Telephone Buttons and Indicators

Display

[MLS-18D and MLS-12D only]

When making a call, shows the number dialed and duration of call. When receiving an intercom call, shows the number of the extension calling. When not using the phone, displays today’s date and time. (You can adjust the display contrast on the MLS-18D–see “Volume Con- trol Buttons” below right.)

Calling Feature Buttons

MLS-18D, MLS-12D, and MLS-12 only]

These four buttons, from left to right are pressed to use the following features: Privacy, Last Number Redial, Recall, and Conference Drop. See p. 5.

Line Buttons

Press to make or answer outside calls. Green and red Iights next to each button show what is happening on the Iine. See “Lights,” p. 4.

Intercom Buttons

Press either button to make or answer an inside (intercom) call to another extension.

Feature Button [Labeled "Feat" on MLC-6]

Press to dial Speed Dial numbers (p. 1.); to store Auto Dial numbers (p. 4); and (on MLS-6 phones only) to access the Last Number Redial Recall, and Conference Drop features (p. 5).

Conf (Conference) Button

Press to add other parties to your call (p. 6).

Transfer Button (Labeled ”Trans” on MLC-6]

Press to transfer an outside call to another extension (p. 6).

Hold Button

Press to put a call on hold (p. 6).

Auto Dial Buttons

MLS-18D, MLS-12D, and MLS-12 only]

Stores outside or intercom Auto Dial numbers for dialing with one touch. See p. 4.

Spkr (Speaker) Button

On MLS-18D, MLS-12D, and MLS-12 phones, press to dial and speak on your phone without lifting the handset. When you press [ Spkr ], both the speaker and the micro- phone come on (indicated by the lights next to the [ Spkr ] and [ Mic ] buttons). When the party on the other end answers, you can speak without lifting the handset. (On the MLS-6, press to did without lifting the handset; when

the party answers, lift the handset to speak.) Speakerphone Hint: For more conveniet speakerphone

operation, leave the microphone on all the time (press

[ Mic ] if the light next to the button is off). When you receive a voice-signaled call (you hear a beep), the person calling can talk to you over your phone’s speaker; simply begin speaking to have a hands-free, two-way conversation.

Mic (Microphone) Button MLS-18D, MLS-12D, and MLS-12 only]

Press [ Mic ] to turn your microphone on and off. When the green light next to the button is on, the microphone is on and the person on the other end of a call can hear you. To answer calls without lifting the handset, leave the micro- phone on (see “Speakerphone Hint” above). On a speak- erphone call, press [ Mic ] to mute your voice.

Message Light

Flashes to show current settings while changing option settings.

Volume Control Buttons

Press to decrease ( ▼ ) or increase ( ▲ ) the volume of the ringer, speaker, and handset.

To adjust ringer volume, while phone is idle and hand- set is on the phone, press ▼ or ▲ .

To adjust speaker volume, press ▼ or ▲ while listen- ing to a call through the speaker.

To adjust handset earpiece volume, press ▼ or ▲ while listening to a call through the handset.

To adjust display contrast on an MLS-18D phone, when the phone is idle and the handset is on the phone; press [ * ] ; then press ▼ to decrease the bright- ness, or ▲ to increase the brightness.

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AT&T manual MLS-18D and MLS-12D only, MLS-18D, MLS-12D, and MLS-12 only, Press to put a call on hold p
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MLS-18D, 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.

One of the main features of the MLS-12 is its strong emphasis on voice clarity and audio quality. The system is integrated with cutting-edge noise reduction technologies that ensure clear communication even in noisy environments. This is particularly important for users operating in the field, where ambient noise can significantly impact radio communications.

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.

In terms of connectivity, the MLS series supports various frequency bands and communication protocols, making it versatile and compatible with multiple networks. This flexibility allows organizations to tailor their communication systems to fit unique operational requirements, further enhancing productivity.

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.
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