BROADBAND

PRESENTED TO:Mr. Ajay Suri Head of Electronics Deptt.

PRESENTED BY:
Ritika Gupta B.Tech E.C. (IV year) Roll no. 0832831037

CONTENTS

Companys Profile What is broadband? Features Technology used in broadband. Digital Subscriber line (DSL) Service Providers in MTNL Broadband network components Controlling Service Access Advantages & Disadvantages Applications

Institute of Telecom Technology & Management ( A Unit of MTNL, DELHI)

MTNL set up on 1st April, 1986 by Govt. of India to upgrade quality of telecom services, to expand the telecom network, to introduce new services and to raise revenue for telecom development needs. MTNL achieved a market share of approx. 13% of Indian telecommunication network. Today, MTNL is the no. 1 telecommunication company and the largest public sector undertaking of India

MTNL PROFILE

Its responsibilities includes : a) improvement of the quality of telecom services, b) expansion of telecom services in all villages and c) instilling confidence among its customers.

MTNL SERVICES Internet Services Intelligent Network ISDN Dolphin Mobile (GSM) Answering Service Leased Circuit Trunk Service

WHAT IS BROADBAND?

It refers to a telecommunications signal or device of greater bandwidth. It allows voice, data & video to be broadcasted over same medium at the same time. An always-on' data connection that is able to support interactive services. Has the capability of minimum download speed of 256 kbps to an individual subscriber from the Point Of Presence (POP) of the service provider. It provides Internet, IPTV and VoIP simultaneously along with basic telephone service.

FEATURES

Broadband connectivity Broadband availability Broadband Bandwidth Prepaid and Postpaid service Static IP on demand

TECHNOLOGY

Optical Fibre Technologies a) Hybrid Fibre Coaxial (HFC), b) Fibre to the Curb (FTTC) and c) Fibre to the Home (FTTH) networks Digital Subscriber Lines (DSL) on copper loop Cable TV Network Satellite Media Terrestrial a) Very Small Aperture Terminals (VSAT) and b) Direct-to-Home (DTH) services Terrestrial Wireless: - Wi-Fi systems, WiMAX 3G Personal communication system e.g. UMTS, HSDPA, HSUPA, CDMA 1X EV-DO etc.

DIGITAL SUBSCRIBER LINE (DSL)

It is a telecommunications service that makes it possible to transform an ordinary phone line into a high-speed conduit for data, voice and video. DSL does not refer to a physical line but to a Modem or rather a pair of Modems. DSL technology uses existing twistedpair telephone lines to transport highbandwidth data, such as multimedia and video, to service subscribers. Allow users to receive data at 1.5 Mbps and send data at approx 256 Kbps. DSL service is always on. It even allows users to use the same line for voice and data traffic.

TYPES OF DSL
Two types of DSL: Asymmetric DSL and Symmetric DSL. Asymmetric DSL (ADSL) This connection gives the consumer more bandwidth when it comes to downloading as compared to uploading. This technology is best used by residential customers The normal rate for downloading is at 5 Mbps and 1 Mbps when uploading. Examples of Asymmetric DSL are: RADSL, VDSL Symmetric DSL (SDSL) This connection have equal bandwidth for upstream and downstream activities. Symmetric DSL connections are more popularly used in business. Normally, Symmetric DSL can offer up to 1.5 Mbps both for download and upload. Examples of Symmetric DSL are: HDSL and SHDSL .

xDSL

xDSL, is a family of technologies that provides digital data transmission over the wires of a local telephone network. Two other types of xDSL technologies are: High-data-rate DSL (HDSL) and Very high DSL (VDSL). xDSL is similar to ISDN in as much as both operate over existing copper telephone lines and both require the short runs to a central telephone office. However, xDSL offers much higher speeds - up to 32 Mbps for upstream traffic, and from 32 Kbps to over 1 Mbps for downstream traffic.

ADVANTGES OF DSL TECHNOLOGY

DSL is more cost-effective. Increased Bandwidth capacity in the existing infrastructure. The speed is much higher than a regular voice band modem. Voice and data can be transmitted at the same time. Very Secure and reliable.

SERVICE PROVIDERS IN MTNL,DELHI

Ericsson Huawai (Sterlite ) Alcatel Lucent

BROADBAND NETWORK COMPONENTS

DIGITAL SUBSCRIBER LINE ACCESS MULTIPLEXER (DSLAM)

It is a network device that receives signals from multiple customer DSL connections, puts signals on a high-speed backbone line using multiplexing techniques. Depending on the product, DSLAM multiplexers connect DSL lines with some combination of ATM or IP networks. When the phone company receives a DSL signal, an ADSL modem with a POTS splitter detects voice calls and data. Voice calls are sent to the PSTN, and data are sent to the DSLAM.

BROADBAND REMOTE ACCESS SERVER (BBRAS)

It is the piece of equipment that sits between the DSLAM and ISP. It may be in local exchange or it may be elsewhere in service provider's network. Single BBRAS will probably handle connections from several DSLAMs. A BRAS is a multi-service access node able to manage IP service access for a large number of subscribers.

INTERNET SERVICE PROVIDER (ISP)

BBRAS are connected to ISP. This is the place where the connection to the Internet is made. The ISP usually provides other services like mail and news servers, and may cache frequently-used pages from the Internet so that the access can be more quickly. The ISP treats ADSL connections exactly the same as connections made using ordinary Dial-up modems or ISDN.

CONTROLLING SERVICE ACCESS

Authentication Authorization Accounting

ADVANTAGES OF BROADBAND INTERNET ACCESS

Connection speed is up to 100 times faster than dialup connection. Use the same phone line for both voice/fax and data transmission. The internet connection is always on. Need not to dial an access number and risk getting a busy signal. Broadband internet offers unlimited access and you won't be charged based on the connection duration. Broadband internet gives high speed internet access, It can also provide cheap phone services via VoIP technology.

DISADVANTAGES

High monthly fee compared to dialup internet access. Higher security risk than dialup connection. A personal firewall is needed to protect your computer. Not all phone wires are equipped for DSL service. Not all cable TV networks are equipped for cable internet access. May not be available in rural or remote areas.

APPLICATIONS
Broadband applications are categorized into two parts: a) Broadband telephony: This is more popularly referred as 'VoIP', 'Internet telephony', 'IP Telephony', 'Broadband Phone', or 'Voice over Broadband'. b) Broadband radio: Also known as Internet radio. Some applications are: Voice over IP Internet television IPTV Internet Radio