Our business is based primarily on the telecommunications sector in which we do planning and construction of: telecommunications access networks, optical cables for trunk-, main- , and international distances, cable TK sewage, hybrid fiber-coaxial networks for the construction of cable distribution systems (KDS).

By employing mechanical engineers, training the staff and purchasing the necessary machinery and equipment, we expanded our business activities and enabled ourselves to perform construction and mechanical works, building gas distribution networks and household gas connections.

The requirements of today's information society based on IP protocol are going in the direction of a continuous increase in bandwidth. Optical networks have the potential to meet these growing requirements:

• large bandwidth, theoretically limited by the speed of light within the fiber;
• high-quality transmission,
• insensitivity to interference,
• little attenuation,
• insensitivity to electro-magnetic effects,
• inability to crosstalk,
• large factory length of cables,
• flexibility,
• small size and weight,
• universal applications: from local networks to trunk and international cables;
• low prices.

  In the past years, all major ways of our country's transportation networks have been connected by fiber cables. Overcoming the so-called "last mile" to the user is a problem, and the solution to it, in most advanced countries, is in introducing the ‘FttH - Fiber to the Home / Premise’ and the subsequent implementation of the GPON protocol (Gigabit Passive Optical Network - 2.5 Gbit/s downstream/
1.25 Gbit/s upstream - typically 73Mbit/s / 35Mbit/s on the user’s side).

  ‘Kablprojekt’, in the field of fiber optic cables, deals with the design and procurement of necessary materials, complete construction and assembly works (laying pipes, insufflation and insertion of optical fibers, splicing cable stocks, terminating cables at end-stations, making protocols for measuring the optical characteristics of cables and producing the technical documentation of the derived condition).

Clicking on these links you can view the presentations in Power Point (.ppsx):

Micro cabling.ppt

In the last few years, optic cables with strings of fiber arranged in the tubes as well as those with the fibers packed in ribbons are produced as so-called mini-cables.

Optical mini-cables and mini-tubes present an innovation in the technology of fiber optic cables and are suitable for increasing the capacity of existing cables, as well as to provide quick and easy upgrades for future cables. Mini-tubes come in various sizes and their diameter ranges from 3 mm for FTTH applications (Fiber to the Home) to 12 mm for use in the main planes of optical systems. A mini-tube can be installed into a standard PE pipe of a fi 40 or 50 mm diameter by blowing compressed air into it. The casing of mini-cables is made of high density polyethylene (HDPE) with the aim of reducing the friction resistance on the inner surface as much as possible. The smallest mini-tubes can hold a mini-cable made of 2 optic fibers, while the largest has the inner diameter sufficient for blowing in a mini-cable with 96 fibers.

Cables may include optical fibers that work either by ITU-T G.652, or G.653 or G.655 standards; they can be single-mode or multimode, with moved or zero dispersion, also within the mini-cable they can be combined with other types of fibers in any way required. Mini-cables are made with dielectric or reinforced, metal casing.

The main advantages of using mini-cables:

• Using existing pipes significantly reduces the costs – no need for requesting licenses and approval from institutions again, there is no unpacking and laying of pipes – It optimizes the utilization of existing pipes occupied by copper or optical cables with the possibility of blowing mini-cables into them.
• Installation of only the number of optic fibers that is necessary at the moment; the system provides an easy upgrade if there is a need for it
• Lower initial costs mean more optics / km from the same budget-plan
• The possibility of an easy adaptation to new trends in optical technology - in the future, new types of fibers can be easily installed into available mini-cables
• Enormous flexibility and scalability of network architectures

‘Kablprojekt’ uses the most modern equipment for laying mini-cables, for insufflation of optical mini-cables, and splicing cable stocks, also the most recent equipment for testing and measuring the technical characteristics of optical fibers.

In many countries of the world, there is a large number of Hybrid Fiber Coaxial (HFC) two-way cable distribution systems currently in the function which supply users with a large number of analog and digital TV channels and radio programs downstream from the Head-End to the user and various interactive services upstream from the user to the main station by the defined frequency plan.

Interactive two-way cable distribution systems allow transmission in the frequency range 85-862 MHz in the distribution direction (downstream), and in the range 5-65 MHz in the return direction (upstream). The two-way CATV network consists of several segments as follows:

• Antenna system
• Receiving station of terrestrial and satellite TV programs(HE – Head End)
• Optical transport system
• Coaxial-distribution network
• Coaxial-distribution layout in buildings

Such a system gives users the ability to use more interactive services such as:

• HDTV (High Definition Television)
• Fast Internet
• IPPV (Impulse Pay Per View)
• VoD (Video on Demand)
• Information on demand
• Interactive Games
• Telemetry
• Functions of the control and security of the facility

For the needs of PTT KDS, ‘Kablprojekt’ created a main project, it completed the construction and installation of a cable distribution system in the municipality of Rakovica and is managing the maintenance of the set cable systems in the area. In the area of KDS Rakovica, the acquisition and installation of a digital main station is executed, which allows transmission of digital TV signals. We have installed hubs in Bezanija, Novi Beograd and Miljakovci. A so-called PayTV system has been mounted, and also a system for the management and monitoring of KDS.

We perform the construction and assembly works for the laying of telecommunications cables in the access networks (copper and optical cables). We have the necessary machinery for the setting of concrete bastions – for outlets or for building an air distribution network. We do montage work on the indentation and laying of cables, on installing outlet source boxes for underground distribution networks, making extensions to all types of copper cables, making the protocol of measurement of copper cables and production of technical documentation of the derived condition. Our company was engaged in the construction of several thousand kilometers of access networks in all parts of Serbia; from Subotica, Kikinda and Sombor in the north, to Mitrovica, Prokuplje and Nis in the south, from Prijepolje, Valjevo and Loznica in the west, to the Iron Gate and Pirot in Knjaževac in the east. In general, wherever one lives in Serbia, he can be sure that our colleagues contributed to the construction and reconstruction of telecommunication access networks in that region.

‘Kablprojekt’ Ltd, among other things, deals with:

• Construction of gas distribution networks (DGM)
• The construction of household gas connections (KGP)
• Development of project ideas (KGP) and the state of built gas distribution networks

  
The distribution pipeline (a local, medium pressure gas pipeline (from 8-12 bars)) is a gas-distribution network that is separated from the main gas pipeline through the main measuring and regulating stations and is distributing gas to the consumers.

The home port is the pipeline from the street distribution network to the main valve (gas valves) with the insulating flange on the home measuring and control set.