The entries for toll calls differ, depending on the Toll Call Prefix (#402). Make sure the Toll Call Prefix is set correctly for your dialing area. If it is not, entries on the Disallowed and Allowed Phone Number Lists may not be handled correctly.

Programming Notes: To program telephone numbers, dial the number as you would normally. You can also use the "wildcard” character to stand for any digit in a phone number. For example, if you want to prevent users from making calls to area codes 202 and 212, you could enter each area code separately or com- bine them in one entry using the wildcard to stand for the middle digit. Using the wildcard, you would press [ 2 ] [ Wild ] [ 2 ] . The wildcard character appears as a “!” on the display: 2 ! 2

When you use the wildcard, be sure that you do not inadvertently prevent a call that should be allowed. In the example above, if we do not include a toll prefix (1 or 0), this entry would prevent calls to exchanges 222, 232, 242, 252, 262, 272, 282, and 292 as well as area codes 202 and 212, since the wildcard matches any digit. The examples below include normally-dialed numbers and wildcards.

Specific Telephone Numbers. Dial the telephone number directly, followed by [ Enter ] . For example, to prevent calls to local directory assistance, press [ 4 ] [ 1 ] [ 1] [ Enter ]..

All Telephone Numbers in One Area Code. The following lists use 900 “chat” numbers as an example of preventing calls to an 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)

900 Prevents all ca!ls to area code 900

All Telephone Numbers in One Exchange. The following lists use “976” as an example of preventing all local and long distance calls to an 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 second digit

1!1!976

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

0!0!976

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

0!1!976

second digit

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 tails)

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)

976Prevents 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 the “1” as the second digit, such as 212

International Long Distance. To prevent international calls, enter the inter- national prefix numbers, [ 0 ] [ 1 ] [ 1 ] Enter ].

System Programming 3-21

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AT&T MLS-6TM, MLS-12DTM, MLS-12TM manual Prevents all ca!ls to area code

MLS-12DTM, MLS-12TM, MLS-6TM, MLS-12D specifications

The AT&T MLS-12 and MLS-12D are advanced mobile communication solutions designed to meet the demands of modern businesses and organizations. These systems are known for their robust performance and reliability, making them ideal for various sectors including public safety, transportation, and industrial applications.

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The MLS-12D, on the other hand, enhances the capabilities of the standard MLS-12 by incorporating digital technologies that allow for advanced data services alongside voice communications. This dual functionality is critical in today's fast-paced environment, where instant access to information can streamline workflows and enhance decision-making processes. Users can send and receive text messages, access applications, and share data in real time, all while maintaining high-quality voice communications.

Both models feature an intuitive user interface designed for ease of operation, enabling quick access to essential functions. They are equipped with durable hardware built to withstand harsh conditions, ensuring operational reliability in environments where traditional communication systems may falter.

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Security is a significant concern in any communication system, and the AT&T MLS-12 and MLS-12D address this with advanced encryption technologies that safeguard voice and data transmissions. This feature is crucial for sectors that handle sensitive information, as it helps protect against unauthorized access and data breaches.

In conclusion, the AT&T MLS-12 and MLS-12D stand out as formidable choices for organizations looking to enhance their communication capabilities. With their emphasis on audio quality, advanced data services, user-friendly interfaces, robustness, and security, these devices are well-equipped to meet the evolving demands of modern communication in various industries.