Interphone Knowledge Collection

1. Purchase and maintenance of batteries

Try to buy batteries with high energy, long life, small memory effect and green environmental protection.
1. Working temperature: -20 ° C-60 ° C;
2. Please check whether the radio is off when the battery is replaced, and do not plug or unplug the battery when the radio is on;
3. When the battery needs to be stored for a long time, please precharge the battery with about 50% of the power, which will help prevent the performance of the battery from declining;
4. The first three charges should be as full as possible for 16 hours to reduce the memory function. The charging time will be about 10 hours later;
5. The battery can be used for up to 8 hours under 5-5-90 (ie 5% transmit signal, 5% receive signal, 90% standby), depending on the battery capacity, quality, and frequency of use.
6. The service life of the battery is generally measured by the number of battery "charge-discharge" cycles, but the radio battery standards of different brands of radios are different, such as the minimum cycle number of MOTO batteries is 300.
7. For general nickel-metal hydride batteries and nickel-cadmium batteries. Before each charging, make sure that the battery of the interphone is completely clean (that is, it cannot be normally transmitted when the PTT button of the interphone is pressed). Otherwise, it will cause the walkie-talkie battery to produce memory. The battery life is greatly shortened.

2. Communication distance

The professional phone is flat, open and barrier-free. The longest distance can reach 3-5 kilometers, but due to the influence of obstacles (such as buildings and trees) on the transmission of radio waves, at the same time, some external factors often weaken the signal of the call. The scope will also change. When there is network support, the intercom distance can reach tens of kilometers.

3. Selection of frequency points

One is the 150MHz frequency band, and the other is the 400MHz frequency band. It is recommended to buy products in the 400MHz frequency band. Because the 400MHz walkie-talkie has a relatively high frequency, the antenna can be made relatively short or thin, with a beautiful appearance and convenient use. In addition, the 150MHz frequency band in Beijing suffers from severe interference, which seriously affects the communication distance. Under the same power condition, the actual communication distance of a 400MHz device is better than that of a 150MHz device.

Fourth, the display

Some professional walkie-talkies with LCD display, some do not, this does not absolutely mean that the walkie-talkie with LCD display is relatively high-end. Because the LCD is easily broken and damp, some walkie-talkies designed for use in harsh environments intentionally do not display information through the LCD screen, such as MOTOROLA GP328plus, which should be considered a relatively high-end machine, and also has no LCD screen.

Five, call function

With the support of the network (that is, setting up a relay station), some interphones can realize the function of making calls. However, if it is only a regular call between single machines, the function of making a call cannot be realized.

6. Radiation and antenna

The antenna is 5 to 7 cm away from the body to talk to reduce radiation, and try not to use exposed antennas.
"Comparison of walkie talkie and mobile phone"

Radio intercom equipment occupies an irreplaceable and important position in the global communication system. It is used for liaison and command scheduling among team members, improving work efficiency and rapid response ability to deal with emergencies, and has been well received by users from all walks of life. In today's enduring popularity of new and sharp communication products such as mobile phones, the functions of interphones are still irreplaceable.

The difference between walkie talkie and mobile phone
Walkie talkie mobile phone
Only one-time investment Billing based on talk time
Press a key to talk Need to dial and wait for connection
Call queuing, multi-group call, group call, group call One to one call
Will not drop Dropped
Suitable for work scheduling Suitable for individuals
Suitable for emergency communication and emergency handling Suitable for daily communication

The use of the two-way radio should be noted that every time the power is turned on, the correct channel should be checked to avoid unnecessary errors.
When using the two-way radio, keep the two-way radio vertical and the microphone 3-5 cm away from the mouth.
When using the intercom, avoid high temperature, humidity, combustible gas and other environments away from the gas station.
When using the walkie-talkie, move lightly. Do not use the antenna part of the portable walkie-talkie. This may damage the antenna and affect the call.
The power consumption is large when launching, and the power consumption is small when answering, and it needs to save power when waiting.
When charging, the first charge is better than 8 hours, otherwise it will affect the future charging efficiency and battery life.
Do not switch on and off multiple times during use, and adjust the volume to a position suitable for your hearing.
Only use original or approved antennas from Kelixun. Unauthorized or modified antennas may damage the radio or violate the regulations of the Radio Regulatory Commission of the Information Industry.
The radio can't be unscrewed and used, otherwise it will easily damage its power tube during transmission.
Do not use damaged antennas. During transmission, if the damaged antenna touches the skin, it may cause slight burns.
The battery must use the original or approved battery of Keli Xun, and should be charged in an environment of 5-40 degrees Celsius. If it exceeds this temperature range, the service life of the battery will be affected, and it may also be less than the rated capacity.
To avoid problems caused by electromagnetic interference or electromagnetic compatibility, please turn off the radio when the logo of "turn off the radio" is affixed. Such as hospitals, airports, gas stations and other places.
After the radio is used for a long time, the button control knob and the cabinet are easily dirty. Please remove the control knob from the radio and clean the cabinet with a neutral detergent and a damp cloth. The use of chemicals such as decontamination agents, alcohol, sprays, etc. may cause damage to the surface and housing of the radio.
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USB Connector

A comprehensive selection of USB connectors are available with various combinations of form factors, interface and version types, vertical and horizontal configurations, as well as a unique new USB 2.0 Type-C charging option. Chances are Antenk have the right USB connector for you.

USB (Universal Serial Bus) was originally developed and introduced in 1996 as a way of setting up communication between a computer and peripheral devices by replacing many varieties of serial and parallel ports.
USB connectors have become the standard connection method for devices such as mice, keyboards, game pads & joysticks, scanners, digital cameras, printers and external hard drives.
Although designed for personal computers USB has become commonplace on other devices such as mobile phones, PDA's, video game consoles, AC power adaptors, memory sticks and mobile internet access dongles.

USB Connector Type
USB Type A
Also known as USB standard A connector, the USB A connector is primarily be used on host controllers in computers and hubs. USB-A socket is designed to provide a "downstream" connection intended for host controllers and hubs, rarely implemented as an "upstream" connector on a peripheral device. This is because USB host will supply a 5V DC power on the VBUS pin. As such, it is important to remember while purchasing USB cables it is safest to make sure at least one of the plugs is a USB A.
Though not that common, USB A male to A male cables are used by some implementers to make connections between two USB A style female port. Be aware that typical A-A cables are not intended for connection between two host computers or computer to hub.

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USB 2.0 A to B Angle Cables
USB 2.0 A to Mini B Angle Cables
USB 2.0 A to Micro B Angle Cables
USB 2.0 A to B Locking Cables
USB 2.0 A to Mini B Angle Cables
USB 2.0 A Female to A Cables
USB 2.0 A Female to Crimp Housing Cables
USB 2.0 A to B High Flex Cables
USB 2.0 A to C Cables


USB Type B
Also known as USB standard B connector, the B style connector is designed for USB peripherals, such as printer, upstream port on hub, or other larger peripheral devices. The primary reason for the development of USB B connectors were to allow the connection of peripheral devices without running the risk of connecting two host computers to one another. USB B type connector is still used today, though it is slowly being phased out in favor of more refined usb connector types.

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USB 2.0 A to B Cables
USB 2.0 A to B Angle Cables
USB 2.0 A to B Locking Cables
USB 2.0 A to Mini B Angle Cables
USB 2.0 B Female to B
USB 2.0 B Female to 5 Pin Cables

USB Type C
USB-C or USB Type-C connector is the newest USB interface came to the market along with the new USB 3.1 standard. Different from previously mentioned USB A type and B type connector, USB C Type connector can be used on both host controller ports and devices which use upstream sockets. In the last few years a numbers of laptops and cellphones have appeared on the market with C style USB connectors.
USB Type C connector is compatible with USB 2.0, 3.0, 3.1 Gen 1 and Gen 2 signals. A full feature USB 3.1 Gen 2 C to C cable is able to transmit data at maximum 10 Gbps with enhanced power delivery of up to 20V, 5A (100W) and to support DisplayPort and HDMI alternate mode to transfer video and audio signal.

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USB-C to USB-C Cables
USB 3.0 to USB-C Cables

USB Mini B
Similar to USB B type connector, USB mini B sockets are used on USB peripheral devices, but in a smaller form factor. The mini B plug by default has 5 pins, including an extra ID pin to support USB On-The-Go (OTG), which allows mobile devices and other peripherals to act as a USB host.

Initially, this plug was designed for earlier models of smartphones, but as smartphones have become more compact and with sleeker profiles, the Mini USB plug has been replaced by the micro USB. Now, the Mini-B is designed for some digital cameras while the rest of the mini plugs series have become more of a legacy connectors as they are no longer certified for new products.

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USB 2.0 A to Mini B Cables
USB 2.0 Mini A to Mini B Cables
USB 2.0 Mini B to Mini B Cables
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USB 2.0 Mini A to Mini B Angle Cables
USB 2.0 A to Mini B Locking Cables
USB 2.0 A to Mini B High Flex Cables
USB 2.0 Mini B to Mini B High Flex Cables

USB Micro B
The micro USB B connector essentially a scaled down form of the mini USB which allowed mobile devices to get slimmer while still maintaining the ability to connect to computers and other hubs.


USB A-Type Connector, USB B-Type Connector, USB Type-C Connector, Micro-USB A Connector, Micro USB B Connector, USB Mini-b (5-pin) Connector, USB Mini-b (4-pin) Connector, USB 3.0 A-Type Connector, USB 3.0 B-Type Connector, USB 3.0 Micro B Connector

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