1) The role of the model is that in fact it is the modem that converts signals used in the computer to signals that can be transmitted over the ISDN, and vice versa.

2) Yes, ADSL requires a special modem. ADSL needs also a splitter that is installed outside the user's home or office and its goal is to separate voice transmissions from data over the copper line.
It is just like DSL, analog signals converted into digital ones!

If I am wrong somebody correct me pls

shall we buy an iphone? there is the answer!

Great iPhone Apps For Your Business

iPhone-loving business professionals can tap into corporate e-mail systems, customer contact lists, and accounting systems with these downloads from the iTunes App Store.

(click for image gallery)

Many business professionals who use Apple iPhones would love to use them like company-issued BlackBerrys or laptops so they could tap into such things as their corporate e-mail systems, customer contact lists, and accounting systems.

While options remain limited for using the iPhone like a networked computing client, they are expanding. Consider that when Apple's App Store went online in July, Oracle and Salesforce.com were the only enterprise software vendors with offerings at the site. Within the past few months, however, at least a dozen additional offerings have come online at the App Store that were designed to give iPhone owners a mobile channel into employers' computer systems.

By Mary Hayes Weier
InformationWeek
novembre 29, 2008 07:00 AM

Telecommunication - digital transfer

Modems enable computers to communicate with each other across telephone lines or over cable television network cables. In the strictest sense, a modem is a device that converts between analog signals, such as sound waves, and digital signals, which are used by computers.
Instead of converting between analog telephone lines and digital applications, Integrated Services Digital Network (ISDN) carries digital signals throughout the transmission process. Because an ISDN modem does not convert between digital and analog signals, it does not perform the modulation and demodulation.
Like ISDN, Asymmetrical Digital Subscriber Line (ADSL) permits the transmission of digital data over ordinary telephone lines.

Knowing that, my questions are:
1. What is the role of the modem in ISDN?
2. Does ADSL need a modem? (if the information is transmitted in a digital form it theoretically does not have to be demodulated or anything to be "read" by the computer)

Web 2.0 - RSS explained

Our own TV-channel

Hello People,

Last year the 2nd years had the opportunity to make a monthly newspaper (eseivision), but since that teacher is gone we don´t have that chance this year.

But what if we could start a new media channel for our school but using web2.0 tools.

I found this cool tool where you get your own online TV channel where you can broadcast whenever you want. Instead of the newspaper we could have the groups responsible for the "esei" TV channel on a monthly basis...

what do you think?

check the tool out

http://www.mogulus.com/

Telecommunitacion

A channel is a division in a transmission medium so that it can be used to send multiple streams of information. For example, a radio station may broadcast at 96.1 MHz while another radio station may broadcast at 94.5 MHz. In this case, the medium has been divided by frequency and each channel has received a separate frequency to broadcast on.

Now the question, is the channel or the frequency or none of them created by the router???

"Imagine a school with no books..."

New tools

I have been thinking about the plan for this class, seeing that there are only 2 sessions left (the 8th is a holiday). Today we will have the Telecommunications presentation, next week the Internet presentation. I know that we have Jooce to check out, this blog, maybe 43 things. And there is also RSS...

So, what are we doing next semester? The plan is to go back to more traditional tools, building blocks if you like; HTML, animations, a little Photoshop. But in the spirit of Web 2.0, what are you looking forward to? Is there anything we should cover that we haven't considered? Some of you have very good ideas, as I commented in the feedback. I would like to see written proposals for developing those further, ideas to give continuity to the projects (websites, web/pod casts, Web 2.0 tools). So your task (shall we call it "homework") for next week is to send an email with a short proposal to work on next semester. It could be related to the projects/topics/tools you presented, or something new, it's up to you.

Web 2.0

I actually agree that the blog will give us a more structured way of discussing about the web 2.0 tools we are learning in class, and all the topics we learn every class. For me as a student I agree that most of them are really useful and more these days as we have learned that everything is getting more on techonology. as Kattan said we were using it but without knowing really what were we using, I like the idea of studying like this is like a group-way of studying, but not as a physical group, it helps you to clarify your doubts in the moment and not waiting for the next day to see the person to ask a question that might not be nswered. For life, its actually updating us of what is happening around us. Business are using this and why not to start now and not to wait until we are out there wanting to use something in our business that we actually dont know. I find it really interesting and useful. Like everything not all the tools may be important for us right now, but knowing them at least will be helpful in any moment of our life.

ok

are we going to discuss something here?

another Web 2.0 tool!!!! 

OK!!

I also think it is a good idea to have a blog.
But what its purpose is going to be? I mean are we going to discuss things from school?

yeah!

ok pretty good idea for a blog mr kompen. and about web 2.0 at least for me was really good to have discuted this in class, not only because of the new tools we learned to use ( not all of them , but most) but also the fact to know what is exactly web 2.0 because i always used it (facebook and all that trash) and somehow interact with it but didnt knew it "existed".....

On Web 2.0 tools in our class...

Following Kattan's interesting introduction to blogs, I have been thinking about ways to incorporate blogs into our class. I don't think it's feasible for the time being to have 30 different blogs AND keep track of all them, let alone find the time to add content.

So I have created this "team blog" and sent invitations to everyone in the class. Maybe this will give our discussions more structure, so we don't have to depend on Twitter for long exchanges, thus keeping the flooding to a minimum.

Let's start the discussion, then. What do you think is the added value of Web 2.0 tools in this class, for yourselves as students, and for your life in general? Let's focus on those tools that are new to you.