Loading presentation...

Present Remotely

Send the link below via email or IM


Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.


Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks


No description

GwonYe Noh

on 17 September 2013

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Telephony

Timeline of Telephone
Step 1
1874 - Alexander Graham Bell had the idea for a telephone. Also, the telephone may be briefly described as an electrical contrivance for reproducing in distant places the tones and articulations of a speaker's voice.
Step 2
1888- William Gray created the first pay telephone, which people would use by putting coins into slots. Pay phone was installed by inventor William Gray at a bank in Hartford, Conn.
Step 3
1897- The first dial telephone was introduced by the Automatic Electric Company. The dial telephone system was installed in 1892 in LaPorte, IN. However, in 1897, model telephone appear but the rotary dial had not holes and it seems like gear teeth.
Step 4
1973- This was the year of the first cell phone call from a Motorola employee to an ATT&T employee.And then February of 1973, the Motorola had produced a working DynaTAC portable phone prototype.
Step 5
1983- The first commercial mobile telephone system was opened. The analog DynaTAC 8000X Advanced Mobile Phone System mobile phones as of 1983.
New High tech
Seo Yeon Choi, Ji Hyun Kim, Gwon Ye Noh 8B
Full transcript