Ethernet is considered (for the most part) a non-deterministic networking scheme, using “best effort” and requiring handshakes and confirmation. While this makes it inherently reliable, it also makes Ethernet natively unsuitable for time-sensitive applications — such as voice/video over IP, Robotic (Motion) Control, Industrial Automation, etc. — that require real-time communication or time synchronization.

The Precision Time Protocol, as defined in the IEEE-1588 standard, provides a method to precisely synchronize compute devices over a Local Area Network (LAN) or Wide Area Network (WAN) using “clock synchronization.” However, if two clocks are set at the same rate, there is no guarantee that they will stay in synchronization. Therefore, the synchronization process must be continuous.

Clock synchronization on the LAN/WAN requires at least one Master and one Slave clock–multiple Slaves can synchronize to a single Master.  The Master clock provides synchronization messages that the Slaves use to correct their local clocks.  Precise timestamps are captured at the Master and Slave clocks.  These timestamps are then used to determine the network latency which is required to synchronize the Slave to the Master.  A sync message is transmitted typically every two seconds from the Master, and a delay request message from a Slave is transmitted less frequently, approximately one request per minute.

 

Ethernet Switches

Ethernet switches are categorized as either standard Ethernet switches or IEEE-1588 enabled Ethernet switches.

The IEEE 1588 protocol defines three kinds of clocks (or switches):
a. Ordinary:  A device with a single network connection, either the source of (Master) or destination for (Slave) a synchronization reference.
b. Boundary:  A device with multiple network connections that can accurately synchronize one network segment to another. A synchronization master is selected for each of the network segments in the system. The root timing reference is called the grandmaster.
c. Transparent:  A multi-port device that forwards precision time protocol messages, measuring the time taken for event messages to pass through the device, and accounts for this residence time by modifying the message, or by sending a separate follow-up message.

A standard Ethernet switch temporarily stores packets before sending them out.  The storing time of the packet is non-deterministic and network load-dependent, which results in packet delay variation.  The packet delay variation is the primary reason for poor time synchronization on the network, even when there are Master and Slave devices on the network that support hardware timestamping. An IEEE-1588 enabled Ethernet switch is either a transparent device or a boundary device that improves synchronization between the Master and Slaves, thus ensuring that the Master and Slaves are not impacted by packet delay variation.

As Techaya continues to enhance our products to support mobile military network requirements, we are adding support for IEEE 1588 to our products. One of our newest products, the MILTECH 9136 has both hardware and software support for enhanced 1588 v2 and SyncE features. The switch can support grand master, boundary, slave and transparent modes. The newer Enhanced versions of the MILTECH 904,918, 919, 908, 912, 914, 948, products all support peer-to-peer transparent clock, end-to-end transparent clock, and PTP over IPV4 via software features. Upgrades from Non-enhanced (Ex: 918-00X) versions to Enhanced (Ex: 918-10X) are available at no charge and are field-deployable.

 

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We’re headed to AUVSI’s XPONENTIAL next week with one of Techaya’s newest device the MILTECH303. The industry’s only rugged, MIL-STD, IP68 ultra-compact USB 3.1 USB hub. This cool little hub is designed not only to connect USB devices—handhelds, sensors, night vision goggles, keyboards— but also provide power management and charging of up to 5 devices at a time.

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Today, we announced the availability of the new Techaya MILTECH 9124 and MILTECH 9128 board-level, ultra-compact Ethernet switches. These conformally coated, Layer 2/Layer 3, 24- and 28-port 1 GbE and 10 GbE Ethernet switch/routers are designed specifically as embedded solutions for military, avionic and commercial communications platforms.

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Techaya just recently announced a major platform upgrade to their compact, ultra-compact and board level managed Ethernet switches. Through a major firmware upgrade, these managed Ethernet switches now have some key new features.

Why is this so important to existing and future customers of Techaya managed Ethernet switches? Well, this new platform upgrade (available free through a firmware update) adds Layer 3 static routing functionality to these compact, ultra-compact and board-level Layer 2 Ethernet switches. By adding static routing functionality, these switches can now perform IPv4 and IPv6 static routing between VLANs without having to add a router upstream. This reduces the amount of equipment, weight and cost on mobile military platforms.

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This week, Techaya, developer and manufacturer of military-grade, COTS and customized IP-based communication solutions, introduced its new MILTECH M64 military-grade, IP68-rated, miniature USB3 device. This new, novel USB solution from Techaya that takes rugged portability and security of your data to the next level.

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Power over Ethernet or PoE, allows a single cable to provide both data connection and electrical power to networked pieces of equipment such as sensors, IP video cameras and even wireless mesh nodes. PoE works across standard network cabling (i.e. CAT5) to supply power directly from the data ports to which networked devices are connected.

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As the leading provider of ultra-compact Ethernet switches, we are often specified in to environments that are often labeled as “sensor pods”. Since the term “sensor” seems so generic, I thought I’d do a little research on what some these sensor technologies are and what were some of their applications . As I was investigating their applications, I found that several of the military uses are quickly making it to commercial applications.

1) Hyperspacial Sensors. These sensors use reflections from hundreds of bands in the infrared range of the electromagnetic spectrum. We all understand that cameras and eyeballs use UV to identify targets by their shape or by contrasts of light and dark. Well, hyperspectral scanners use reflections of various IR wavelengths to determine the material that a target is made of. Every object has its own unique “fingerprint” and hyperspacial sensors collect the data and help match it up to those “fingerprints”. Today, military applications of hyperspacial sensors include detecting roadside bombs and fields of illegal drugs such poppies for opium.

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MILTECH 912 Rugged Military Ethernet Switch

Here at MilSource, we’re happy to announce that Techaya has expanded upon it MILTECH 908MP compact Ethernet switching platform.  The new MILTECH 912 is a managed Ethernet switch that offers the same advanced network features including VLANs, traffic prioritization (QoS) and bandwidth aggregation, but has expanded its port density to 12 triple-speed (10/100/1000 Mbps) Ethernet ports using 2 D-38999 connectors.

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Techaya’s complete line for military-grade Ethernet switches, routers and hubs are developed from the ground up to meet rigorous military standards for shock, vibration, temperature rating power requirements and other rigorous standards to ensure that a piece of equipment will hold up under the most toughest of mission, terrains and volatile situations. We often get questions as to what MIL-STD 1275 is when it comes to meeting power requirement.

MIL-STD-1275 covers the characteristics of 28-VDC (as opposed to 12 VDC) electrical systems in military vehicles and provides detailed requirements for military ground platform electrical systems, including electromagnetic compatibility (EMC), starting mode, normal operating mode, generator-only mode operation, and their associated spikes, surges and operating limits.

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The MILTECH 919 mounted on an Evaluation Board

Meet the industry’s smallest Gigabit Ethernet Switch for Embedded and Harsh Environments.

Aircraft designers have always had payload maximization as a top priority when designing new products. However, today these designers have been tasked with making vehicles smaller and lighter while still meeting the payload requirements of new, advanced aircraft, UAVs and even unmanned ground vehicles. Continuing on the promise to deliver the industry’s most innovative

MIL-SPEC Ethernet switches that pound the competition in SWAP-C, Techaya is introducing the MILTECH 919 board-level managed gigabit Ethernet switch. It radically lightens payload of weight-sensitive platforms such as SUAS, small UGVs and other aircraft.

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