- Industry: Telecommunications
- Number of terms: 29235
- Number of blossaries: 0
- Company Profile:
ATIS is the leading technical planning and standards development organization committed to the rapid development of global, market-driven standards for the information, entertainment and communications industry.
In telephony, a change, as a function of temperature, in the shape of the frequency-vs. -attenuation response curve, i.e., characteristic, of a transmission line.
Industry:Telecommunications
In telephony, a circuit in which manually generated signaling power is used to perform ringdown.
Industry:Telecommunications
In telephony, a circuit that automatically releases a connection from a console or switchboard, once the connection has been made to the appropriate terminal. Note: Loop buttons or jacks are used to answer incoming listed directory number calls, dial "0" internal calls, transfer requests, and intercepted calls. The attendant can handle only one call at a time. Synonym released loop.
Industry:Telecommunications
In telephony, a circuit that automatically releases a connection from a console or switchboard, once the connection has been made to the appropriate terminal. Note: Loop buttons or jacks are used to answer incoming listed directory number calls, dial "0" internal calls, transfer requests, and intercepted calls. The attendant can handle only one call at a time. Synonym released loop.
Industry:Telecommunications
In telephony, a generic term for all wireless phones, regardless of the technology they use; the term derives from cellular base stations that receive and transmit calls. Both cellular and PCS phones use cellular technology. Note: The strategically placed rf base stations have limited, usually overlapping coverage areas (cells) that serve to connect mobile, usually small handheld radio tranceivers (cellular mobile telephones (called "cell phones") to the public switched telephone network. When necessary, based on the rf signal strength from a given moving cell phone, calls in progress may be automatically switched via landlines from one cell to another, to maintain the connection.
Industry:Telecommunications
In telephony, a low-level artificial noise introduced into the receiver to indicate that the connection is still in effect, even though no voice sound is being transmitted (no one is speaking) or no voice sound is audible.
Industry:Telecommunications
In telephony, a method of signaling an operator in which telephone ringing current is sent over the line to operate a lamp and cause the drop of a self-locking relay. Note 1: Ringdown (a) is used in manual operation, as distinguished from dialing, (b) uses a continuous or pulsed ac signal transmitted over the line, and (c) may be used with or without a switchboard. Note 2: The term "ringdown" originated in magneto telephone signaling in which cranking the magneto in a telephone set would not only "ring" its bell but also cause a lever to fall "down" at the central office switchboard.
Industry:Telecommunications
In telephony, a method whereby the signaling circuit E & M leads use the same cable pair (s) as the voice circuit and no filter is required to separate the control signals from the voice transmission.
Industry:Telecommunications
In telephony, a service feature that provides an indication to a terminal already engaged in an established call that one or more calls are awaiting connection.
Industry:Telecommunications
In telephony, a signal of specific duration and character that indicates to a user (customer, subscriber) that a calling party is engaged in an access attempt. 2. Synonym ring network. See network topology.
Industry:Telecommunications
