment to a 1 Gbps Ethernet LAN. Each port can be defined as a spanned channel and can be shared among LPARs and across logical channel subsystems. 

The OSA-Express5S GbE SX feature supports the use of an LC Duplex connector. Ensure that the attaching or downstream device has an SX transceiver. The sending and receiving transceivers must be the same (SX-to-SX). 

A multi-mode fiber optic cable that ends with an LC Duplex connector is required for connecting each port on this feature to the selected device. 

For more information about supported distances, see Table 4-8 on page 189. 

## OSA-Express5S 1000BASE-T Ethernet feature 

This feature (FC 0417) occupies one slot in the PCIe I/O drawer. It has two ports that connect to a 1000 Mbps (1 Gbps) or 100 Mbps Ethernet LAN. Each port has an SFP with an RJ-45 receptacle for cabling to an Ethernet switch. The RJ-45 receptacle is required to be attached by using an EIA/TIA Category 5 or Category 6 UTP cable with a maximum length of 100 meters (328 feet). The SFP allows a concurrent repair or replace action. 

The OSA-Express5S 1000BASE-T Ethernet feature supports auto-negotiation when attached to an Ethernet router or switch. If you allow the LAN speed and duplex mode to default to auto-negotiation, the OSA-Express port and the attached router or switch auto-negotiate the LAN speed and duplex mode settings between them. They then connect at the highest common performance speed and duplex mode of interoperation. If the attached Ethernet router or switch does not support auto-negotiation, the OSA-Express port examines the signal that it is receiving and connects at the speed and duplex mode of the device at the other end of the cable. 

The OSA-Express5S 1000BASE-T Ethernet feature can be configured as CHPID type OSC, OSD, or OSE. Non-QDIO operation mode requires CHPID type OSE. 

