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A vertical service code (VSC) is a sequence of digits and the signals star (*) and pound/hash (#) dialed on a telephone keypad or rotary dial to access certain telephone service features. [1] Some vertical service codes require dialing of a telephone number after the code sequence.
The more limited three-way calling is available (usually at an extra charge) on home or office phone lines. For a three-way call, the first called party is dialed. Then the hook flash button (or recall button) is pressed and the other called party's phone number is dialed. While it is ringing, flash/recall is pressed again to connect the three ...
Manual service is telephone service in which a human telephone operator routes calls as instructed by a subscriber with a telephone set that does not have a dial. Dial service is when an exchange routes calls by interpreting subscriber-dialed digits. A telephone switch is the switching equipment of an exchange.
AT&T and Verizon previously stated they want to be fully operational on newer infrastructure within the next few years. ... and 1 virtual public forum in the next few weeks for AT&T customers to ...
Local toll calls are each billed at + (), where is minimum charge for a local toll call, is the per-minute charge, and is the duration of the call in minutes. Local toll calls are traditionally grouped into two price ranges, called "near zone" and "far zone", with values of m {\displaystyle m} and p {\displaystyle p} higher for far zone.
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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.
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