Presentation on theme: "ISDN RAHUL BHALLA. What is ISDN? ISDN (Integrated Services Digital Network ) is comprised of digital telephony and data-transport services offered by."— Presentation transcript:
What is ISDN? ISDN (Integrated Services Digital Network ) is comprised of digital telephony and data-transport services offered by regional telephone carriers. Ex- Verizon, T-Mobile etc. ISDN includes the digitization of the telephone network, which permits voice, data, text messages, graphic games, music and video which can be transmitted over existing telephone wires. ISDN is today known as the fastest way to go online.
Channels? Not TV!!! Not TV!!! ISDN features two channels to perform at its best. ISDN features two channels to perform at its best. B-Channel B-Channel D- Channel D- Channel
B- Channel B-Channel is known as bearer channel. The B-Channel is used for transferring Data, voice, text and video. The B-channel transmits the data at the speed of 64 kbps. But as we know as the technology advances, the speed will increase.
D-Channel D-Channel currently known as Delta channel. D-channel is used primary for only communication or signaling. The D-channel transfer its voice data on either 16kbps or 64kbps.
ISDN channels and its Interfaces Now to transfer ISDN channels to its user, it also requires one or two design. A it could be BRI (Basic rate interface) B it could be PRI (Primary rate interface) BRI is used mostly by people who wants to connect to the internet using ISDN. This interface uses two 64kbps and one 16kbps over a standard household phone line.
PRI VS BRI PRI is primary used in big business because of communication needs plus its also expensive. This interface uses twenty three 64 kbps and one 64 kbps from D-Channel over standard phone line. BRI is the most common service provided by ISDN towards its user. The reason why its more common is because of holding three calls at the same time. Ex- fax
FACTS ABOUT ISDN Cost less Cost less More efficient More efficient More reliable More reliable AND FAST AND FAST 128 kbps meaning more than 4x as fast as a 28.8 kbps modem on a standard phone line. 128 kbps meaning more than 4x as fast as a 28.8 kbps modem on a standard phone line.