The first telephone call was made on March 10, 1876, by Alexander Graham Bell. Bell demonstrated his ability … See more

A telephone call may carry ordinary voice transmission using a telephone, data transmission when the calling party and called party are using modems, or facsimile transmission when they are using fax machines. … See more

Some types of calls are not charged, such as local calls (and internal calls) dialed directly by a telephone subscriber in Canada, the United States, Hong Kong, United Kingdom, Ireland or New Zealand (Residentia… See more

A typical phone call using a traditional phone is placed by picking the phone handset up off the base and holding the handset so that the hearing end is next to the user's ear and the speaking end is within rang… See more

Preceding, during, and after a traditional telephone call is placed, certain tones signify the progress and status of the telephone call:
• a dial tone signifying that the system is ready to ac… See more

Unsolicited telephone calls are a modern nuisance. Common kinds of unwanted calls include prank calls, telemarketing calls, and obscene phone calls.
Caller ID provides some protection against unwanted c… See more

• Rabinow, J., U.S. patent 2,813,154 - "Telephone call indicator"—November 12, 1957 See more