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ShenZhen Winbrilliant Technology Co Ltd
ShenZhen Winbrilliant Technology Co Ltd  

Gold Index: 109074

You are here: home  > Rugged cell phone  > DPMR push to talk 400-480mhz UHF NFC rug-ged phone 2G RAM New factory 5INCH Phone!! 5inch Original NFC Mobile Phone IP

DPMR push to talk 400-480mhz UHF NFC rug-ged phone 2G RAM New factory 5INCH Phone!! 5inch Original NFC Mobile Phone IP 

Price: 450.0 USD 
Payment Terms: T/T,L/C,WU 
Place of Origin: Guangdong, China (Mainland) 
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Product Detail

Model No.: ws17 s17
Production Capacity: 5000pcs/pc
Delivery Date: 2-5days
Operation System: Others
Display Color: 16000k color
Camera: Front 2MP/back8MP
Brand Name: Winbtech
OS: Android 4.4.2
Screen Resolution: 1280x720 , 5.0" IPS QHD Re...
2G 3g Frequency: gsm 850 900 1800 1900 wcdma...
gps wifi bluetooth: gps wifi bluetooth DPMR wal...
Means of Transport: Ocean,Land,Air
Packing: neutral packing
Technology: WCDMA
Ringtone: MP3
Memory Slot: SD Card
Design: Bar
cpu: MTK 6582 Quad Core
screen size: 5.0 inch hd 1280x720
Dual Sim Dual Standby: Dual Sim (GSM wcdma + gsmWC...
memory: 2GB+16GB
Battery: 3600mAh

DPMR push to talk 400-480mhz UHF NFC rugged phone 2G RAM New factory 5INCH Phone!! 5inch Original NFC Mobile Phone IP68 Waterproof DPMR Walkie tal

Digital Two Way Radio?


DPMR DMR Digital mobile radio

digital private mobile radio


DPMR push to talk 400-480mhz UHF NFC rugged phone 2G RAM New factory  5INCH  Phone!! 5inch Original NFC Mobile Phone  IP68 Waterproof  DPMR Walkie talk.


What is the difference between DMR and dPMR




A little explanation about DMR and dPMR standards may be of interest.

To reduce the congestion present in today's crowded radio spectrum, radio channels must be used more efficiently.

The basic idea is to divide existing radio channels in half, thus doubling the number of channels available.
The term "frequency" which most people are aware of, is actually only a spot centre frequency in the middle of a small band of radio spectrum (a channel).

Before.


After.


Historically, this "dividing" has happened a number of times over the years. As analogue radio technology improved, existing channel widths were cut in half.

Unfortunately, there came a point when it seemed that this technique could no longer be used.

Many were of the opinion that the physical limits of analogue filtering technology had reached a plateau and was not capable of narrower channel widths.
Some manufacturers, however, were of the opinion that a combination of digital and traditional analogue techniques made physical channel division a viable proposition.

So, there have been effectively two technologies researched and developed alongside each other.

The dPMR standard which relies on FDMA (Frequency Division) techniques, which relies on the old analogue way of physically dividing an existing channel.

And the DMR standard relies on TDMA (Time Division) techniques, which relies on creating two 2 "virtual" channels within a single existing channel by transmitting information in "time slots".

Of the two technologies, the dPMR was (theoretically) technically easier to implement, making it the cheaper option.

Even now, the two camps are using various "marketing" press releases and other documents to extol the virtues of their own technology.
Each time advantages / disadvantages are highlighted by one side, advances in technology renders their arguments null and void.

It seems that because both technologies are still in their infancy and are constantly evolving and improving, the argument about which standard is "the best" will not be settled anytime soon.

Want to know more about two way radio?




















A little explanation about DMR and dPMR standards may be of interest.





PMR446

From Wikipedia, the free encyclopediaMotorola TA288 PMR446 licence free radio.

PMR446 (personal mobile radio, 446 MHz) is a part of the UHF radio frequency range that is open without licensing for business and personal use in most countries of the European Union. (It has roughly the same use asFRS or GMRS in the United States and Canada.) Depending on surrounding terrain range can vary from a few hundred metres (in a city) to a few kilometres (flat countryside) to many kilometres from high ground. It is ideal for small-site, same-building and line of sight outdoor activities. PMR446 is used in both professional and consumer-grade walkie-talkies (similar to those used for FRS/GMRS in the United States and Canada).

Historically, analogue FM is used but a digital voice mode has been available in radios conforming to digital private mobile radio (dPMR446) and digital mobile radio (DMR Tier 1) standards designed by ETSI.







The Human Factor – Protect and Strengthen Your LMR System



· Conventional Analog

· Digital Radio

· DMR

· LTE

· Mining

· News

· P25

· Podcasts

· Public Safety

· Services

· Tait

Utilities







Spare Two Way Radios: Are They A Bad Idea?

Are service spares for your two way radio system a bad idea?
After all, spare two way radios would reduce downtime whilst faulty radios are away for repair.

The idea of having spare two way radios to cover faulty downtime sounds appealing, but spare two way radios can also create bigger problems than having no spares at all.

We have clients who have spare radios for their system.
Some have deliberately purchased spare radios, whilst others have acquired spares from reorganisation or staff leaving.

 



· Conventional Analog

· Digital Radio

· DMR

· LTE

· Mining

· News

· P25

· Podcasts

· Public Safety

· Services

· Tait

Utilities




Payment:
a.TT, Western Union,Paypal, MoneyGramfor samples, small qty order or urgent orders at the buyer convenience,

b.TT, paypal, L/C at sight optional and flexible for bulk order.

Shipping
1.For samples, can be sent by express :DHL, UPS, FedEx, TNT, EMS, door to door service
2.For mass order delivery, can be optional with terms of Exwork, FOB, CNF, CIF by air or by sea based on the buyer forwarder or our recommended local forwarder at the buyer convenience
3.To save the buyer shipping cost, we can also offer Chinese cheap cost from our local forwarder for our buyer more selections

About after-sale service:
All of our products much be checked before shipping, 12 months warranty! and we offer replacement or credit for the returned defective products.

Contact us:
Shenzhen Winbrilliant Technology Co.,Ltd
Add:2th Floor,B buliding, ShangXue industral park,,Bantian,LongGang district.Shennanzhong Road, Shenzhen, China 
Tel:+86-0755-83722519
Fax:+86-0755-83722519
Skype: davidesprit



Dear Clients —Please kindly Note :

Import duties,taxes and charges are not included in the item price or shipping charges .These charges are born by the buyer's responsibility.

Please check with your country's customs office to determine what these additional costs will be prior to bidding/buying

Feedback and comments

We will work with you to until you are satisfied. we sincerely hope that you can leave us a positive feedback

If for any reason you are not satisfied with your purchase, please contact us through "My Messages" or "Ask Seller Questions" before leaving neutral or negative feedback. PLEASE DO NOT leaves us 1, 2, 3 -star Detailed Seller Ratings because they are equal to negative feedback.

About us

We are doing all our best to meet our clients needs, your satisfaction is the object we are striving to all the time.

Excellent quality is our sincerest respect paid to our customers. We believe it is the key to win their hearts and the foundation of a long lasting business relationship.


Mr. RobertLEEGAO
skype Mr. RobertLEEGAO
CEO
Tel: 86-755-135107050
Fax: 86-755-135107050
Mobile: 135 1070 5073
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Company Info

ShenZhen Winbrilliant Technology Co Ltd [China (Mainland)]


Business Type:Manufacturer, Trading Company, Distributor/Wholesaler
City: Shenzhen
Province/State: Guangdong
Country/Region: China (Mainland)

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