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  2. Fixed Dialing Number - Wikipedia

    en.wikipedia.org/wiki/Fixed_dialing_number

    Numbers are added to the FDN list, and when activated, FDN restricts outgoing calls to only those numbers listed, or to numbers with certain prefixes. [1] A notable exception is that emergency calls to 000, 112, 911, 999 and the like are exempt. [2] Incoming calls are not blocked by FDN. [1]

  3. Trap and trace device - Wikipedia

    en.wikipedia.org/wiki/Trap_and_trace_device

    Title 18 of the United States Code defines a trap and trace device as follows: . The term "trap and trace device" means a device or process which captures the incoming electronic or other impulses which identify the originating number or other dialing, routing, addressing, and signaling information reasonably likely to identify the source of a wire or electronic communication, provided ...

  4. GSM services - Wikipedia

    en.wikipedia.org/wiki/GSM_services

    Mobile subscribers pay for the connection time (typically using in-plan or prepaid minutes) for both incoming and outgoing calls. For outgoing calls, any long distance charges are billed as if they originate at the GMSC, even though it is the visiting MSC that completes the connection to the PSTN. Plans that include nationwide long distance and ...

  5. Ground start - Wikipedia

    en.wikipedia.org/wiki/Ground_start

    The central office sends dial tone and the rest of the call proceeds normally. In ground-start signaling, the central office initiates a call by grounding tip and putting the ringing signal on the line. To avoid glare, before the PBX originates an outgoing call, it must first verify that the CO has not already applied ground to tip.

  6. Telephone call - Wikipedia

    en.wikipedia.org/wiki/Telephone_call

    A telephone call or telephone conversation (or telcon [1] [a]), also known as a phone call or voice call (or simply a call), is a connection over a telephone network between the called party and the calling party. Telephone calls started in the late 19th century, initially relying on analog systems.

  7. Statewide outage impacting 911 calls, phone and ... - AOL

    www.aol.com/911-calls-not-working-landlines...

    The company told WHO-13: “Our techs are working hard to fix a service disruption, caused by a water pipe break, which is affecting landline 911, phone, and Internet service for some customers in ...

  8. Telephone - Wikipedia

    en.wikipedia.org/wiki/Telephone

    Most telephones also contain an alerting feature, such as a ringer or a visual indicator, to announce an incoming telephone call. Telephone calls are initiated most commonly with a keypad or dial, affixed to the telephone, to enter a telephone number , which is the address of the call recipient's telephone in the telecommunications system, but ...

  9. Call processing - Wikipedia

    en.wikipedia.org/wiki/Call_processing

    The sequence of operations performed by a switching system from the acceptance of an incoming call through the final disposition of the call. [1] See call control for a more complete description. The series of steps and processes by which an organization automates the handling of telephone calls (usually incoming calls).