Transcript Real-time communication

Real-time Communication
WeeSan Lee [email protected]
Async. vs Sync. Communication
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Asynchronous Communication (flex-time)
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Email, mailing list, newsgroup, blogging, forum,
etc
Synchronous Communication (real-time)
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IM, VoIP, etc
IM
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Instant Messaging
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Real-time text communication between 2 or more
parties
AKA chat programs
“IM” has become a verb
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“Please IM me.”
How does IM work?
IM Server
Hello
Hello
Hello
IM Client 1
IM Client 2
IM Client 3
IM - Examples
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talk, ntalk, ytalk on Unix
IRC
ICQ
AIM
Yahoo! Messenger
MSN Messenger
Google Talk
Jabber
Sametime
Gaim
IM - talk, ntalk, ytalk
IM - IRC
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Internet Relay Chat
One of the first multi-user real-time
communication
IM - Others
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ICQ
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AIM
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http://messenger.yahoo.com/
MSN Messenger
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http://www.aim.com/
Yahoo! Messenger
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I seek you
http://www.icq.com/
Windows Live Messenger
http://messenger.msn.com/
Google Talk
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http://www.google.com/talk/
IM - Others
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Jabber
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Sametime
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An xml-based IM
http://www.jabber.org/
An enterprise, java-based IM from Lotus/IBM
http://www.ibm.com/lotus/sametime
Gaim
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A unified messenger
Renamed to Pidgin
http://sourceforge.net/projects/gaim/
Features
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Online Status
Buddies (AIM), Contacts (MSN), Friends
(Yahoo)
Blocking
Private Chat Rooms
File Sharing
Whiteboard
Chat Etiquette
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Do not use all caps
Use emoticons to friends
Chat rooms are fraught with adult chat
IM in the Workplace
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Studies showed that IM improves productivity
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Among colleagues
Provides immediate support to the clients
Be aware of security issues
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Do not use public servers
VoIP
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Voice over Internet Protocol
Turns the analog signals of voice into digital
signals that can be transmitted over the
Internet
Requirement
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Microphone
Speakers/headphones
Full-duplex sound card
Use headset if possible
VoIP - Examples
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Most IM clients support VoIP
Others
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Netmeeting
Skype
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SkypeOut
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PCs → landlines
SkypeIn
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Landlines → PCs
VoIP (cont)
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Pros
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Inexpensive
Clear
Cons
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Unavailable when the network is down or power
outage
911 issues
References
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Internet Effectively
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Ch 11 - Real-time Communication
IM
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http://en.wikipedia.org/wiki/Instant_messaging
Homework 8
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Read "Whole Foods CEO Attacked Rival Online"
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Read "Whole Foods CEO sorry for anonymous Web
posts"
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http://www.cbsnews.com/stories/2007/07/12/business/main
3048457.shtml
http://www.reuters.com/article/businessNews/idUSN172536
0820070717?sp=true
Post your own comments in 100-150 words by
clicking on "Add a new question“ button below by
next Mon (11/19) @ 23:55pm
Reply one of the comments from others by next Tue
(11/20) @ 23:55pm.
Homework 8
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In general, is it ethical for a CEO of a
company to blog or post comments,
especially the bad ones, about its rivals on a
public forum anonymously?
Or, is it perfectly fine because the CEO is
exercising his/her freedom of speech? If this
is the case, do you think the comments
posted would be unbiased? Would they be
qualified as "insider" information?
Homework 8
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In the case of Whole Foods' CEO, he posted
bad comments about its rival a week before
Whole Foods announced to acquire it. Do
you think he blogged for personal gain?
The CEO of Whole Foods did not admitted he
had done anything wrong at first, a week
later, he apologized for what he did. Do you
think he should be punished?
Anything you could related to the 2 articles
above.