Аналоговые часы POE на базе IP для
- Категория: Другая бытовая электроника >>>
- Поставщик: Shanghai,GlobalTime,Electronic,Co.,Ltd
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Описание и отзывы
Трекер стоимости
| Месяц | Минимальная цена | Макс. стоимость |
|---|---|---|
| Sep-17-2025 | 148.79 $* | 155.68 $* |
| Aug-17-2025 | 146.46 $* | 153.83 $* |
| Jul-17-2025 | 123.38 $* | 129.62 $* |
| Jun-17-2025 | 144.73 $* | 151.48 $* |
| May-17-2025 | 125.32 $* | 131.18 $* |
| Apr-17-2025 | 141.69 $* | 148.97 $* |
| Mar-17-2025 | 140.80 $* | 147.93 $* |
| Feb-17-2025 | 139.92 $* | 146.23 $* |
| Jan-17-2025 | 138.84 $* | 145.16 $* |
Характеристики
Synchronised Time Systems
IP Wall Clock, NTP Clock, Power over Ethernet, Analog PoE Clock
The clock can synchronize with internet public NTP server or private NTP server, so it's not necessary to buy GPS time server (private NTP server), which is usually used in banks, military bases, public secury bureaus, data centers...
However private NTP server is more reliable then internet public NTP server.
Clock Features
• Time is automatically set by Simple Network Time Protocol(SNTP)- no master clock or serial connection required
• Uses PoE ( Power over Ethernet) for easy installation and operation
• Static IP or DHCP addressing
• Automatic Daylight Saving Time change (if applicable)- No master clock required
• Uses PoE ( Power over Ethernet) for easy installation and operation
• Static IP or DHCP addressing
• Automatic Daylight Saving Time change (if applicable)- No master clock required
Power Supply and Installation
Power Supply
(1) If the local network supports PoE, then only one network cable is needed.
(2) If not, then an additional power adapter with a 5.5mm x 2.1mm connector is necessary.
If you need to buy power adapter, please specify when you place order.
Installation
We will send you the installation accessory for hanging the clock on the wall
Management Software
We can program the bell to ring at 30 different moments
The Power over Ethernet (PoE) Advantages
Power over Ethernet or PoE describes any several standard or ad-hoc systems which pass electric power along with data on twisted pair Ethernet cabling. This allows a single cable to provide both data connection and electric power to devices such as NTP clocks, wireless access points, IP cameras, and VoIP phones.
There are several common techniques for transmitting power over Ethernet cabling. Two of them have been standardized by IEEE 802.3 since 2003.
There are several common techniques for transmitting power over Ethernet cabling. Two of them have been standardized by IEEE 802.3 since 2003.
What is NTP
Network Time Protocol (NTP) is a networking protocol for clock synchronization between computer systems over packet-switched, variable-latency data networks. In operation since before 1985, NTP is one of the oldest Internet protocols in current use. NTP is intended to synchronize all participating computers to within a few milliseconds of Coordinated Universal Time(UTC).[1]:3
It uses the intersection algorithm, a modified version of Marzullo's algorithm, to select accurate time servers and is designed to mitigate the effects of variable network latency. NTP can usually maintain time to within tens of milliseconds over the public Internet, and can achieve better than one millisecond accuracy in local area networks under ideal conditions. Asymmetric routes and network congestion can cause errors of 100 ms or more.
It uses the intersection algorithm, a modified version of Marzullo's algorithm, to select accurate time servers and is designed to mitigate the effects of variable network latency. NTP can usually maintain time to within tens of milliseconds over the public Internet, and can achieve better than one millisecond accuracy in local area networks under ideal conditions. Asymmetric routes and network congestion can cause errors of 100 ms or more.
Company Profile
About Us
GlobalTime has been a pioneer in synchronized timekeeping systems since the year 2003. We strive towards innovation and reliability. We feature a complete line of NTP servers (GPS time servers) and synchronized Clocks. With outstanding R& D team, GlobalTime offers a wide range of NTP servers and NTP clocks, radio clocks, CDMA clocks. By providing accurate, real-time information, we keep schools, hospitals, airports, train stations, media houses, offices, financial institutes, military bases, public security bureaus and other governmental institutes informed and on the same stage.
Our clocks are widely used in 68 countries or regions all over the world, including North America, Central America, South America, Europe, Middle East, Africa, Aisa and Australia.
We provide first-rate and lifetime technical support for our products. At GlobalTime, we value our customers and their satisfaction above all else!
Our clocks are widely used in 68 countries or regions all over the world, including North America, Central America, South America, Europe, Middle East, Africa, Aisa and Australia.
We provide first-rate and lifetime technical support for our products. At GlobalTime, we value our customers and their satisfaction above all else!
Office in Shanghai, China
Workshop- NTP Server Testing
Workshop- NTP Clocks Testing
Company Culture (Table Tennise Room)
Exhibitions
ConnecTech Asia in Singapore
GITEX in Dubai, UAE
CES in Las Vegas, USA
FAQ
Question:
Hi from Sweden, I am interest to buy this item, but I don’t know if you can send it to Sweden.
Answer:
Yes, we can send it to Sweden, we have CE certificate. Currently we have sold our NTP clocks and NTP servers to 68 countries or regions over the five continents in the world.
Question:
When there is interruption of power supply, will the clock work?
Answer:
The clock doesn’t have a built-in battery, when there is interruption of power supply, it won’t work. But as soon as the clock is connected to power and network, it will display the correct time automatically, no need of manual adjusting.
Hi from Sweden, I am interest to buy this item, but I don’t know if you can send it to Sweden.
Answer:
Yes, we can send it to Sweden, we have CE certificate. Currently we have sold our NTP clocks and NTP servers to 68 countries or regions over the five continents in the world.
Question:
When there is interruption of power supply, will the clock work?
Answer:
The clock doesn’t have a built-in battery, when there is interruption of power supply, it won’t work. But as soon as the clock is connected to power and network, it will display the correct time automatically, no need of manual adjusting.
Question:
When there is interruption of network, is there any indication? And will the clock still display correct time?
Answer:
When there is interruption of network, is there any indication? And will the clock still display correct time?
Answer:
Normally the clock synchronizes with NTP server every 5 minutes. When there is interruption of network, a small dot will appear on the lower right corner of the LED display and the clock won’t synchronize, so it will be inaccurate slowly, the deviation is about 1 minute per day! When it is connected to network again, it will display correct time and automatically and the dot will disappear.
Question:
Hello! Does this clock support IPv6?
Answer:
No, the current version only supports IPv4.
Question:
Can we set up the time without a NTP server?
Answer:
It does require some NTP server, such as our NTP server (model: GTT100, GTT200, GTT400) or internet based source( internet public NTP server). With that available, it will keep itself accurate and on the money.
Question:
Hello! Does this clock support IPv6?
Answer:
No, the current version only supports IPv4.
Question:
Can we set up the time without a NTP server?
Answer:
It does require some NTP server, such as our NTP server (model: GTT100, GTT200, GTT400) or internet based source( internet public NTP server). With that available, it will keep itself accurate and on the money.
Question:
Will you charge for the management software?
Answer:
No. It is free.
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