Manual Data communication methods use print forms, letters and face-to-face voice.
With the development of transmission and digital technologies Data communication is done more efficiently and fast.

Electronic and Digital methods

• Telephone
• Radio, TV
• Satellite
• ISDN, ADSL/DSL
• CDMA,, GPRS, GSM

Morse Code Machine

Analog Telephone Exchange

Modern Telecom Data Center

Optical Fiber Router