Name: J4858C-C HP X121 1.25Gb/s 1000Base-SX 850nm 550m SFP Transceiver
Brand: HP
SKU: J4858C-C
Price: 1.00 USD
Availability: InStock
Rating: 4.8 (130 reviews)

Product Overview
The HP X121 1.25Gb/s 1000Base-SX SFP Transceiver (J4858C-C) provides an optical interface for Gigabit Ethernet over multimode fiber. It supports data transmission at 1.25 Gb/s with an 850nm wavelength and allows link distances up to 550 meters. The module's compact SFP design enables easy integration into compatible HP switches and routers.

General Information
Brand	HP

Technical Information
Form Factor	SFP
Media	MMF
Type	VCSEL
Protocols	1000Base-SX,Gigabit Ethernet
Connector	LC Duplex

Physical Characteristics
Weight	3.00
Condition	Refurbished

Product Description
The HP X121 SFP Transceiver (model J4858C-C) is designed to facilitate Gigabit Ethernet connections over multimode fiber optic cabling. It is commonly used in network switches and routers that support 1000Base-SX standards, enabling data transfer at 1.25 Gb/s. This transceiver module utilizes an 850nm wavelength laser and supports transmission distances up to 550 meters, making it suitable for short to medium reach fiber optic links within enterprise networks. Its SFP form factor allows for easy installation and hot-swapping in compatible network devices. Key Features Data rate: 1.25 Gb/s compliant with 1000Base-SX Ethernet standard Multimode fiber support using 850nm wavelength Reach up to 550 meters over OM2 or better fiber Small Form-factor Pluggable (SFP) hot-pluggable design Compatible with HP networking equipment supporting SFP modules This transceiver module is an integral component in establishing reliable fiber optic links for Gigabit Ethernet networks. It enables network administrators to extend connections between devices while maintaining standard compliance and interoperability within HP network infrastructures.

Use Cases
This transceiver is typically deployed in enterprise networking environments requiring fiber optic Gigabit Ethernet connectivity. It is suited for data center, campus, or branch office networks where multimode fiber cabling is used for inter-switch links or server connections. How It's Used: Connecting HP switches in data centers using 1000Base-SX fiber links Establishing Gigabit Ethernet uplinks within campus network infrastructures Replacing or upgrading existing SFP modules in HP networking equipment Extending network segments over multimode fiber up to 550 meters Supporting fiber optic connections for server or storage area networks Overall, this module serves as a critical interface to support optical Gigabit Ethernet communication in HP network environments, enabling reliable and standardized fiber connections for various network segments.

FAQ's
What fiber type does the J4858C-C support? The J4858C-C supports multimode fiber, designed for use with 1000Base-SX networks operating at an 850nm wavelength. What is the maximum transmission distance for this transceiver? This HP SFP module supports a maximum distance of up to 550 meters over suitable multimode fiber such as OM2 or better. Can this transceiver be hot-swapped? Yes, the J4858C-C uses a Small Form-factor Pluggable (SFP) design that allows for hot-swapping in compatible network devices. Is the J4858C-C compatible with non-HP switches? Compatibility is generally intended for HP equipment supporting SFP modules; compatibility with other brands cannot be confirmed without specific testing. What data rate does the HP X121 transceiver support? The transceiver operates at 1.25 Gb/s, compliant with the 1000Base-SX Ethernet standard. What wavelength does this transceiver use? The module transmits at an 850nm wavelength, which is standard for 1000Base-SX multimode fiber applications.

J4858C-C HP X121 1.25Gb/s 1000Base-SX 850nm 550m SFP Transceiver

Product Overview

General Information

Technical Information

Physical Characteristics

Product Description

Use Cases

FAQ's