The network technologies we loved those years
Over those years, there are several competitive kinds of network access technologies, which, considering the medium, can be divided into the following groups:
1. Copper cable technology:
- Satellite communication(TV)
2. Wireless technology:
3. Optical fibre technology:
Do you know all of the following technologies or solutions? what are the advantages of your favourite network technology?FOT is sharing full series knowledge of the those fixed broadband or wireless network technologies to you, hope you may like it.
Digital subscriber line (xDSL, like ADSL/VDSL etc) is a technology used by traditional telephone companies to deliver advanced services (high-speed data and sometimes video) over twisted pair copper telephone wires.
- works in the already existing copper cable networks
- variety of versions allows to diversify the offer according to customer needs
- It typically has lower data carrying capacity than HFC networks and data speeds can be range-limited by line lengths and quality.
PLC (Power Line Communication)
Another access technique is DPL/PLC network (Digital Power Line/Power Line Communication), where power network is also the transmission medium. Maximum transmission speed is 24 Mbps, and maximum range – 250 meters.
- works in the already existing power network infrastructure
Direct-broadcast satellite television comes to the general public in two distinct flavors: analog and digital. This necessitates either having an analog satellite receiver or a digital satellite receiver. Analog satellite television is being replaced by digital satellite television and the latter is becoming available in a better quality known as high-definition television.
Satellite advantages: satellite systems are attractive in rural areas and other environments with insufficient or no deployed terrestrial infrastructure.Satellite television competes very well with HFC networks in delivering broadcast video services.
Today most traditional cable systems have been upgraded to “Hybrid Fibre-Coax” systems.Hybrid fibre-coaxial (HFC) is a telecommunications industry term for a broadband network that combines optical fiber and coaxial cable. It has been commonly employed globally by cable television operators since the early 1990s.
TV signal and data transmission via the same medium, quite popular in cities and towns.
This technique is highly popular in community networks. The data transmission medium between buildings is optical fiber, while between subscribers – 5th category twisted-pair cable. Low costs make this solution popular either in home networks and in companies.
- low costs,
- wide range (up to dozen of kilometers),
- transmission speed: 1 Gbps in network backbone, 100 Mbps between subscribers,
- ease of use
Wireless LAN network (Wireless Local Area Network) works on radio waves. IEEE (Institute of Electrical and Electronics Engineers) have defined three wireless network standards:
* 802.11b: 2.400 – 2.4835 GHz band; transmission speed up to 11 Mbps
* 802.11a: 5.150 – 5.825 GHz band; transmission speed up to 54 Mbps
* 802.11g: 2.400 – 2.4835 GHz band; transmission speed up to 54 Mbp
- flexibility and easy change of base station location
- alternative to traditional networks, especially where they are not allowed or profitable
- easy modification and expansion.
Analogous to HFC, fiber in the loop (FITL) technology is used by telephone local exchange carriers to provide advanced services to telephone customers over the plain old telephone service (POTS) local loop.
In the 2000s, telecom companies started significant deployments of fiber to the x (FTTX) such as passive optical network solutions to deliver video, data and voice to compete with cable operators.
RFoG (radio frequency over glass) is a deep-fiber network design in which the coax portion of the hybrid fiber coax (HFC) network is replaced by a single-fiber passive optical network (PON).
There are two popular architectures used with FTTH point-to-point (P2P) connectivity architecture and Point to Multi-Point (P2M)/ Passive Optical Network (PON) connectivity architecture.
FTTH P2P advantages:
Easy to configure and plan Future proof Offers subscribers dedicated bandwidth based on their individual requirements and offers differential services for residential and business customers in the same area. Flexible and can be built with ring redundancy as well as combination of other topologies. Long reach.
FTTH P2MP advantages:
Providing large bandwidth capacity especially for data services;Pure fiber network investment with high ROI,saving enery and money etc.