Features
Cable length	0.4 m
Connector 1	QSFP
Connector 2	QSFP
Connector 1 gender	Male
Connector 2 gender	Male
Product colour	Black
Data transfer rate	112 Gbit/s
Operational conditions
Operating temperature (T-T)	-20 - 80 °C
Packaging data
Package width	182 mm
Package depth	147 mm
Package height	53 mm
Package weight	169 g
Package type	Box
Weight & dimensions
Cable diameter	5 mm
Weight	74 g

The Lenovo 4X91U42988 is a fiber cable with a length of 0.4 m, specifically developed for use in high-performance networks and storage systems. It connects devices with QSFP connectors and serves as a direct connection cable for data transmission between two ThinkStation PGX systems or between a PGX system and a network switch. The cable is black and features two QSFP connectors at each end, designed as plugs. The construction is compact and designed for use in dense rack environments.

Applications

The cable is primarily intended for applications in high-performance computing and data centers. It enables the connection of ThinkStation PGX systems equipped with QSFP ports, supporting integration into networks requiring high bandwidth and low latency. Typical use cases include server and storage environments where a stable, fast connection between end devices is necessary.

Functions and Features in Detail

The cable supports a data transfer rate of 112 Gbit/s, making it suitable for applications with high bandwidth requirements. The connection is made via fiber optics, ensuring high signal integrity and minimal signal loss. The QSFP connectors are designed for use in hot-swap environments, meaning the cable can be installed or replaced without shutting down the systems. The black color ensures seamless integration into standard rack systems.

Technology Explained Simply

The fiber optics in the cable transmit data as light signals, enabling higher transmission rates and reduced interference compared to copper cables. The QSFP connectors (Quad Small Form-factor Pluggable) are standardized, compact connectors developed for use in high-speed networks. The term QSFP refers to an interface capable of integrating up to four optical or electrical channels. The cable has a diameter of 5 mm, allowing for flexible handling and space-saving within racks.

Compatibility and Accessories

The cable is specifically designed for connecting ThinkStation PGX systems equipped with QSFP ports. It can also be used to connect a PGX system to a network switch, provided the switch also supports QSFP connectors. Compatibility is limited to devices using the QSFP interface.

Installation and Mounting

Installation is performed by simply plugging the QSFP connectors into the corresponding ports on the devices. The connectors are designed as plugs and fit into the QSFP ports of ThinkStation PGX systems. The connection is hot-swappable, meaning the cable can be inserted or removed while the systems are operating, without risk of system crash or data loss. The cable length of 0.4 m is designed for short connections within a rack or between adjacent devices.

Operational Advantages

The cable provides reliable and fast data transmission at a rate of 112 Gbit/s. The use of fiber optics ensures high signal quality and minimizes interference. The hot-swap capability of the QSFP connectors allows for flexible and uninterrupted maintenance. The compact design and short length of 0.4 m ensure efficient space utilization in rack systems. The operating temperature range of -20 to 80 °C makes the cable suitable for a wide range of environments, including industrial or server-proximate applications.