JVCKENWOOD Corporation (http://www.jvckenwood.co.jp/en/) announces that the NXDN Common Air Interface (CAI) was accepted at the Study Group 5 (SG5) meeting of the International Telecommunications Union Radiocommunications Sector (ITU-R) held in November 2016 and in Report M.2014-3, published in February 2017. This inclusion is highly significant since it represents official recognition – by the organization in charge of international standards – of NXDN as an international digital land mobile system, paving the way for its even wider adoption on a global scale.
NXDN is an open standard narrowband digital protocol employing 6.25 kHz and 12.5 kHz FDMA technology to comply with frequency coordination requirements in many countries; it supports a comprehensive radio system including trunked, non-trunked and direct mobile-to-mobile communication. NXDN was developed by JVCKENWOOD in cooperation with Icom Incorporated to offer an alternative for the Land Mobile Radio (LMR) industry that would facilitate development of more affordable digital radio products that would satisfy the FCC narrowbanding mandate. It is also intended to help countries that lack sufficient frequency resources for their public safety agencies and business operators.
This future-proof protocol offers numerous advantages. For example, 6.25 kHz dual-channel systems can be configured to fit within a 12.5 kHz channel, effectively doubling spectrum efficiency compared to an analog FM system occupying the same channel. Two NXDN channels can be allocated as voice/voice, voice/data, or data/data. Compared to analog FM, it provides wider coverage and superior multipath characteristics, but at the same time NXDN systems support mixed digital/analog operation, thus facilitating smooth migration to a narrowband digital system. With these and other advantages such as clear voice quality and strong security, it has proved highly successful and the number of NXDN radio terminals supplied into mission-critical non-mission critical applications has grown rapidly. NXDN has truly become a leading digital protocol for mobile communications.
NXDN is implemented in the KENWOOD-brand NEXEDGE product range, which since 2008 has offered digital conventional and trunked radio solutions to meet the diverse requirements of a wide range of government and industry users. And 2015 saw the debut of Gen2, the second generation of NEXEDGE products, with enhanced features, flexibility and performance – including the capability of linking up to 1,000 sites or 24 networks. NEXEDGE solutions are leveraging the full potential of the NXDN protocol, now officially recognized by the ITU.
JVCKENWOOD Corporation is a global manufacturer specializing in Automotive and Professional System Solutions. It was reborn as one company in October 2011 through the merger of Victor Company of Japan, Limited (JVC) and Kenwood Corporation (Kenwood) three years after management integration.
JVCKENWOOD operates four business segments, Car Electronics, Professional Systems, Optical & Audio, and Entertainment Software with image, sound, and radio technologies, as well as infotainment and visual software. JVCKENWOOD creates excitement and peace of mind, while aiming to achieve profitable growth and become a business group that is widely trusted by society.
Good Day to all,
I want to make something clear that has come to my attention. When there are new users coming on board and the UID Or Talk Proceed Tone, or wrong group SELCALL PTT is used, please, don’t condemn these folks.
They are new members just like we all were at one time or another to NXDN. Promote this network like it is the best thing you have going. You use it, locally or on 65000, promote this network for more users and owners. 52 sites listed and only 39 on the network,
this is not a COUNTRY CLUB exclusive network folks. We promote the use and experiments of NXDN because it’s becoming the normal mode easily to acquire for some people. Just like DMR, but we hold ourselves a little higher than that side of
Digital. Digital is here and will be here for the long haul. Let’s not get in a twit over a Talk Proceed Tone, or dupe ID’s or wrong talk group setting in the PTT SELCALL. Help them out professionally. Because that is what we do.
I am super busy with commercial work I am about ready to explode. Your help to this makes things go better, and get stronger. I am still working with an independent group to create a software bridge between the Icoms and Kenwoods so we can patch 65000 back together. Right now asking for free help is very light, and this group I have approached is tied up with high level Stuff that makes their paychecks. Hang in there, it is in the works.
Let’s keep this rolling strong, 2 new repeater owners have joined the network, Ohio and another Canada station returned.
Thanks all. Seriously.
PS, look for the network to get a boost from hamradio2.0 as the editor has purchased a radio and will be doing some highlights on NXDN and Ham Radio. So yes, other people may not be talking, but they ARE LISTENING!
Evans Mitchell KD4EFM
Greetings and welcome to the NXDN Ham Radio Blog. Wanted to update a few thing and share a link.
We are working on designing a software “bridge” between the Kenwood’s and Icom’s. We now have several “core servers” around the U.S. with 2 of them here in Florida. If you’re interested in joining the NXDN network, please let me know and I will get you the information you need. We welcome any BRAND of NXDN manufacturers and encourage you to join the network, EVEN YOU WEST COAST PEOPLE OVER YAWNDER and ya’ll friends to the north of the border.
NXDN repeater search engine, well, thanks to repeater book, they now have a good listing of these around now. Here is the link to hit it up. (82 KNOWN NXDN systems out there)
I have been rather busy on the commercial side of Kenwood Type C trunking, putting up a few sites here and there, and working on getting our 36th site prep’ed and ready to go.
Hope you all have had a safe and great summer, fall is round’ the bend now. Know of any other NXDN’ers out there, spread the word. There is NO conFUSION that we run a great network here, and we keep things simple. We just let the one’s and zero’s flow!
Here is a quick run up of what is in the pressure cooker….
NXREF UPDATES TO ROLL OUT IN THE COMING MONTHS.
A & B; A Bug Fix for the Kenwood side of the NXREF. One is with the turn on / turn off messages, and the other is dealing with the heartbeat for the UDP ports, since KWD uses 2 UDP ports.
New Features: Talk Group Linking and Authentication, a simple Public PKM style (something like IRLP) to add security to the NXDN Network. If the access code does not match, no link will be established.
Talk Group Linking; this will allow for Local, Regional, State, or even Area Wide uses.
Florida uses TG 1200 for Florida Wide, and Tampa is using 1201 for West Central Florida. As an example.
If you have not become a member of the HAM_NXDN email group, this is a Yahoo group located at: http://groups.yahoo.com/group/ham_nxdn/
This is open to ALL HAMS World Wide, and talks about the use of NXDN Radios for the advancement of Ham Radio, and 6.25 Digital Technology.
That is it for now.
We setup our new NXDN repeater (VHF- R2- 145.650 MHz) to new location over the 17th and 18th weekend of August.
You can find installation photos at:
We linked this repeater to our other NXDN repeater (VHF-R7-145.775 MHz) which is located at our club building via 5Ghz link. Everything seems working now. In next days, we are planning to re-establish NXDN Reflector link via Raspberry PI.
Today I loaded the Kenwood version of the NXREF on a Raspberry Pi in TURKEY – yes, the country Turkey.
If all goes well, on Wednesday, we hope to put Turkey on the WW NXDN net. TA3AS and a club in Turkey have their NXR-710/810 repeater equipped and ready. We’ll be conducting final testing on Wednesday.
- First test of Static IP address to private address for Kenwood
- First NON-VPN connected Kenwood to the WW NXDN net
- First test of a public Kenwood NXDN reflector
- First intercontinental Link up (we’ve already done the first transcontinental and first international version of same).
Stay tuned, Wednesday could be an interesting day for Amateur Radio NXDN!