Model 922-MES

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The Model 922-MES is an advanced SIIS level 3 managed switch supporting next generation redundancy, timing protocols and Quality of Service (QoS). Using a flexible modern hardware architecture allows the model 922-MES to support current and new protocols in software as they become adopted. This allows for a long product life, without the need to re-qualify hardware to support new features.

A unique advantage of the model 922-MES flexible hardware architecture is the secure user application space. The microcontroller on the model 922-MES has a secure application space allowing a user to install custom software, differentiating their product from others. The secure user application space does not interfere with the core functionality, nor does it invalidate the qualification.

Advanced diagnostics can be used to monitor and report the health of the system. The diagnostics are available via Modbus TCP, and other protocols over any of the Ethernet ports, and provide a unified interface for all 922 products. The model 922-MES also provides a black box by storing life data on-board. The black box is accessible over any of the Ethernet ports. The diagnostics capabilities of the model 922-MES can be used to trend and monitor the life of the product providing enhanced visibility into system performance.

Optical communication performance can be extended by using Focal’s subsea qualified fiber-optic SFP modules. Options are available supporting tiebacks or step outs of up to 200 km.


  • 10-port SIIS level 3, layer 2 switchQualified per ISO 13628-6 / API 17F
  • MTBF > 200,000 hours at +40 C
  • Redundancy protocols: RSTP, MRP, HSR, PRP
  • Precision timing per IEE-1588v2 PTP
  • Secure user application space
  • Advanced diagnostics and configuration using Modbus TCP
  • DHCP-configured IP address with static IP backup
  • 3U Eurocard form-factor with options for front panel or heat sink
  • Failsafe remote firmware update


  • Proven SIIS level 3 solution for subsea communications
  • Reduces cost by using standard configurations
  • Supports copper or fiber-optic connections with qualified SFP modules
  • Flexible architecture allowing feature upgrades as new protocols are adopted
  • Simplifies integration with unified software interface

Typical Applications

  • Subsea communications
  • Long distance step out or tie back
  • Subsea Electronics Modules (SEM) and other subsea distribution nodes



 Model 922-MES Specifications
Ethernet Ports (SIIS Level 3)

No. Ports

10 (8 X Copper, 2X Optical)
Copper 2 X SIIS Level 3 10/100/1000 Base -T Copper Ethernet Ports
Optical 2 X SIIS level 3, 100 Base –FX /1000 Base-X Optical Ethernet Ports
Parameters Onboard Temperature, Humidity, Voltage, Current Draw, TX/RX Optical Power, On Time, Off Events, Cable Diagnostics (Copper Ethernet ports), Ethernet Link Speed, Link Status, Duplex Mode. Per Port MIB Counters, Network Configuration Serial Number, FW revision
Management Modbus TCP, Telnet, Web interface (HTTP), DHCP
Configuration Modbus TCP, Telnet, user configuration management with failsafe backup
MAC Address Factory assigned unique MAC Addresses
Redundancy 802.1d RSTP, MRP, HSR, PRP
Traffic Shaping 802.1p QoS, 802.1q VLAN, aging (user configurable)
Time Sync IEEE 1588v2 PTP One Step end to end Transparent Clock
In-Field Firmware Update In-field re-programmable over any Ethernet port including remotely from topside. Card supports dual memory space for fail-safe revert to factory program code
LED Diagnostics On-board diagnostic LEDs (for factory testing only)
Front Panel (Optical) 2 x Dual LC or 2 x single LC (Bidi)
Backplane (Copper) 1 x DIN 41612
Consumption SIIS-Medium, 10 W typical (12 W max.)
Voltage +20 to +28 VDC, regulated
Current 0.4A (0.5 A max.)
Protection ESD, EMI, over-voltage, reverse voltage, overcurrent (no fuses)
Dimensions 3U Eurocard, 160 mm x 100 mm x 4 HP
Mounting Eurocard 3U rack or 4 x M3 hardware
Options Front panel
Life Cycle
Design Life > 20 years @ +40°C
> 200,000 hrs @ +40°C
Factory Acceptance Test (FAT) at min. and max. temperature
Options Environmental Stress Screening, thermal or vibration
Temperature -20°C to +70°C (operation)
-40°C to +85°C (storage)
Humidity 5% to 85% RH, non-condensing
Vibration 5 g, per ISO13628-6 / API 17F
Shock 30 g, per ISO 13628-6/ API 17F
Qualification ISO 13628-6 Q1/ API 17F
Options 8000 PSI rated
Qualification Testing Q1 Testing for Shock/Vibration/Temperature, Ref. API 17F, -20 to +70°C
Factory Acceptance Testing (FAT) Per API17F
Environmental Stress Screening (ESS) Option Temperature and vibration per API 17F,
with -20 to +70°C

*Some multimode channels on the 401-C and 402-C versions may have up to 8 dB loss. Contact factory for details


Technical Support

Telephone: +1-902-468-2263