In telephony, the application of a signal to a line (a) to operate a line signal lamp or a supervisory signal lamp at a switchboard or (b) to ring a called receiver instrument.

A number determined in accordance with the Code of Federal Regulations, Title 47, part 68, which number represents the ringer loading effect on a line.
Note: A ringer equivalency number of 1 represents the loading effect of a single traditional telephone set ringing circuit. Modern telephone instruments may have a REN lower than
1. The total REN expresses the total… (Read More →)

Oscillations that occur in the output of systems after a sudden change in the input. [T1.646-1995]

In traditional telephony, a nominal period (usually approximately 6 seconds) composed of alternate (a) ringing signals (ringing current) and (b) a silent interval.

1. The alternating current (ac) component of the alerting signal. [T1.401-1988] [T1.407-1990]
2. An ac signal applied across the network interface (NI) of such magnitude, frequency, and duration to cause an electromechanical ringer to ring. Used to alert the customer installation (CI) of an incoming call. [T1.401-1998]

Slang. To encode, compress, transfer, and copy digitized audio or video data from a compact disc (CD) to a computer hard drive.
Note: Ripping is usually done with the intent of transferring those files to another user or another device.

Of an optical cable, a parallel cord of strong yarn that is situated under the jacket(s) of the cable for the purpose of facilitating jacket removal preparatory to splicing or breaking out.
Note: The rip cord is exposed by carefully removing or severing a portion of the jacket near the end of the cable. It is then grasped with the… (Read More →)

1. In a dc voltage, the alternating component that is residually retained from rectification of ac power, or from generation and commutation.
2. In a dc voltage, the alternating component that is coupled into a circuit from a source of interference.

Acronym for reduced instruction set chip, reduced instruction set computing.
Note: Pronounced "risk. "

In the approximation of a step function, the time required for a signal to change from a specified low value to a specified high value. Typically, these values are 10% and 90% of the step height.