3G/HD/SD-SDI RS422 Audio Ethernet Tally Intercom & Return Video over Fiber Multiplexer

Fiber Optical Converter Overview

The LNK-MSDI Series represents a comprehensive fiber optic multiplexing solution engineered for professional broadcast and live production environments. This advanced system integrates multiple critical broadcast signals into a single fiber optic link, supporting simultaneous transmission of 3G/HD/SD-SDI video (compliant with SMPTE 424M, 292, and 259 standards), RS422 camera control, bidirectional audio, 10/100 Base-T Ethernet, tally signaling, intercom communication, and return video feeds.

Our innovative multiplexing technology enables complete broadcast system connectivity through both single-mode and multimode fiber infrastructure. The system efficiently transports primary 3G/HD-SDI signals from camera heads to base station equipment while simultaneously providing comprehensive return path functionality including genlock synchronization, production intercom, tally indicators, and Ethernet data connectivity.

Specifically designed for multi-camera production setups, this solution consolidates all essential broadcast signals onto either tactical fiber cables or standard SMPTE hybrid fiber assemblies. This integrated approach ensures reliable, interference-free connectivity while significantly reducing cable complexity and deployment costs in both studio installations and remote broadcasting scenarios.

The robust architecture guarantees seamless operation in demanding production environments, providing broadcasters with a complete signal management solution that maintains signal integrity across extended distances. Ideal for outside broadcast vehicles, sports venues, and television studios, this multiplexer establishes new standards for reliability and efficiency in modern broadcast infrastructure, supporting the most demanding live production requirements with exceptional performance stability.

Features

• Comprehensive Signal Compatibility

  • Supports full SMPTE standard data rates from 270Mbit/s to 3Gbit/s, including 3G-SDI (424M), HD-SDI (292M), and SD-SDI (259M) formats with complete DVB-ASI compatibility

• Robust Signal Processing

  • Features advanced pathological pattern handling and automatic reclocking technology that maintains signal integrity across all supported data rates

• Integrated Broadcast System

  • Provides comprehensive remote production capabilities including tally light signaling, intercom communication, and return video transmission for complete camera-back system integration

• Extended Connectivity Options

  • Supports multiple serial data protocols including RS-232, RS-422, and RS-485 for flexible camera control system integration alongside 10/100 Ethernet data channels

• Flexible Fiber Deployment

  • Enables long-distance transmission with 10+ km reach on single-mode fiber or 300m on multi-mode fiber, adaptable to various broadcast infrastructure requirements

• Industrial-Grade Reliability

  • Designed for extended operating temperature range from -10℃ to 75℃, featuring terminal block power input and hot-swappable design for continuous broadcast operation

• Automatic Signal Optimization

  • Incorporates intelligent cable equalization that automatically compensates for signal degradation, ensuring broadcast-quality transmission without manual adjustment

• Seamless Camera Integration

  • Maintains direct compatibility with major broadcast camera systems, supporting simultaneous video transmission and camera control through unified fiber optic link

Application Scenarios

• Outside Broadcast Productions
  Enables multi-camera remote production for mobile broadcasting vehicles, supporting camera-back systems with integrated tally signaling, intercom communication, and return video feeds over single-fiber infrastructure.

• Live Event Broadcasting
  Facilitates large-scale event coverage in sports venues and concert facilities, transmitting multiple 3G-SDI camera feeds with simultaneous RS422 pan-tilt-zoom control, program return, and production intercom channels.

• Studio Production Systems
  Provides complete signal integration for television studio complexes, distributing camera control data, tally indicators, audio intercom, and Ethernet connectivity alongside primary SDI feeds to production control rooms.

• Remote Production Networks
  Supports distributed production workflows by extending camera signals from remote locations to centralized production centers with full genlock synchronization and real-time communication capabilities.

• Broadcast Facility Infrastructure
  Establishes inter-building signal links between production studios and transmission facilities, carrying composite broadcast signals including SDI video, Ethernet data, and control protocols over single-mode fiber.

• Electronic News Gathering
  Enables rapid deployment systems for field news production, providing integrated signal transmission for 3G-SDI cameras, communications, and control data through tactical fiber cables.

Technical indexes

Customizing Information

Application Display Diagram

Established in 2001 & headquartered in Shenzhen, E-link China Technology Co., Ltd. (E-link) is a leading manufacturer of fiber optic communication and video transmission products in China.

Our main products include:

• Fiber Media Converters
• Industrial Ethernet PoE switchs
•  PoE Injectors & Splitters
• PoE Extenders
• Serial Fiber Converters
• SFP Transceivers
• HDMI Fiber Converters
• DVI Fiber Converters
• HD/3G/6G/12G Fiber Extenders
• CCTV Fiber Optic Converters
• HDMI/ DVI/ VGA/ SDI Ethernet Extenders

With rich experience in providing high quality products in the
telecom and CCTV business, E-link has a large manufacturing factory
in Shenzhen, able to provide cost-effective solutions 

to serve our customers successfully.



   



   

                                                                   
                                                                  
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Since the launch of our products in domestic and international
markets, we have won a good reputation for our high-quality
products and sincere services. Our products are widely applied to

• System of Telecom
• Public Security
• Bank
• Smart City
• Public transportation
• New Energy Developing
• CCTV Monitoring Transmission

We also provide ODM & OEM services and we have cooperated with some famous companies all
over the world. Our own brand "E-link" is also well known in many countries and have distributors there.





   





















































                                                                   
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E-Link quality:

• ISO9001 Quality System
• CE, RoHS, FCC certified 
• 48 hours of weathering test before delivery
• Conduct full-spectrum environmental and electrical testing on all product designs

   





Our knowledgeable sales, technical support and engineering
personnel are dedicated to understanding your needs and designing
products and solutions to meet your needs. We would be happy to
provide you with the best price, quality products and fast
delivery.