Telex is used throughout the business world. While some businesses have switched completely over to Fax, the Fortune 500 companies tend to have a Telex number. The major news services still rely on Telex for bulletins and news, such as those sent out from API, the BBC and Reuters.

Telex is similar to teletype, except it is used over plain old telephone system (POTS) wiring. The name Telex comes from Teletype Exchange. The signals are sent using a frequency-shift keyed audio tone. Most Telex machines can type at 100 words per minute. Receiving Telex machines automatically print the incoming message, no human interaction is required. To send a message, the information is either typed on the keyboard or uploaded to memory. After the message is stored in memory, the operator dials the Telex number of the recipient and sends the message.

A standard Telex setup includes a teleprinter (teletype) and a special modem. The system is connected to a dedicated leased phone line used exclusively for Telex operation.

Update:
AT&T filed to discontinue landline Telex service in many states. Verizon dropped Telex in January 2008, as did MCI in most states. Since Telex is still heavily used in the shipping industry, the FCC has not acted on the request that AT&T filed. Many ships still rely on Telex and WeFax for weather updates while at sea.

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