YDTech® suppliers of numeric pagers, cordless telephone, paging service, terminal pagers, 1 way pagers,! manufacturers of pagers beepers, BP machines, one way pagers, cordless phones,alphanumeric pagers in china.
BP machines known as beepers, also known as pagers, call machines, is an old-fashioned radio receiving equipment. It receives paging signals from the network side, converts them into numbers, letters or characters, and displays them to the user through the display screen. As a pure signal receiving device, the pager does not transmit signals and has the advantage of being difficult to be located.
for the safety of communication devices, all of the pagers hardware, software, firmware, mechanical aspects parts made in china. send from china. we supply engineering samples for customers testing and approval. thereafter we will manufacture the product and supply to our customers.
1-way pagers are the simplest, easiest to use and most economical pagers. They only receive messages and cannot transmit messages so they are the pagers used most in government buildings and areas where security is a top priority. It is important to understand. a 1-way pager cannot reply back to a numeric page or alphanumeric message, It can only receive the page.
no matter what the reason, this undoubtedly reveals the omission in the process of network equipment security. In this context, the Internet of Things private network, as an application system that provides high reliability and high security, can ensure that the needs of security protection are fully considered in network services, and can effectively prevent security risks such as data leakage and hacker attacks. In the safety monitoring of the docking equipment, the goal of optimizing the supply chain is completed to ensure its safety.
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the message usually included the phone number the user was required to call back to, and sometimes shorter messages as well. The user had to access a payphone or landline to return the message. The limitations were clear - the device did not allow two-way calls, but it was enough to transmit urgent messages with relative immediacy for the time.
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| Frequency Range | 138-174, 278-284, 405-480, 928-932MHz Bands | ||||||||
| Channel Spacing | 25KHz | ||||||||
| Signal Format | Pocsag | ||||||||
| Data Transmission Rate | 1600bps or 3200bps or 6400bps | ||||||||
| Modulation System | Carrier frequency shift keying (NRZ) | ||||||||
| Frequency Deviation | +/-4.5KHZ | ||||||||
| Receiving Sensitivity | 512bps 5uV/m, 1200bps 7uV/m, 2400bps 10uV/m | ||||||||
| Selectivity | 50dB (138-174 MHz), 50dB (278-284 MHz), 50dB (405-480 MHz), 40dB (928-932MHz) | ||||||||
| Spurious Rejection | More than 50dB | ||||||||
| Image Rejection | More than 50dB (138-480 MHz), more than 35dB (928-932MHz) | ||||||||
| Frequency Stability | +/-10ppm (138-174 MHz),±5PPM (405-480 MHz), ±3PPM (928-932MHz) | ||||||||
| Tone Alert Output | More than 75dB(SPL) 10cm, frequency 2731HZ | ||||||||
| Operating Voltage | 0.9V (min) | ||||||||
| Operating temperature. Humidity | -10 ℃ to 40 ℃, 95% (at ℃ 40) | ||||||||
| Storing temperature. Humidity | -10 ℃ to 70 ℃, 95% (at 40 ℃) | ||||||||
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walkie-talkies offer the advantage of instant communication. Unlike mobile phones, which require dialing and waiting for the other party to answer, walkie-talkies enable real-time conversations. With just a push of a button, you can instantly transmit your message to others in your group. Walkie-talkies are user-friendly devices that require minimal setup and technical knowledge. Operating a walkie-talkie is as easy as tuning into the same frequency and pressing the talk button. This simplicity makes them accessible to everyone, regardless of age or technological expertise.
| message capacity | 20 messages, 24 characters | ||||||||
| message full indication | available | ||||||||
| address code | 4 addresses | ||||||||
| display format | 1 line of 12 characters (9 segment ) | ||||||||
| time date | real time with date in 12/24 hours | ||||||||
| in range indication | if pager is within range of reception, " " will not be displayed | ||||||||
| power consumption | standby 0.3mA, receiving 6mA | ||||||||
| low voltage alert | display will show " " indicating low voltage | ||||||||
| backlight | EL | ||||||||
| message received time | time is memorized and will be displayed together | ||||||||
| message protection | 15 messages | ||||||||
| message deletion | individual and all | ||||||||
| melody alert | 12 musical tones | ||||||||
| tone alert | 5 different tone alerts | ||||||||
| tone alert time | more than 8 secs. | ||||||||
| vibration alert | build in vibrator will be activated automatically to indicate receptions of calls | ||||||||
| alarm | built in alarm function at preset time | ||||||||
| sequential lockout | optional | ||||||||
| do not disturb | pager received message without notification | ||||||||
| password protection | hand programming | ||||||||
| battery | AAA (1.5V) | ||||||||
| battery life | 950 hours | ||||||||
| battery back up | 15 seconds | ||||||||
| weight | 50g | ||||||||
| size | L62.2mm X W42mm X H29.2mm | ||||||||
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in remote regions, it’s common to encounter spotty cell phone coverage, making it challenging to communicate with others. However, walkie-talkies overcome this obstacle by operating on specific radio frequencies, ensuring a consistent and uninterrupted communication channel. These devices offer several advantages over mobile phones, making walkie-talkies particularly valuable in areas with weak or no cell phone signals, such as remote or mountainous regions.
frequency is another crucial consideration. Walkie-talkies operate on different frequency bands, and selecting the right one is essential to avoid interference from other users. The most common frequencies are family radio service (FRS) and general mobile radio service (GMRS). FRS operates on a lower power and is suitable for short-range communication, while GMRS offers a higher power and wider coverage area.
one of the key benefits of walkie-talkies is their independence from cell phone towers. Unlike mobile phones, which rely on these towers to establish a connection, walkie-talkies use radio waves to transmit and receive messages. This makes them highly reliable even in areas with limited or no cell phone coverage. another great benefit of walkie-talkies is their impressive range. depending on the model, these devices can cover distances of several miles, making them ideal for keeping in touch with fellow travelers who may be farther down the road or exploring nearby attractions.
the range of a walkie-talkie refers to the maximum distance over which it can transmit and receive signals. by choosing a walkie-talkie with a longer range, you can ensure that your communication remains reliable and uninterrupted, even in the most remote locations. When choosing a walkie-talkie, remember to consider the frequency it operates on and whether it offers multiple channels. By doing so, you can ensure compatibility with other devices and enjoy the benefits of flexible communication options.
frequency is a key factor to take into account when selecting a walkie-talkie. These devices operate on specific frequencies, and it is important to choose a model that is compatible with other devices you may be using. You don’t want to end up with walkie-talkies that cannot communicate with each other due to incompatible frequencies.
in addition to compatibility, our walkie-talkie models offer the convenience of multiple channels. These channels allow for communication on different frequencies, which can be highly beneficial in various scenarios. having the ability to switch between frequencies and use multiple channels makes walkie-talkies versatile and adaptable to various situations.