Model 907-GEM Multiplexer

GIGABIT ETHERNET (GBE) MULTIPLEXER

The 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, CAN Bus and various analog and digital sonars. Given the growing adoption of real-time Ethernet for critical control systems 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 of 20-30 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 accessible via the diagnostics card (907-DIAG-E) and graphical user interface (GUI) software.

Contact Our Experts

Jump To:

Overview

Specifications

Resources

Features

Four independent (switchless) and low latency 10/100/1000 Mbps Ethernet links
Compatible with non-standard Ethernet frames, e.g. multi-beam sonars, and jumbo frames
Interchangeable SFP optical transceiver
Rugged design for harsh environments, including pressure tolerant version
Compatible with 907-DIAG-E diagnostic card and Graphical User Interface (GUI) software
Supports up to six 907 expansion cards

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

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
Integrated solutions with Focal’s Fiber Optic Rotary Joints (FORJs)
for Gigabit data transmission through rotating interfaces

Specifications

Model 907-GEM Specifications
No. Copper Ports	4 (non-switched, independent)
Data Rates	10/100/1000 Base-T(X)
Total Throughput	500 - 2500 Mbps, via switch setting (0.01% used for embedded diagnostics)
Latency	< 15 μs (1000 M) < 150 μs (100 M) Less than 2 frame times Does not include fiber delay
Optical Fiber	1 or 2 singlemode (9/125 um)
Baud Rate	625 - 3125 Mbaud
Format	AME-EP (Moog proprietary)
Wavelengths	1310/1550 nm standard (CWDM optional, 1471 - 1611 nm)
Flux Budget	> 20 dB (24 dB typical)
Power Voltage	+5 VDC +/-10%, regulated
Power Current Draw	1.5 A typical (2 A max.)
Power Used	7.5 W typical (10 W max.)
Voltage Protection	Overvoltage, reverse polarity, 3 A time-delay fuse
LEDs	Power (electrical), Optical Link, Optical Fault, PHY Rx/Tx Activity, Port Rate, Port Error
Ethernet to PC	Diagnostic from remote and console through 907-DIAG-E at console
Dimensions	PC/104 (form-factor only)
Weight	125 g (0.27 lb), including SFP
Optical Connectors	Dual LC (SFP)
Data (Ethernet)	4 x RJ-45
Power	2-pin Molex, 0.156 inch pin spacing
Stacking	PC/104 (for stacking 907 cards only)
Temperature	-10°C to +60°C (operational) -40°C to +85°C (storage)
Humidity	85% RH, non-condensing
Vibration	5 g, 25-1000 Hz, 3 axes
Shock	30 g, 11 ms half-sine, 3 axes