Real-time Communication WeeSan Lee [email protected] Async. vs Sync.

Real-time Communication WeeSan Lee weesan@cs.ucr.edu Async. vs Sync.

Real-time Communication WeeSan Lee [email protected] Async. vs Sync. Communication Asynchronous Communication (flex-time) Email, mailing list, newsgroup, blogging, forum, etc Synchronous Communication (real-time)

IM, VoIP, etc IM Instant Messaging Real-time text communication between 2 or more parties AKA chat programs IM has become a verb Please IM me.

How does IM work? IM Server Hello Hello Hello IM Client 1 IM Client 2 IM Client 3 IM - Examples

talk, ntalk, ytalk on Unix IRC ICQ AIM Yahoo! Messenger MSN Messenger Google Talk Jabber Sametime Gaim

IM - talk, ntalk, ytalk IM - IRC Internet Relay Chat One of the first multi-user real-time communication IM - Others ICQ

AIM http://messenger.yahoo.com/ MSN Messenger http://www.aim.com/ Yahoo! Messenger

I seek you http://www.icq.com/ Windows Live Messenger http://messenger.msn.com/ Google Talk http://www.google.com/talk/ IM - Others Jabber

Sametime An xml-based IM http://www.jabber.org/ An enterprise, java-based IM from Lotus/IBM http://www.ibm.com/lotus/sametime Gaim A unified messenger

Renamed to Pidgin http://sourceforge.net/projects/gaim/ Features Online Status Buddies (AIM), Contacts (MSN), Friends (Yahoo) Blocking Private Chat Rooms File Sharing Whiteboard

Chat Etiquette Do not use all caps Use emoticons to friends Chat rooms are fraught with adult chat IM in the Workplace Studies showed that IM improves productivity

Among colleagues Provides immediate support to the clients Be aware of security issues Do not use public servers VoIP Voice over Internet Protocol Turns the analog signals of voice into digital signals that can be transmitted over the Internet Requirement

Microphone Speakers/headphones Full-duplex sound card Use headset if possible VoIP - Examples Most IM clients support VoIP Others

Netmeeting Skype SkypeOut PCs landlines SkypeIn Landlines PCs VoIP (cont)

Pros Inexpensive Clear Cons Unavailable when the network is down or power outage 911 issues

References Internet Effectively Ch 11 - Real-time Communication IM http://en.wikipedia.org/wiki/Instant_messaging Homework 8

Read "Whole Foods CEO Attacked Rival Online" Read "Whole Foods CEO sorry for anonymous Web posts" http://www.cbsnews.com/stories/2007/07/12/business/ main3048457.shtml http://www.reuters.com/article/businessNews/ idUSN1725360820070717?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 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 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.

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