Broadband is a wide bandwidth data transmission with an ability to simultaneously transport multiple signals and traffic types like Voice communication, Data Internet Etc.
Broadband commonly refers to high-speed Internet access that is always on and faster than the traditional dial-up access. Broadband Internet access is packaged with other services (such as voice telephone and home entertainment), price, and availability.
DSL (Digital Subscriber Line) / ADSL (Asymmetric Digital Subscriber Line)
- DSL is the technology most commonly used by local telephone carriers for providing high-speed data services. DSL electronically enhances the conventional copper telephone voice line, enabling it to simultaneously provide both voice service and high-speed data traffic.
- While there are a number of variations of DSL, the most common residential service is asymmetric DSL, or ADSl. The service is asymmetric because it typically provides download speeds that are faster than the upload speeds.
- Conventional ADSL services offers downloads speeds up to 7 Mbps and upload speeds of up to 1 MBs. Newer technologies being deployed can support download speeds of 20-30 Mbps.
- Service is usually available only within about 18,000 feet of a telephone company central office. In addition, the available data speed is affected by the distance from the EXCHANGE/ISP – the closer you are, the higher the data speed.
- At the EXCHANGE/ISP, the broadband service is connected to the Internet via a DSL Access Modem, or DSLAM. The user connects to the broadband service via a DSL modem.
- ADSL offers speeds of up to 8Mbps (Megabits per second) downstream and 448Kbps upstream (832Kbps on business lines).
- The latest ADSL2+ (ITU G.992.5) technology is capable of pushing download speeds at up to 24Mbps and uploads at up to 1.4Mbps, it also supports port bonding (linking several lines together for faster speeds) and has an improved range over ADSL.
Connecting diagrams From Home to Exchange (ISP)
How it’s working?
After connecting the MODEM, Telephone, Computer in similar to the below shown layout, you are done with physical connectivity in User /customer end.
Once you turn “ON” the MODEM/ROUTER power LED indicates first then ADSL/DSL LED flashing / flickering continuously for few seconds / minute. LED flickering indicates the modem/router synchronising with the DSLAM for verification of Username and password (which is provided by ISP) once verification completed MODEM/ROUTER LED will stops flickering and glows continuously(READY state).
After ADSL getting in to ready state, the MODEM/ROUTER transmits the first data to ISP Core Switch/Router which will enable the session to connect with the internet through available public IP Address. When you start browsing, the internet LED starts flickering (depends upon the Data Packets Flow) in order to establish a connectivity, if there is no data traffic then the LED will glow continuously.
Back end working Details of ISP(Internet Service Provider)
The DSLAM typically sits in exchange/ISP; It takes the traffic from many ADSL customers and aggregates it into a single high speed link. From there it can be transported via Metro Ethernet network.
Telecom uses Carrier Ethernet technology called Metro Ethernet for its metropolitan area networks (MANs).
This network transports traffic from the Exchange/DSLAM to a broadband remote access server (BRAS).
The broadband remote access server (BRAS) or Broadband Network Gateway (BNG) routes the traffic from and to the DSLAM. The BRAS further serves as the interface to authenticate ADSL subscribers, and for authorization and accounting systems.
IP Connect (IPC) provides connectivity from its IPNet to an Internet Service Provider’s network. In basic terms, it passes on the traffic from telecom network to the ISP’s network.
Internet Service Provider
After the Internet Service Provider receives the ADSL traffic of a subscriber via telecom IP Connect service, it must provide Internet services to this user. This means the user’s traffic passes through national, and possibly international, networks to connect to the services required. The ISP also performs accounting and related services.
International Internet and data centre
The traffic is carried via international networks to the required destination – typically a data centre which hosts the website or Internet service which the user wants to use.
Broadband Telephone (Land Line)
The Part in broadband connection is voice communication if user/customer using ADSL /DSL connection then the basic need will be the telephone instrument which is mandatory. Voice communication is transmitted in Analog signal through RJ11 from phone to splitter.
Then the voice signal is transmitted to exchange and it reaches PSTN (public switched telephone network). PSTN is the world’s collection of interconnected voice-oriented public telephone networks, both commercial and government-owned. After PSTN process it will connect the destination telephone number / Mobile number, also refer (How a Call Is Made from Mobile Phone).
WIMAX on Broadband
- Worldwide Interoperability for Microwave Access
- Is a certification mark for products that pass conformity and interoperability tests for the IEEE 802.16
- provides wireless data over long distances in a variety of ways, from point-to-point links to full mobile cellular type access
- Faster than broadband service
- Cable less connectivity which intern reduces cost
- Easier to extend to suburban and rural areas
- Broad coverage
- Much wider coverage than WiFi hotspots
For more detailed information refer our topic (WIMAX Technology & Its Functionality).
Hopefully you would have gained knowledge on Broadband, the more you know the more you share for others to increase their knowledge.
- The Introduction to Wireless
- Smartphone’s Internet Technology
- How A Call Is Made From Mobile Phone
- What Is Spectrum all About??