Search results
Results from the WOW.Com Content Network
A ring generator or ringing voltage generator is a device which outputs 20 cycle sinusoidal AC at up to 110 volts peak to power bells or annunciators in one or more telephone extensions. [4] The output stops if a handset is taken off the hook. In terminology devised by phone phreaks, a ringing generator is a magenta box.
"If you'd like to make a call, please hang up and try again. If you need help, hang up and then dial your operator. This is a recording."). A single burst of off-hook tone is sometimes used to indicate to a party that the call is being transferred, notably at 1-800-BELL-SOUTH (800-235-5768).
On hook telephone handset. The term on-hook has the following meanings: . The condition that exists when a telephone or other user instrument is not in use, i.e., when idle waiting for a call.
In many cases, the cadence consists of a double ring of 0.4 seconds separated by 0.2 seconds, and a two second pause after which the cadence repeats (0.4s on, 0.2 s off, 0.4 s on, 2 s off). In many cases the tone is a combination of 400 Hz and 450 Hz sine waves.
Usually, this means that the caller just stops dialing at seven digits after the area code or that the extra digits are ignored by the telephone exchange. In early cell phones , or feature phones , the letters on the keys are used for text entry tasks such as text messaging , entering names in the phone book, and browsing the web .
A soft dial tone or express dial tone may be used when no actual service is active on a line, and normal calls cannot be made. It is maintained only so that an attached phone can dial the emergency telephone number (such as 911, 112 or 999), in compliance with the law in most places.
Landline service is typically provided through the outside plant of a telephone company's central office, or wire center. The outside plant comprises tiers of cabling between distribution points in the exchange area, so that a single pair of copper wire, or an optical fiber, reaches each subscriber location, such as a home or office, at the network interface.
A Panasonic answering machine with a dual compact cassette tape drive to record and replay messages. An answering machine, answerphone, or message machine, also known as telephone messaging machine (or TAM) in the UK and some Commonwealth countries, ansaphone or ansafone (from a trade name), or telephone answering device (TAD), is used for answering telephone calls and recording callers' messages.