Focal Multiplexer Product Line

907-GEM Multiplexer

Gigabit Ethernet (GbE) Multiplexer 907-GEM Gigabit Ethernet (GbE) Multiplexer

The Model 907-GEM is an expandable Gigabit Ethernet (GbE) multiplexer that enables modular fiber optic telemetry solutions, particularly for Ethernet intensive applications. As a motherboard, the 907-GEM provides four completely independent and “switchless” 10/100/1000 Mbps Ethernet links and can be stacked with standard 907 expansion cards to add other signal types, such as serial channels (RS-232/485/422), hydrophones, responder triggers, CANBus and various analog and digital sonars. Given the growing adoption of real-time Ethernet for critical control systems (e.g. EtherCAT) and digital video (e.g. GigE Vision), the low latency 907-GEM is an exceptional core solution for current and future applications.

As a standalone card, 907-GEM replaces four separate Ethernet media converters with a single board and a single fiber link. This significantly reduces size and cost compared to standard media converter solutions, which typically require 2-4 stacked cards plus four transceivers, eight fibers and an optical coupler for the same Ethernet capability.

A wide range of optical options are available for the 907-GEM, including CWDM wavelengths for optical multiplexing with other media converters and multiplexers. Optical power budgets are typically 20-26 dB over 10 km of singlemode fiber, and multimode links of up to 2 km are also supported. In addition to on-board LEDs, the 907-GEM includes integrated diagnostics when used with the standard diagnostics card (907-DIAG-E) and graphical user interface (GUI) software.

Features

  • Four independent (switchless) 10/100/1000 Mbps Ethernet links
  • Single, interchangeable SFP optical transceiver (up to 2.5 Gbps data
  • Rugged design for harsh environments, including pressure tolerant version
  • Remote diagnostics available at console via Ethernet on 907-DIAG-E
  • Support for up to six Model 907 expansion cards (up to 48 serial channels)

Benefits

  • Reduces cost and size for systems with multiple Ethernet media converters
  • Provides low latency for real-time systems
  • Simplifies troubleshooting with advanced diagnostics
  • Enables expandable and reconfigurable multiplexer solutions
  • Replaces many fiber links and transceivers with a single fiber link
  • Supports a wide range of optical options, including CWDM wavelengths and multimode configurations

907-GEM Specifications

  • No. Copper Ports

    4 (non-switched, independent)

  • Data Rates

    10/100/1000 Mbps

  • Data Formats

    10/100/1000 BaseT

  • Optical Fiber

    1 or 2 singlemode (9/125 um)

  • Optical Baud Rate

    625 - 3125 Mbaud

  • Wavelengths

    1310/1550 nm standard (CWDM)

  • Flux Budget

    20 dB min. standard (others available)

  • Power Supply

    +5 VDC +/-10%, regulated input required

  • Current Draw

    1.5 A typical (2 A max.), all ports active

  • Power Used

    7.5 W typical (10 W max.), all ports active

  • Dimensions

    PC/104 (form factor only)

  • Weight

    125 g (0.27 lb), including SFP

  • Optical Connectors

    Dual LC (SFP)

  • Temperature

    -10 to +60 °C (ambient, operational)
    -40 to +85 °C (ambient, storage)

  • Vibration

    +/- 2 mm (5-25 Hz), 5 g (25-1000 Hz)

  • Shock

    30 g, 11 ms half-sine, six directions

  • Humidity

    85% RH, non-condensing

Typical Applications

  • Remotely Operated Vehicles (ROV) and Tether Management Systems
  • Ethernet Based Video Systems
  • Advanced Sonar Systems
  • Tactical Networks and Defense Systems
  • Industrial Process Control

907-GEM Multiplexer Technical Data Sheet

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