In the establishment of a connection or in the call setup, i.e., placement of a call, the time from the initiation of a calling signal to the receipt of a proceed-to-select signal--such as a dial tone--by the call originator.

A unit used to measure communications traffic.
Note 1: A call-second is equivalent to 1 call 1 second long.
Note 2: One user making two 75-second calls is equivalent to two users each making one 75-second call. Each case produces 150 call-seconds of traffic.
Note 3: The CCS, equivalent to 100 call-seconds, is often used.
Note 4: 3600 call-seconds =… (Read More →)

In the establishment of a connection or the placement of a call, the time from the receipt by the call originator of a proceed-to-select signal (dial tone), until all the selection signals have been transmitted (dialing has been completed).

The table of allocation of international call sign series contained in the current edition of the International Telecommunication Union (ITU) Radio Regulations.
Note: In the table of allocation, the first two characters of each call sign (whether two letters or one number and one letter, in that order) identify the nationality of the station. In certain instances where the complete… (Read More →)

Synonym call receiver.

A network-provided service feature in which the network notifies a calling terminal of the address to which the call has been connected.

A sequence of characters transmitted to the calling terminal to permit identification of the called line.

A communication system service feature that enables the system to complete an access attempt in spite of issuance of a user blocking signal.
Note: Systems that provide this feature monitor the busy user until the user blocking signal ends, and then proceed to complete the requested access. This feature permits holding an incoming call until the called party is free.

A network service feature that permits the recipient of an incoming call to determine, even before answering, the number from which the incoming call is being placed.

See caller ID.