Description

11Programmable keys (function keys)

Ten keys for storing frequently used numbers. You can store two numbers per key (first level and second level). See sections “Dial by

afunction key” on page 29 and “Set the number of programmable keys” on page 84.

12Microphone

Used for handsfree conversation.

13Mute

a.Switch microphone on or off. See section “Mute” on page 44.

b.Switch off the ring signal in idle mode or when ringing. See sections “Silent ring” on page 18 and “Mute ring signal” on page 18.

14Loudspeaker on/off

Switch loudspeaker on or off. See section “During Calls” on page 43.

15Headset key

Activate headset. See section “Headset (optional)” on page 91.

16R-key

Used for example to make an inquiry, to transfer a call or to establish a conference, see section “During Calls” on page 43.

Note: Sometimes it is required to change the flash time for the R-key, see section “Flash time (R-key) on page 85.

17Volume control

Adjust the volume. See section “Handset, headset and loudspeaker volume” on page 78.

18Loudspeaker

19Prog On/Off switch

Enable or disable the program key. See section “Enable/Disable function key programming” on page 90.

20Message Waiting switch

Switch Message Waiting indication on or off. Also used to reverse the polarity in case of crossed line cables. See section “Message Waiting indication” on page 90.

Dialog 4187 Plus

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Ericsson 4187 Plus Programmable keys function keys, Microphone, Mute, Loudspeaker on/off, Headset key, Key, Volume control

4187 Plus specifications

The Ericsson 4187 Plus is a state-of-the-art telecommunications receiver designed for optimal performance in challenging environments. This advanced device caters to various applications, primarily in field operations, providing reliable communication capabilities in remote or demanding locations.

One of the standout features of the Ericsson 4187 Plus is its robust design. Built to withstand extreme weather conditions, it operates efficiently in a wide temperature range. This durability ensures that users can rely on the device for prolonged periods in the field without concerns about equipment failure due to environmental factors.

The receiver supports multiple frequency bands, enhancing its versatility for different communication requirements. This feature makes the Ericsson 4187 Plus suitable for a range of applications, including disaster recovery, military operations, and emergency response situations. With its ability to seamlessly switch between different networks, the device ensures consistent connectivity even when moving between coverage areas.

In terms of technology, the Ericsson 4187 Plus incorporates advanced digital signal processing capabilities. These capabilities provide clearer audio quality and reduce background noise, which is crucial in dynamic environments where clear communication is vital. The receiver is also compatible with various communication protocols, allowing it to connect effortlessly with existing telecommunications infrastructure.

Another significant characteristic of the Ericsson 4187 Plus is its user-friendly interface. The device features intuitive controls and a clear display, enabling users to navigate its functionalities with ease. This design consideration is particularly important for field personnel who may need to operate the device under pressure.

Battery life is another critical aspect of the Ericsson 4187 Plus. Designed for extended use, the device boasts a long-lasting battery that can endure lengthy missions without frequent recharging. Additionally, it offers energy-efficient modes that optimize power consumption based on usage patterns.

Overall, the Ericsson 4187 Plus stands out as a leading telecommunications solution, combining durability, advanced technology, and user-friendliness. Its ability to deliver reliable communication in various scenarios makes it an invaluable tool for professionals operating in remote or challenging conditions.