Uni-directional, LC Connector, 1000Base-Tx, 1000Base-Rx,Server Adapter
  • lr-link(用来填充位置)
  • amazon
  • newegg
  • aliexpress
  • alibaba
  • Linkreal Co., Ltd.
  • Linkreal Co., Ltd.
  • Linkreal Co., Ltd.
  • Linkreal Co., Ltd.
  • Linkreal Co., Ltd.
  • Linkreal Co., Ltd.
BackHomeProductsCyber Security CardOne-Way NICs
  • One-Way LC Port Ethernet Network Adapter
  • One-Way LC Port Ethernet Network Adapter


PCIe x4 1G Fiber One-Way LC Port Server Adapter (Intel 82576)
Key Features


  • Overview
  • Specifications
  • Ordering
  • Driver
  • Relative Products

PCIe x4 1G Fiber Uni-directional Server Adapter (Transmitport) (Intel 82576 Based)

PCIe x4 1G Fiber Uni-directional Server Adapter (Receive port) (Intel 82576 Based)


LREC9701EF-TX/RX fiber network card is the second generation simplex communication gigabit fiber optic Ethernet Adapter, based on Intel 82576EB, researched and developed by Shenzhen Lianrui Electronics Co., LTD.

Transmit network card and receive network card compose the Ethernet Adapter, connecting by uni-directional LC fiber patch cord.

Using the latest optical fiber simplex communication technology, effectively guarantee the stability of data transmission, reduce the packet loss rate. Since the simplex communication characteristics of light, this Ethernet Adapter not only achieve physical separation between the internal computer network and the external network, but also ensure that the data between internal and external networks in real time, reliable, secure simplex communication. With third-party software, LREC9701EF-TX/RX server adapter can be widely used in public security, government systems, military and other security departments as well as used in other confidential computer network.


Designed for Multi-Core Processors
These Simplex communication adapters provide high-performing, Gigabit connectivity in a multi-core platform as well as in a virtualized environment. In a multi-core platform, the adapters support different technologies such as multiple queues, receive-side scaling, MSI-X, and Low Latency Interrupts, that help in accelerating the data across the platform, thereby improving application response times.

The I/O technologies on a multi-core platform make use of the multiple queues and multiple interrupt vectors available on the network controller. These queues and interrupt vectors help in load balancing the data and interrupts amongst themselves in order to lower the load on the processors and improve overall system performance. For example, depending upon the latency sensitivity of the data, the low level latency interrupts feature can bypass the time interval for specific TCP ports or for flagged packets to give certain types of data streams the least amount of latency to the application.


Optimized for Virtualization

The LREC9701EF-TX/RX simplex communication Server Adapter showcase the latest virtualization technology called Intel® Virtualization Technology for Connectivity (Intel VT for Connectivity). Intel VT for Connectivity is a suite of hardware assists that improve overall system performance by lowering the I/O overhead in a virtualized environment. This optimizes CPU usage, reduces system latency, and improves I/O through- put. Intel VT for Connectivity includes:

Virtual Machine Device Queues (VMDq)
Intel I/O Acceleration Technology


Virtual Machine Device queues (VMDq)

VMDq reduces I/O overhead created by the hypervisor in a virtualized server by performing data sorting and coalescing in the network silicon.2 VMDq technology makes use of multiple queues in the network controller. As data packets enter the network adapter, they are sorted, and packets traveling to the same destination (or virtual machine) get grouped together in a single queue. The packets are then sent to the hypervisor, which directs them to their respective virtual machines. Relieving the hypervisor of packet filtering and sorting improves overall CPU usage and throughput levels.

LR-LINK LREC9701EF-TX/RX PCIe Gigabit adapter provides improved performance with the next-generation VMDq technology, which includes features such as loop back functionality for inter-VM communication, priority-weighted bandwidth management, and doubling the number of data queues per port from four to eight. It now also supports multicast and broadcast data on a virtualized server..

Intel I/O Acceleration Technology

Intel I/O Acceleration Technology (Intel I/OAT) is a suite of features that improves data acceleration across the platform, from networking devices to the chipset and processors, which help to improve system performance and application response times. The different features include multiple queues and receive-side scaling, Direct Cache Access (DCA), MSI-X, Low-Latency Interrupts, Receive Side Scaling (RSS), and others. Using multiple queues and receive-side scaling, a DMA engine moves data using the chipset instead of the CPU. DCA enables the adapter to pre-fetch data from the memory cache, thereby avoiding cache misses and improving application response times. MSI-X helps in load-balancing I/O interrupts across multiple processor cores, and Low Latency Interrupts can provide certain data streams a non-modulated path directly to the application. RSS directs the interrupts to a specific processor core based on the application’s address.

End-to-end Wired Security
The LR-LINK LREC9701EF-TX/RX simplex communication Server Adapter is PCIe adapters to provide authentication and encryption for IPsec and LinkSec. LinkSec is already designed into the network adapter hardware. These adapters are future-proof and prepared to provide LinkSec functionality when the ecosystem supports this new technology.

IPsec provides data protection between the end-point devices of a network communication session. The IPsec offload feature is designed to offload authentication and encryption of some types of IPsec traffic and still delivers near line-rate throughput and reduced CPU utilization.

LinkSec is an IEEE industry-standard feature that provides data protection in the network. The IEEE 802.3ae and IEEE 802.3af protocols provide hop-to-hop data protection between two network devices in the transaction line between the host and destination. The two network devices must support the LinkSec technology. The network devices could be servers, switches, and routers.



Intel 82576 Gigabit Ethernet Controller


iSCSI remote boot support

Load balancing on multiple CPUs

Compatible with x4, x8, and x16 standard and low-profile PCI Express slots

Multi-port design

Support for most network operating systems (NOS)

Intel PROSet Utility for Windows Device Manager

Onboard uni-directional transmit optical module and uni-directional receive optical module, 1310nm wavelength

uni-directional LC Connector .


I/O Features for Multi-Core Processor Servers

Multiple queues & receive-side scaling

MSI-X support

Low Latency Interrupts

Header splits and replication in receive

Multiple queues: 8 queues per port

Tx/Rx IP, SCTP, TCP, and UDP checksum offloading (IPv4, IPv6) capabilities

Tx TCP segmentation offload (IPv4, IPv6)

Receive and Transmit Side Scaling for Windows  environment and Scalable I/O for Linux  environments (IPv4, IPv6, TCP/UDP)

IPsec Offload



Virtualization Features

Virtual Machine Device queues2 (VMDq)

Next-generation VMDq

IPv6 offloading

Advanced packet filtering

VLAN support with VLAN tag insertion, stripping and packet filtering for up to 4096 VLAN tags

PC-SIG SR-IOV Implementation (8 virtual functions per port)   


Manageability Features

On-board microcontroller

Advanced filtering capabilities

Preboot execution Environment (PXE) Support

Simple Network Management Protocol (SNMP) and Remote Network Monitoring (RMON) Statistic Counters

Wake-on-LAN support

iSCSI boot

Watchdog timer

IEEE 1588 precision time control protocol


Network Operating Systems (NOS) Software Support

Windows 2000

Windows XP

Windows Vista 32-bit (64-bit)

Windows 7 32-bit (64-bit)

Windows 8 32-bit (64-bit)

Windows Server 2003 32-bit (64-bit)

Windows Server 2008 32-bit (64-bit)

Windows Server 2008 R2 32-bit (64-bit)

Windows Server 2012 R2 32-bit (64-bit)

Novell Netware 5.x、6.x

Linux kernel version 2.6.30 or greater (x86_64) (w/ SR-IOV support)

FreeBSD 7.x OR laster


Novell ODI

OS 8 or laster

SCO Open Server

UnixWare / OpenUnix 8

Sun Solaris x86

OS Independent

VMware ESX

Ordering Information:





PCIe x4 1G Fiber Uni-directional Server Adapter(Transmit port)  

with the RX matching use,1310nm,20km


PCIe x4 1G Fiber Uni-directional Server Adapter (Receive port)  

with the TX matching use, 1310nm,20km

PS: The above detailsareonlyfor reference,if there is any change,no inform will have.