entry by entering [ 2 ] [ Hold ] [ 2 ] into your list (using the wild card for the middle digit).

The examples below show how you would enter telephone numbers for a Disallowed List, including both normally-dialed numbers and numbers with wildcards.

■Specific Telephone Numbers. Dial the telephone number directly. For example, to prevent calls to the local number 555-5678, press [ 5 ] [ 5 ] [ 5 ] [ 5 ] [ 6 ] [ 7 ] [ 8 ] .

■All Telephone Numbers in One Area Code. The following list entries prevent calls to the 900 area code:

■List 1 (Toll Call Prefix required)

1900

Prevents direct-dial calls to area code 900

0900

Prevents operator-assisted calls to area code 900

■List 2 (Toll Call Prefix not required)

900Prevents all calls to area code 900.

NOTE:

The entries you must make to restrict toll calls differ depending on the setting for the Toll Call Prefix (#402) procedure. (This setting tells the equipment controller whether a “0” or “1” is required when you make toll calls.) Make sure the Toll Call Prefix is set correctly for your dialing area. If it is not, entries on the Disallowed and Allowed Lists may not be handled properly.

■All Telephone Numbers in One Exchange. The following list entries prevent calls to the 976 exchange:

■ List 1 (Toll Call Prefix required)

976

Prevents local calls

1!0!976

Prevents direct-dial calls to area codes with “0” as the

1!1!976

second digit

Prevents direct-dial calls to area codes with “1” as the

0!0!976

second digit

Prevents operator-assisted calls to area codes with “0”

 

as the second digit

0!1!976

Prevents operator-assisted calls to area codes with” 1”

 

as the second digit

1976

Prevents direct-dial in-state calls (needed only when 0

 

or 1 is required for in-state toll calls)

0976

Prevents operator-assisted in-state calls (needed only

 

when 0 or 1 is required for in-state toll calls)

■List 2 (Toll Call Prefix not required)

976 Prevents local calls

!0!976 Prevents calls to area codes with “0” as the second digit, such as 203

!1!976 Prevents calls to area codes with “1” as the second digit, such as 212

Customizing Your System 4-19

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AT&T II manual Prevents direct-dial calls to area code, Prevents all calls to area code, Prevents local calls, Second digit
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II specifications

AT&T II, a pivotal case in the landscape of telecommunications regulation, emerged from the expansive antitrust actions against the American Telephone and Telegraph Company (AT&T). Following World War II, AT&T had established itself as a telecommunications behemoth, monopolizing the market. The ramifications of this dominance spurred a significant shift in regulatory measures, leading to the dissolution of the Bell System in 1984, which consisted of AT&T and its regional operating companies.

One key feature of AT&T II is its emphasis on promoting competition in the telecommunications sector. The court's decision aimed to dismantle the monopolistic practices that had stifled innovation and restricted consumer choice. By encouraging competition among various service providers, the ruling paved the way for an environment where new technologies could flourish.

The technologies that emerged post-AT&T II significantly transformed the telecommunications landscape. The introduction of new digital switching systems allowed for improved call quality and increased network efficiency. The evolution of fiber-optic technology also played a crucial role, enabling faster transmission speeds and greater data capacity. Moreover, innovative services, such as mobile telephony and broadband internet, proliferated as competition increased.

Another characteristic of AT&T II is its focus on accessibility and consumer protection. The ruling mandated that telecommunications services be available to a broader swath of the population, ensuring that underserved communities had access to essential communication services. This shift not only democratized access but also laid the groundwork for the modern internet revolution, fostering the growth of the digital economy.

The impact of AT&T II can also be seen in the regulatory frameworks that followed. The Federal Communications Commission (FCC) adopted policies aimed at enhancing market transparency and ensuring fair practices among competitors. These regulatory changes helped to create a more equitable playing field, allowing smaller companies to compete against established giants.

In summary, AT&T II marked a turning point in telecommunications history, characterized by a focus on competition, technological advancements, and consumer protection. The dissolution of AT&T's monopoly allowed for the rapid evolution of technology and services, ultimately benefiting consumers and fostering an environment ripe for innovation. This ruling not only redefined the telecommunications industry but also set a precedent for how markets are regulated in the United States.
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