Hello our beloved readers!
The review will again be devoted to a micro DECT headset, this is a model Snom A150. The headset will give the user even more freedom compared to the model from the previous review, since the connection with this headset is not made through the base station. But first things first.
DECT standard
we talked about the DECT standard in general, about its advantages and disadvantages. Let's now see what leads to these very benefits.
The last time we have attributed to the merits:
Large coverage radius.
This parameter, in turn, is influenced by 2 characteristics. This is the frequency range, since the attenuation of the electromagnetic signal in the atmosphere and the passage or rounding of obstacles depend on the frequencies. DECT technology uses frequencies 1880-1900 MHz, which are in the high frequency range. Radio waves of this range do not go around obstacles, but have good penetrating ability, which is important when the signal propagates indoors.
Also, the power of the signal transmitter affects the range of wave propagation. In the case of DECT in our country, this parameter is limited by law at a level of 10 mW, but even this is enough to propagate the signal in rooms at a distance of up to 50 m. Different materials of walls and floors affect signal attenuation in different ways, below is a brief summary of the impact materials for radio waves of the DECT standard, in the format "Overlapping material" - "Signal power reduction".
- Glass - 10%
- Plastered wall - from 27 to 41%
- Brick - from 44 to 60%
- Aerated concrete - 78%
- Reinforced glass - 84%
- Reinforced concrete - from 75 to 87%
Number of channels.
The second important parameter is the number of channels, which affects the number of simultaneously operating devices. The signal in DECT is transmitted over 10 frequency channels. It would seem a little, but in addition to this, the DECT standard uses time division channel technology. It implies the division of each of the frequency channels into 24 time intervals. For each call, 2 time slots are occupied, one of them is used to transfer outgoing traffic from the device, the second is used to transfer incoming traffic. In total, three technologies are used to create channels:
- FDMA - Frequency division multiple access (multiple access with frequency division)
- TDMA - Time division multiple access (time division multiple access)
- TDD - Time division duplex (time division duplex channel)
That provides a total of up to 120 data channels.
Unpacking and packaging
But back to the main subject of our review, the A150 headset.
The headset comes with a DECT dongle A230, which allows you not to be tied to the base station and easily switch the headset with your devices. In addition, of course, the headset itself, as well as its charging stand.
A150 has a single form factor, unlike the older model, but a lot of inserts that provide convenience for the convenience of the operation process for any user. In addition to the banal convenience, the earbuds affect passive noise reduction, which is important when using the headset in a place where there are a large number of people.
However, the shape of the rim and the volume of the speaker allow you to simply βhangβ the headset on your ear, already providing good audibility with an average level of external noise. The headset is very light, its weight is only 23g.
Design
The design of the headset is laconic, classic black color, the indicator is built into the main key, which is used to receive and end a call, visible metal structural elements that fit very well into the overall image. Each element here not only plays on the appearance, but is also functional, whether it is a metal base rod, which, together with a movable microphone boom, allows you to place a headset on the right or left side of the head, or a metallized insert on the outside of the microphone, around the noise reduction system hole.
The charging stand looks like the base station of the model A170while being noticeably smaller. Because in the case of A150 the stand does not affect the signal transmission process in any way, you can place it in any place convenient for you, only occasionally returning the headset to it for recharging.
At the same time, the appearance of the charging stand will allow it to easily fit into both the workplace environment in the office and the private office at home.
Functionality and operation
Speaking about the operation, I would like to first of all note the process of connecting the headset to the device, whether it be a PC or a phone. Simply insert the DECT dongle into the USB port and wait for the drivers to be installed the first time you connect to a PC. This is where all the action ends! You can already select the headset as the audio playback and reception device on the computer or switch to it using the corresponding key on the IP phone. Moreover, it works not only with Snom IP phones, but also with some third party phones.
Sound Snom A150 not inferior to the sound of the older model. The noise-canceling microphone provides more than good quality and very clear sound, your interlocutors will not notice the difference when switching from using the handset of any of our devices to the headset and back. The speaker provides not only clear, but also very loud sound for such dimensions of the device, while the sound stream is directed exclusively to the user's ear, colleagues will not hear your music or your conversations through this device.
The sound volume can be adjusted from the headset itself, the adjustment keys are located on the rim of the headset, as well as the βMuteβ button that turns off the microphone. Together with the control key on the main unit, this allows you to be completely free from third-party devices, controlling the headset during work or leisure using only the keys built into it.
To sum up
As a result, we have a very convenient device with a maximum of possibilities and a minimum of problems during operation. Snom A150 will appeal to an employee of any level and will allow you to be in touch anywhere in the office, or take a break from your usual business by turning on soft classical music in the relaxation area.
Source: habr.com
