Wassim

In this post, we will understand the nuances between the following concepts related to ISDN PRI: TDM links and interfaces T1, T1 PRI, E1, E1 PRI, ISDN BRI ISDN E1 PRI and ISDN T1 PRI E1 and T1 are two TDM technologies; they leverage Time Division  Multiplexing to transmit and receive information. E1 TDM link provides a total 2.048 Mbps bandwidth. T1 TDM link provides a total 1.544 Mbps bandwidth. Both the E1 TDM and the T1 TDM links are segmented into channels, or timeslots. Each timeslot allows a bandwidth of 64 kbps. E1 TDM and T1 TDM have been used in the past to carry digitized voice. But since carrying voice and data is the same thing -from a transmission perspective- then T1 TDM and E1 TDM have been leveraged to carry data, voice and even video. E1 TDM, T1 TDM and WAN Protocols E1 TDM and T1 TDM can be used to carry PPP traffic. Also, E1 TDM and T1 TDM are used as a Link Layer transport protocol for ISDN PRI technology. That’s why we find in literature E1 PR...

In this article, I’ll review the platform used in the Cisco On-Demand E-learning courses such as ICND1 v2.0, and ICND2 v2.0. Cisco E-learning platform prerequisites What you will need to learn in this course is a computer, a browser and an Internet connection. That’s all. You need to install nothing. It’s all in the web. That means you can access your learning environment from a PC, a smartphone, a tablet,…and have your learning environment accessible to you any time. Navigating the Cisco On-Demand E-learning Platform When you launch any Cisco on-demand E-learning course, you’ll find there are two main areas: the content area and the navigation area. The content area is where the course meat is. The navigation area contains the list of topics you will learn. There are also “Next” and “Back” shortcuts in the upper part of the content area. I took the example of the Cisco ICND1 v2.0 course and I broke down the...