DIPOL Weekly Review – TV and SAT TV, CCTV, WLAN

Most efficient undersea fiber optic cable.

Aqua Comms, Meta, Microsoft and Vodafone announced the completion of the Amitié undersea cable, which directly connected Boston in the United States with Bordeaux, France. The 6,783-kilometer transatlantic cable was built by the company Alcatel Submarine Networks. It has 16 pairs of optical fibers and enables transfers at a record commercially available capacity of 400 Tbps. Amitié is the most efficient intercontinental cable ever.

The new connection will provide all users with additional connectivity options in the United States, the United Kingdom and France. Moreover, a new exchange center (a place where telecommunications and Internet service providers (ISPs) can deliver their services and connect infrastructure) will be established in Bordeaux. This will provide greater reliability in terms of bandwidth over a wide variety of routes.

Studies have shown that transcontinental cables can have a positive impact on national and regional economies. Submarine cables, such as the Amitié cable, can accelerate the development of onshore IT infrastructure which will also contribute to economic growth. For example, according to information from RTI International, the Meta company and Microsoft's investment in the Marea cable (another transatlantic cable) has contributed about $18 billion in annual economic growth in Europe as of 2019.

Sunell monitoring system

Sunell is one of the world leaders in the CCTV industry, offering a wide range of security solutions. With their high quality and reliability, the brand's products enjoy a well-deserved reputation and trust among installers and designers around the world.

The manufacturer's cameras are designed for a wide range of surveillance applications, regardless of the size of the system. The devices have both basic, most commonly used functions and advanced algorithms for detecting people and vehicles during motion detection and intelligent events like line crossing or intrusion detection. Corridor mode allows the cameras to be used to monitor areas with 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 enable connection of hard drives with a capacity of up to 8 TB. If the memory is full, automatic overwriting is triggered to prevent the loss of the latest data. Built-in 2 USB ports allow you to plug in a memory stick or external drive and copy specific sections to external storage media and control with a computer mouse.
Information on the company and Sunell products.

Fiber optic categories and designations.

When studying fiber optic network design documentation, one will come across many designations for fiber optic cables and fibers. There are several popular styles of fiber naming. Some of them come directly from the designations proposed by standards and recommendations. Others are a confusion of these designations with abbreviated descriptions on the outer sheaths of cables.

The best-known way of describing fibers comes from a series of recommendations of the ITU-T organization. This naming and categorization method (G.65xx) can be found most often in catalog data offered by fiber optic cable manufacturers and vendors. On the other hand, designers of telecommunications networks, when describing cabling issues in detail, can use a European standard issued by the IEC to describe fibers: EN 60793-2-50. According to it, single-mode fibers are category B, while multimode fibers are category A1. Each category, of course, also has subcategories, the equivalents of which can be found in the IUT-T recommendations.

The third and final way is through designations introduced by the company standards of large telecommunications operators. Within their own networks, they may use alternative designations to those proposed by the standards. An example is Orange, which has introduced the "J" category for single-mode fibers, along with the corresponding subcategories.

For multimode fibers, ITU-T has issued one recommendation: G.651.1 while not proposing a subcategory of these fibers (the recommendation refers to other documents in this regard). The most popular classification of multimode fibers is introduced by the structured cabling standard ISO/IEC 11801. Designations: OM1, OM2, OM3, OM4 and OM5 are described in this very document. A much less popularized (but still found) way of marking multimode fibers is included in EN 60793-2-10. These are respectively: A1b for OM1 fibers, A1a1 for OM2 fibers, A1a2 for OM3 fibers and A1a3 for OM4 fibers.

Coaxial cable and twisted pair cable in B2ca flammability class.

Within the European Union, all installation cables in buildings are considered construction products subject to regulation. The CPR Directive requires manufacturers to develop and make available the Declaration of Performance (DoP), as well as to mark products covered by the relevant CE mark. The EN50575 specifies the requirements for: performance in fire conditions, test and evaluation methods for power, control and telecommunications cables used in buildings with a specific fire resistance class. With the introduction of pan-European fire response classes, designers and architects have clear regulations specifying the rules for selecting cables. To achieve increased fire safety levels, the regulations recommend the use of B2CA cables in special buildings that must meet very tight safety requirements (e.g. in hospitals, nurseries, high-rise buildings, office buildings and nursing homes).

Antenna cable for LTE/5G routers.

Antennas used to improve a mobile operator's signal have an impedance of 50 ohms, so every part of the radio path must have this impedance value (TV coaxial cable is not allowed as it has an impedance of 75 ohms). The exemplary cable used to extend the antenna cable is the Tri-LAN 240 E1171. When it comes to connectors, most often the antenna cable is terminated with an SMA connector, to which you can plug an additional antenna connector dedicated to a specific modem.

When selecting an external antenna, check whether the modem supports MIMO (two antenna connectors) technology. These types of modems require the use of appropriate antennas to ensure that the transmission channel bandwidth is maintained as high as possible. Two coaxial cables should be run from the MIMO type modem to the antennas.

The most common in modems are SMA connectors, then, for example, the A741024 antenna connector fits directly. If the modem has a TS5 connector, the E83201 connector is required, while for the TS9 connector, the E83206 connector is required.

Powering the switch and cameras without access to power, the "Powered Device" function. ULTIPOWER 352SFP PoE Switch N299707 has a PD function. which allows it to be powered by connecting to another PoE switch. This function is particularly handy when only one twisted-pair cable is connected to the switch installation site (and the cameras, if installed in the same place, e.g. on a pole)...>>>więcej