|
|
Featured Products:
| 
|
PrismX™ - GUI Development
The PrismX™ development package is a professional quality graphical user interface toolkit created to meet the needs ...
NetX®
Express Logic's NetX is an extremely small, highly optimized TCP/IP network stack for use with the ThreadX® RTOS.
NetX ...
FileX®
FileX® is a high-performance MS-DOS FAT-16/FAT-32 compatible file system, fully integrated with ThreadX.
FileX combines ...
|
|
|
|
| |
Advertise here! |
eg3 connect
Got talent? Need VC / Angel Funding? If you are an entrepreneur with a great idea, or a VC / Angel investor looking for the brightest new people with the best new ideas in electronics - check out our 'eg3 connect' microsite!
 | |
 |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
overview
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
Integrated Services Digital Network or Isolated Subscriber Digital Network (ISDN), originally "Integriertes Sprach- und Datennetz" (German for "Integrated Speech and Data Net"), is a telephone system network.
Prior to the ISDN, the phone system was viewed as a way to transport voice, with some special services available for data.
The key feature of the ISDN is that it integrates speech and data on the same lines, adding features that were not available in the classic telephone system.
There are several kinds of access interfaces to the ISDN defined: Basic Rate Interface (BRI), Primary Rate Interface (PRI) and Broadband-ISDN (B-ISDN). ISDN is a circuit-switched telephone network system, that also provides access to packet switched networks, designed to allow digital transmission of voice and data over ordinary telephone copper wires, resulting in better voice quality than an analog phone.
It offers circuit-switched connections (for either voice or data), and packet-switched connections (for data), in increments of 64 kbit/s. Another major use case is Internet access, where ISDN typically provides a maximum of 128 kbit/s in both upstream and downstream directions (which can be considered to be broadband speed, since it exceeds the narrowband speeds of standard analog 56k telephone lines). ISDN channels may use bonding to achieve a greater data rate, typically 3 or 4 BRIs (6 to 8 64Kbps channels) are bonded.
Source: Wikipedia (http://en.wikipedia.org/wiki/Isdn)
Here are the best overviews and tutorials for isdn:
- tutorial, 3 stars
-
ISDN Tutorial
This tutorial will cover the basics of ISDN.
Topics covered will include: * What is ISDN? * What is ISDN's history? * Why use ISDN? * What are BRI and PRI? What are Channels? * What do the layers look like? * What protocols are used? * What happens when a call is set up? * How can I get more information?
To browse all sites for 'ISDN,' click
here
.
| |
