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No 25/2025 (June 23, 2025)
Holiday break. The next issue of the Weekly Review will be published on September 1st 2025.
Technological breakthrough in China - Hyperloop getting closer to commercial realisation.
A breakthrough has been made in China in the development of Hyperloop vacuum transport technology, which could revolutionise the way we travel medium and long distances. After years of testing and technical limitations, engineers from the Middle Kingdom have reported a successful solution to one of the technology's most serious problems: excessive vibrations and turbulence inside the vacuum tunnels, which have so far prevented comfortable and safe travel at very high speeds.Hyperloop systems, in theory capable of travelling at speeds in excess of 1,000 km/h, rely on capsules moving in a near-total vacuum, floating magnetically above the track. So far, however, tests in depressurised tunnels have revealed serious vibration problems. At speeds of up to 400 km/h, passengers felt very strong, unpleasant vibrations that effectively ruled out regular use of the system.
However, Chinese researchers have developed a new type of hybrid suspension, aided by artificial intelligence systems that analyse real-time data from the track and actively neutralise shocks. As a result, the intensity of vibrations has been reduced by up to half, a key step towards a fully functional transport system of this type. As the developers emphasise, the difference in feel is clear: from a "very unpleasant" experience, the journey in the capsule has become "much more bearable" and, in the long term, potentially comfortable.
Neuhausengroup, CC BY 4.0, via Wikimedia Commons
This technological breakthrough paves the way for the next stages of the project. Tests are already underway on a special 2-kilometre track in Shanxi province, where increasing speeds are being developed. In parallel, preparations are being made for the construction of a full-scale test section connecting Shanghai and Hangzhou. If all goes according to plan, the journey between the two cities - more than 200 kilometres apart - could take less than 10 minutes.
China's achievements in this field put it at the forefront of the global race to build the first operational Hyperloop. While other countries - including the US - face technical and financial hurdles, China is consistently developing the infrastructure and technology. The scale, pace of operations and progress in solving key problems mean that the commercialisation of the Hyperloop system in Asia may come sooner than was thought until recently.
If the current pace of development continues, a modern, ultra-fast transport system could become a reality before the end of this decade. Hyperloop is no longer a futuristic dream - it is becoming a viable alternative to high-speed rail and short-haul aviation.
We would like to invite you to take part in the XXIV edition of the photo contest, organised by DIPOL.
As every year, for almost a quarter of a century now, we invite you to a unique holiday tradition - to submit photos that show antennas in a completely new, creative light. These seemingly ordinary metal and plastic constructions can become heroes of extraordinary shots - all it takes is a little imagination!Take a look at the gallery from previous editions and let yourself be inspired - you will find there not only ideas, but also proof that an antenna can be... a real work of art. Show us your vision - we look forward to your take!
The works you submit will be judged by Mr Paweł Zechenter, a well-known photographer and filmmaker from Kraków. We are waiting for submissions until September 26th 2025.
Attractive prizes await the winners and runners-up:
- 1st place: DJI Neo drone
- 2nd and 3rd place: a set of TP-Link equipment: TAPO C110 camera and L920-5 LED tape
- distinctions: mugs from the DIPOL collection
Fibre terminations in RACK cabinets - OptiSteel switches and Ultimode accessories.
A consequence of the popularity of using RACK cabinets in teletechnical installations is the use of 1U RACK switches for terminating fibre optic cabling. DIPOL offers a full package of products enabling such terminations, regardless of the type of cable, fibres, connectors, etc. used.
The selection of the components necessary to realise the termination of the fibre optic cabling in the cabinet can be divided into several steps:
Step 1 - selection of switch
There is a choice between a cheaper solution, in which the mounting panel of the switch is not pulled out - fixed switches, and a slightly more expensive version with pull-out panel. The first option will work well where all the cable fibres are spliced together at once and there is little risk of future interference with the installation. Pull-out panels will be used when access to the fibres must also be provided during the service life of the installation.
In addition to the type of switch, the front panel version with which it is equipped must also be selected. There are usually 4 versions to choose from: 12-hole or 24-hole for SC simplex / LC duplex or SC duplex / LC quad adapters. This choice is of course dictated by the number of fibres in the cable that enter the switch and the type of connectors with which they are to be terminated.
In addition to the type of switch, the front panel version with which it is equipped must also be selected. There are usually 4 versions to choose from: 12-hole or 24-hole for SC simplex / LC duplex or SC duplex / LC quad adapters. This choice is of course dictated by the number of fibres in the cable that enter the switch and the type of connectors with which they are to be terminated.
Step 2 - selection of tack/splice cassette
In the case of OptiSteel switchgear, one of the three available weld cassettes can be selected:
- L5510 - basic tray / cassette for 12/24 splices
- L5512 - basic tray / cassette for 12/24 splices with red soft plastic baskets. Easier fitting of thicker splices covers.
- L5514 - tray / cassette SPT01 - a tray / cassette of slightly larger size, providing great convenience in fibre organisation. Possibility to arrange fibres in many ways, to separate cable fibres from pigtail fibres, etc.
Step 3 - selection of pigtails
DIPOL has a wide range of Ultimode brand pigtails. Select the correct connector and fibre standard to match the fibre in the cable being installed. It is permissible to "mix" fibre standards (e.g. combining G.652.D fibre with G.657.A1 or A2 fibre), but if there is a possibility of maintaining a uniform standard, this option should be used - it guarantees the lowest possible splicing attenuation. As far as connectors are concerned, SC and LC type connectors are the most commonly chosen. However, it should be remembered that the connectors in the switch do not necessarily correspond to those used in the active devices connected to the cable. In the case of different connector types, the connection can be realised with a suitable patchcord connecting the switch and the device.
A unique element of the offer are colour pigtail sets with universal single-mode fibres G.657.A1 enabling aesthetic termination of optical fibre routes. The colours can be used for quick identification of individual connections in large switching stations (no need for a visual fault locator to identify a fibre requiring re-wiring) or for identification of signals and services in a given fibre (e.g. camera 1, camera 2, etc.).
A unique element of the offer are colour pigtail sets with universal single-mode fibres G.657.A1 enabling aesthetic termination of optical fibre routes. The colours can be used for quick identification of individual connections in large switching stations (no need for a visual fault locator to identify a fibre requiring re-wiring) or for identification of signals and services in a given fibre (e.g. camera 1, camera 2, etc.).
Step 4 - selection of adapters
The adapters should be selected appropriately for the switch selected in step 1, namely the faceplate version, and for the pigtail connectors selected in step 3. It should be remembered that both connectors and single-mode adapters are available in two colours - green and blue. While in the case of connectors, the colour has a technical meaning (green APC connectors - ferrule ground at an angle, blue PC connectors - ferrule face straight), in the case of adapters, the colour is only information for the person connecting something to the switch about the type of connectors located on the other side of the faceplate. Care should therefore be taken to maintain an appropriate colour standard.
All of the above items can be selected conveniently in e-shop DIPOL using the appropriate filters in the respective category.
DVB-T2/C in optical fibre.
Service providers transmitting DVB-T2/C signals via optical fibre usually use traditional transmitters and optical receivers, e.g. transmitter mo418 R82522 and receiver OD-005P R81760. Such connections use only separate cables with single-mode fibres, and the division of the signal for delivery to different locations is performed using passive optical splitters.An alternative solution is to convert the DVB-T2/C signal (coming, for example, from a headend) into an IP stream, transmit it over a traditional fiber-optic network (so-called active Ethernet), and then convert it back into DVB-T form. For such signal conversion, you can use:
The IP stream itself can be transmitted via a fiber optic cable connecting any Ethernet devices - media converters, switches with SFP modules, etc. The advantage of such a solution is the possibility of transmission in both single-mode and multimode networks. Signal splitting is done on traditional switches, so in most cases there is no need to modify the existing network.
Transmission of DVB-T2 digital terrestrial television signals from four digital multiplexes over a distance of 20 km
using single-mode optical fiber.
using single-mode optical fiber.
Sunell surveillance system.
Sunell is one of the world leaders in the CCTV industry, offering a wide range of security solutions. Thanks to their high quality and reliability, the brand's products enjoy a well-deserved reputation and trust among installers and designers worldwide.The manufacturer's cameras are designed for a wide range of surveillance applications, regardless of the size of the installation. The devices have both basic, most commonly used functions and advanced algorithms to detect people and vehicles during motion detection and intelligent events such as line crossing or intrusion detection. The corridor mode allows the cameras to be used to monitor locations characterised by large size disparities: narrow and long or tall rooms/objects.
The NVRs are available in 4, 8 or 16 channel versions. They allow recording of video from IP cameras of up to 12 MP resolution. The devices support intelligent image analysis, artificial intelligence-based functions, as well as advanced camera solutions such as ANPR and thermal imaging. In addition, it supports intelligent motion detection on 4 channels independently.
1 or 2 SATA ports allow the connection of hard drives up to 8 TB. In the event of a memory overflow, automatic overwriting is triggered to prevent loss of the latest data. The 2 built-in USB ports allow you to plug in a pendrive or external drive and copy specific sections to external storage media and control with a computer mouse.
Information about the company and Sunell products.
Information about the company and Sunell products.
Two HDMI to IP converter transmitters on one network.
By default, there cannot be more than one HDMI transmitter H3614 ( H3613, H3606) on one network. This is due to the fact that the manufacturer has uploaded the same network configuration to each transmitter. The user is not able to make any address changes to the HDMI devices. Therefore, if two transmitters are used, there is an IP address conflict (resulting in incorrect network operation).To solve this problem, a managed switch should be used and dedicated VLANs created. In the example below, the user is able to create four video display scenarios by changing the switch parameters.
Connecting two HDMI transmitters in one physical network requires the use of a managed switch and the creation of dedicated VLANs.
The whole configuration of such a network consists of making the appropriate assignment of devices (specifically the switch ports to which the devices are connected) to the correct virtual networks (VLANs) for the scenario. For example, to perform the scenario in the graphic above, in which the image on receiver #1 comes from transmitter #1 and the image on receiver #2 comes from transmitter #2 and assuming that:
configure the switch with VLAN options as follows:
- H3614 SENDER #1 - is connected to 1 switch port
- H3614 SENDER #2 - is connected to switch port 2
- H3614 RECEIVER #1 - is connected to the 11th port of the switch
- H3614 RECEIVER #2 - is connected to switch port 12
configure the switch with VLAN options as follows:
- Port 1 - VID 11, PVID 11
- Port 2 - VID 22, PVID 22
- Port 11 - VID 11, PVID 11
- Port 12 - VID 22, PVID 22
 | Extender of LAN+PoE range ATTE ETH-ETH500-SET (1 port, 802.3bt, 10/100 Mbps) N29826 is a set of two extenders to extend the range of a PoE-powered LAN. When installed between any PoE switch and a PoE-powered IP camera, it allows the network range to be extended up to 800 metres using standard UTP cable. The kit should be used when the distance between the switch and the PoE receiver exceeds 100 metres. | |
 | The Signal Fire AI-5 L5872 fibre optic splicer is the entry-level model in Signal Fire's extensive range of splicers. It is designed for occasional splicing. It allows efficient implementation of fibre-optic connections in video surveillance, automation or fibre-optic local area networks. The device has all the features necessary to realise reliable splices with low attenuation. The 4 motors and the optical system with 300x magnification allow precise positioning of the fibres. The minimum splicing time is 8 seconds and the minimum weld shield welding time, 18 seconds. The AI-5 welder has a 5-inch TFT screen where the process and effects of splicing can be observed in detail. | |
 | OPTISteel 1U 19'' 24xSC simplex / LC duplex fibre optic switch black L51356 is designed for installation in 19" rack cabinets and racks. It allows for 24 or 48 fibre terminations. The front panel allows the installation of 24 SC simplex or LC duplex adapters. The switchgear is made of 1 mm thick steel sheet powder-coated in black. | |
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