Re: ARLA/CLUSTER: Network Radio (Uns radios que não o são, mas que conseguem alcançar redes globais através da Voz sobre IP)

[João Costa > CT1FBF]

Efectivamente assim é Viegas.

No entanto, os "influencers", que é como agora se chamam estes senhores
actualmente, são os primeiros a alertar e bem que isto nada tem haver com o
radioamadorismo, muito embora, por vezes, se levantem duvidas devido ao
numero muito significativo de radioamadores e amantes das radiocomunicações
no geral presentes.

Por mim, o mais absurdo nem é isto, mas sim, o " HamSphere - The virtual
Amateur Radio".
A idade, por vezes, já não nos permite acompanhar "tamanha evolução".

João Costa(CT1FBF)

Antonio Viegas <ct2ixq  gmail.com> escreveu no dia segunda, 4/11/2019 Ã (s)
17:43:

> Boa Tarde
> Caro João , não posso estar mais de acordo! Mas embora este artigo venha
> focar no Zello , podemos lançar um pouco mais a confusão , os modos de
> fonia digital!
> Cordiais
> ACViegas
>
> -----Mensagem original-----
> De: cluster-bounces  radio-amador.net [mailto:
> cluster-bounces  radio-amador.net] Em nome de João Costa > CT1FBF
> Enviada: segunda-feira, 4 de novembro de 2019 13:54
> Para: Cluster-ARLA
> Assunto: ARLA/CLUSTER: Network Radio (Uns radios que não o são, mas que
> conseguem alcançar redes globais através da Voz sobre IP)
>
> (Quando tudo falha, os Network Radio também falham...mas vale a pena
> conhece-los)
>
> What if you could have a network of handheld and mobile radios with
> global coverage? Forget about expensive repeaters and licenses.
> Everything will work via the cellular 3G/4G network.
>
> Either you want 1-to-1 or 1-to-many radio communications, this is for you.
>
> No range restrictions. If you have cellphone coverage, you are connected!
>
> Introduction to Network Radio
> https://youtu.be/je6xdynS7QU
>
> Network Radios - Good Or Bad? Advantages & Disadvantages
> https://youtu.be/HMcF24PTdhI
>
>
>
> Network Radio – Is it real Ham Radio?
>
> Introduction
> Network Radio began gaining some interest as an amateur radio format
> about a year ago. During the past year Network Radio has gained
> popularity with Amateur Radio operator as well as with radio hobbyist
> in general. The most popular aspect of Network Radio has been based
> around Zello using their mobile phone apps for IOS and Android.
> Basically Zello is an VOIP service with a push to talk feature that
> can be used over WiFi or cellular Data. There are two versions
> available the free personal version and a paid commercial version that
> offers a larger feature set that would be of interest to business
> users. Zello allows for the creation of groups. These groups can range
> from just a friends to thousands of members in a group. When a user
> presses the push to talk button on their phone’s screen, the voice
> message will be heard by all users in the group in pretty much real
> time. Zello claims to have a worldwide user base of 120 million users
> at the time of this writing.
>
> How does Zello Work?
>
> Zello running on Network Radio
>
> Since most people use the personal version of Zello, simply download
> the free app that matches your devices operation system. The device
> can be an IOS or Android phone or tablet or a  Windows PC. Once the
> app is installed you must create a free user account and user name
> with Zello. The user name can be anything that is not in use by
> someone else, but you may want to use your amateur call sign for
> amateur radio use. Once you have logged in, you search for public
> groups to communicate with. These groups can cover a wide range of
> interests and topics. You will find that there are groups that cover
> various aspects of the radio hobby. In these groups you can discuss
> you radio interests with other like minded individuals. Once you’re in
> the group, you can chat with other members, send text messages,
> photos, and positional information to group members. Keep in mind that
> what ever you say is heard by all the other group members. Also, Zello
> will store users voice conversations in the group log so members can
> review them later. You can also create your own groups. Zello has put
> a lot of thought into group management. In any group your going to
> have some “bad actors� so Zello has taken that into account and allows
> for member management. These features can be turned on by the group
> owner by the type of group they decide create.
>
> Zello Group Types
> Anyone can talk – These channels are open to the public to listen to
> or talk on. The channel owner may turn on the voting feature that
> allows the users in a group to vote off a user of the channel after a
> certain number of negative votes from members.
>
> Listen Only – Anyone can listen but only moderators can talk. A
> channel owner can also designate other members moderators to help
> manage the channel. In some cases it might be necessary to switch the
> channel to this mode if it is being used for emergency situations.
>
> Zselect – In this mode anyone can listen but can’t talk. To be able to
> talk on these channels you will have approved by a moderator to be
> able to talk on the channel.
>
> Zselect+ – Only approved channel users can talk or listen to the
> channel. These channels are basically private and encrypted. Users
> will need to approved by the channel owner or moderator before they
> can use the channel.
>
> Ok, what does this have to do with Amateur Radio?
> Amateur radio operators have always been really good about adapting
> emerging technologies to expand their communications toolkit. Network
> Radio offers certain advantages over existing Amateur Radio
> communication technologies. Network Radio can offer the following
> advantages over other communications modes.
>
> Advantages of Network Radio
> 1. Not range limited. The Zello system reaches world wide.
> 2. The audio quality is superb. Usually no dropouts ,digital noise ,
> or static unlike VHF, UHF, HF, D-Star, DMR, or C4FM.
> 3. Very reliable compared to traditional amateur radio communications
> technologies since communications are accomplished through the
> cellular data network and the internet. Basically a direct link
> between the radio users.
> 4. No expensive repeater system required for local amateur radio
> communications.
> 5. No complicated hotspots required. All you need is a cellular
> network connection or a WiFi connection for a Network Radio to work.
> 6. Since Network Radio does not require a FCC license, unlicensed
> individuals can be added to the group if the need arises.
> 7. Equipment costs can be very inexpensive when compared to other
> communications methods.
> 8. No external antennas needed.
> 9. Easy to setup and use.
> 10. Non licensed radio hobbyist can be allowed into Amateur Radio
> channels to gain knowledge of Amateur Radio by interacting with
> licensed Amateurs. Hopefully to eventually become a licensed Amateur
> Radio Operator.
> 11. Can be used easily in mobile or outdoor environments since there
> is no need for external antennas.
>
> Disadvantages
> The major disadvantage is that if there is no cell phone coverage or
> internet then the system doesn’t work. This is the reason that Network
> Radio won’t ever replace traditional RF based Amateur Radio.
>
> Amateur Radio Applications
> Amateur Radio operators are beginning to integrate Network Radio into
> their arsenal of their communication tech. Here are some applications
> in use today and some reasons Network Radio is growing very rapidly.
>
> Alternative to modes that require antennas
> With the aging amateur radio population downsizing or moving into HOA
> restricted housing they often cannot always put up a decent outside or
> inside antenna for Amateur Radio modes that require one. Therefore
> feel that they often have to give up their involvement in amateur
> radio. Some have worked around the issue by the use of hotspots that
> connect to D-Star and DMR radio systems over the internet. Network
> Radio offers a simpler setup and less expensive way for them to enjoy
> “rag chewing� with other amateur radio operators around the world.
> Therefore bringing inactive Amateur Radio operators back to the hobby.
>
> Replace or expand local repeater systems.
> With aging and almost abandoned local repeater systems, Network Radios
> offer a good alternative to local repeaters. Also Network Radio can be
> added to an existing repeater system to expand its coverage by
> interfacing a network radio device directly to the repeater. This
> would allow amateur radio operators to access the repeater from
> virtually any where. Of course the interface channel would need to
> moderated to allow only licensed hams to access the VOIP connection to
> the repeater.
>
> Local Event Coverage
> Amateur radio clubs that offer event coverage can quickly set up comms
> using only the Network Radio system rather than repeaters. This would
> allow for greater range and more reliable coverage given that there is
> good cell phone coverage in the area. There is also the benefit of
> being able to add non-licensed individuals such as event coordinators,
> medical personnel,etc to the channel using their smartphones rather
> than stationing an operator with an individual. This also allows
> everyone that is involved in coordinating the event the ability to
> hear what is going on. The group can be easily added to on the fly.
>
> ARES, Skywarn, etc.
> Some ARES groups are already using Network Radio to supplement their
> regular communications methods. Again the advantage is being able to
> link amateur radio operators in the field quickly to public officials
> since they can be added to a Network Channel via their cellphone. The
> disadvantage is that Network Radio is only functional if the area
> affected still has cellular data service. During Hurricane Michael,
> network radio was used to keep the public informed of the storms
> progress and to take emergency calls to forward to channels
> coordinating rescue and relief operations. However, cellular service
> was interrupted in some areas knocking out Network Radios. This was
> example where network radio could be used until cellular service and
> the internet went down in some areas. After that traditional amateur
> radio HF and VHF communications had to be deployed. However that being
> said it would be possible to use a portable VHF to Network Radio
> repeater link to connect to another VHF – Network Radio link that
> still maintained cellular data service. These types of repeaters can
> be setup easily and quickly using a Network Radio HT and a VHF HT with
> a cable like this one SainSonic RPT-2D Two-way Radio Repeater Box for
> Two Transceivers Station DIY.
>
> Smartphone Phone vs Dedicated Network Radio
>
> Mobile Network Radio
>
> Due to the growing popularity of network radio among radio hobbyist,
> dedicated network radios have appeared in the familiar form factor of
> amateur radio Handi Talkies and mobile/ base units. These radios are
> basically based around an unlocked Android phone with a touchscreen.
> At then end of the day, Network Radios are in essence a stripped down
> Android smartphone in a HT or mobile / base form factor. They
> typically contain a small to large touch screen display, dual SIM
> cards, and a SD card slot. Most of these devices are made to work over
> the GSM cellular network (usually no CDMA networks like Verizon)
> carriers such as AT&T, T-Mobile, and others for voice and data. If you
> add a SIM card with voice and text messaging you can use the radio as
> a regular cell phone. However to use Network Radio you really only
> need cellular data. Fortunately Network Radio doesn’t use a lot of
> data so smaller data plans can suffice depending on your use. Having
> the dedicated data SIM in the Network Radio will allow you to use the
> radio anywhere there is cell service. The other good alternative is if
> you have a smartphone that you carry with you all the time that has a
> WiFi Hotspot feature connected to the Network Radio rather than pay
> for a separate service. Using the radio around the house simply
> requires being connected to your home WiFi. Dedicated network radios
> all come with a side mounted PTT button on the HT or a PTT hand mic
> for the mobile/base unit. The HTs are typically constructed out of
> high impact plastic of varying quality and are rated as IP68 water
> resistance. So they can be abused a bit but they are not built as well
> as amateur radios from Yaesu, Icom or Kenwood. The HTs typically
> contain a 4000ish milliamp battery that can power the unit for several
> days when compared to VHF/UHF HTs that usually will only last a few
> hours. The HT’s can be charged via a mini USB port on the radio or a
> drop in charger. The mobile/base units are powered by a 12 volt source
> and do not contain a battery. The HTs also contain a front and rear
> facing camera while the mobile units do not. Both types of radios have
> GPS built in with the mobile units have an external GPS antenna. The
> HT models also sport an attached cellular antenna which allow for
> slightly better cellular reception than most cell phones. The mobile
> base units typically have a built in cellular antenna with the option
> of attaching an external cellular antenna. Depending on the model,
> both types of radio contain additional sensors like an accelerometer
> and gyroscope. Both types of radios contain very loud built in
> speakers with generally good audio which make them easy to hear over
> the background noise in a vehicle or crowded place. Most Network
> Radios allow you to download apps from the Android Play store. If the
> radio doesn’t come with Zello pre installed you can download it for
> free from the Android Playstore. If you intend to use the use the mini
> USB port to access any photos or data from the HT or mobile/base unit
> you will need to activate the developer mode to gain access to the
> internal storage. You can find these instructions easily on the
> internet.
>
>
>
> If you are new to network radio you might want to just download the
> Zello free app for your smart phone and give the service a try before
> investing in a dedicated network radio. However, if you use the
> service a lot you will probably want to buy a dedicated radio. A
> dedicated Network Radio gives you the convenience of true push to talk
> operation rather than pressing and holding the PTT button on your
> smartphones screen. The audio quality on both transmit and receive can
> be much better than your phone. Especially the receive audio which
> will be much louder and higher quality than even the best cell phone.
> The dedicated radio will should be much more durable than your cell
> phone and probably a lot cheaper to replace than your cell phone if it
> gets dropped. The dedicated Network Radios shout stand up to more
> abuse than your cell phone. If you are going mobile then the mobile /
> base unit will be more convenient than your cell phone. Plus most
> amateur radio operators just feel more comfortable with something they
> can clip to their belt or mounted under the dash. By the way the
> mobile units are typically not very heavy or deep so it is easy to
> find a place to mount in a vehicle. Another comforting factor for the
> radio hobbyist is that these radios come with hard buttons that make
> it easier to access certain functions instead of fumbling with a
> cellphones touch screen.
>
> However there is a little downside to the radios. While it is pretty
> easy to set up Zello on these units it can be a bit of a pain when
> working on the small screen in these units which are typically 2.5 to
> 3 inches. Using the keyboard on the touch screen can be a real
> exercise in patience trying to enter information from the tiny on
> screen keyboard. Usually you just set it up once and don’t have to
> deal with it that often, however if you don’t already have one it
> might be worth investing in a Bluetooth keyboard to make typing
> easier. Another trick is to set everything up on your Zello account
> via your smartphone. When you are done setting up the Network Radio
> channels  on your smartphone, log in to the same account the Network
> Radio and all the settings will transfer over you put into your Smart
> Phone. Be sure to exit the Zello app on your smartphone before logging
> in to your Zello app on your Network Radio since you can’t be logged
> into your account under the same user name simultaneously. If you do
> have more than one Network Radio and want to use them at the same time
> you will need to create a separate user name for each one under your
> account. Another possibility for working with the small screen is to
> install either Vysor or Airdroid to remotely access your Network Radio
> via your PC. These apps will give you access to your device on a
> larger screen with access to full keyboard and mouse making some
> setups much easier. These apps require you to have the developer
> option on the Android app and plugged into the host computer via USB
> (except for the paid version Vysor which will work over WiFi). .These
> apps can be downloaded from the Play Store. A word of caution when
> using Vysor it can lock up some radios to the point you have to remove
> power from the radio to allow it restart. Another app that you might
> find useful for your Network Radio is Button Mapper. Some of these
> radios may come with extra buttons and knobs that might not do
> anything out of the box. With Button Mapper you can assign these
> buttons to various activities like to load a certain application or
> turn a rotary knob into a volume control.
>
> What to look for when buying a Network Radio
> First of all if you are in the USA, dedicated Network Radios can be
> little hard to come by since 100% of them are made in China. So
> usually you can’t walk into your local ham radio emporium and buy
> one.You can order them on Ebay directly from China but you have to
> wait about 4 to 6 weeks to get it. Fortunately since the popularity of
> Network Radios are increasing in the USA some US vendors are now
> providing them in a few days. These are typically unbranded models
> offered at a low price. A few US Amazon vendors are sourcing these
> radios, but check the prices carefully. Some Amazon vendors are over
> pricing the units since they can be a bit scarce. At any rate, you can
> typically have one in your hands in a few days if you can get it from
> a US vendor. Secondly brand names mean nothing since a given radio can
> be sold under several brand names for the exact same radio. As far as
> warranty repair goes, you can probably forget about that since most of
> these rigs come out of China. As an early adopter it might be best to
> just purchase a basic HT or Mobile/Base unit until situation
> stabilizes. A basic HT will run from around $130 to $225  and a basic
> mobile will run from around $200. Above all be sure you are buying an
> Unlocked GSM version with PlayStore installed. Not having these two
> features can severely limit the functionality of the radio.
> Alternatively you can find a few inexpensive rugged smart phones for
> around the same price as a Network Radio HT with a PTT side button
> that will work well as a Network Radio.
>
> What determines the cost of a Network Radio?
> 1. Size of the touch screen – The least expensive units will typically
> contain a 2.5 to 3.5 inch screen. Some models may sport a 4 inch
> screen but the  price increases significantly.
> 2. Android Version – You will find that most of the Network Radios
> will run a version 4 to 7. Higher is better.
> 3. Feature set – This is pretty standard across the board but radios
> from Boxchip is offering S700A with a 4 inch screen which also
> contains a VHF or UHF transceiver with DMR(which may not be certified
> for use in the US market) for $750 They also offer a $499 version
> without the transceiver. Street prices are around $699 to $399
> respectively. These radios are currently the “Cadillacs� of the
> Network radios.
>
> Getting Started
> You can explore Network Radio with Zello on your smartphone before
> investing in a dedicated Network Radio. The best place to start is to
> subscribe to the 8 channels called Network Radios. Just search for
> them with the Zello app and you should see them with a blue logo next
> to them. There are other amateur related channels that you can also
> explore. The Network Radios channels stay pretty busy 24/7 with a
> large number of users. The channels are generally populated with users
> from the US and Europe. The Network Radios group allow licensed
> amateurs operators as well as unlicensed operators. Amateur radio
> communication protocols are observed when communicating on the
> channels. Users have to be approved to use the channel by a moderator
> by speaking to a moderator, however anyone can listen to the channels.
> If your user name is a valid amateur license, typically you will be
> added to the channels automatically. Usually there are a fair number
> of moderators around on the channels, so approval can be pretty quick.
> If a user does not adhere to the channels rules, they probably will be
> removed pretty quickly. If you wish, you can use an assigned Network
> Radio callsign by asking for one from one of the moderators. These
> callsigns are usually assigned starting with NR and four additional
> digits following.
>
> When you first get started with Zello and subscribe to several
> channels things may seem a little confusing at first. This is because
> that Zello works like an old school scanner. Zello scans all the
> channels you are subscribed to and when one goes silent it jumps to
> the next active channel. If you want to stay on a channel you must
> change your status from Available to Solo and Zello will stick on that
> channel. There are a lot of settings that can affect how Zello works.
> Here is a pretty good users guide to setting up Zello for PTT Network
> Radio hardware, as well as a good general resource on Network Radios.
> Another good resource is the the Network Radio Facebook page with over
> 2000 members at this writing.
>
> Other Amateur Radio Uses
> While the bulk of Network Network radio centers around the use of the
> Zello app, there are other Amateur Radio modes that can be used that
> connect to the internet. Other ham related  apps that can be installed
> on these Network Radio devices since they are Android based devices.
> These include APRS, IRN (International Radio Network) using Team Speak
> 3, and Echolink. So in essence Network Radio hardware can be a very
> multi-functional radio that Amateur Radio operators should find
> useful.
>
> But is it Real Ham Radio?
> Getting back to the title of this article, is Network Radio real ham
> radio? It really just depends on how you define “Real Ham Radio�
> Amateur radio. Some amateur radio operators contend that because it is
> not a RF based communications technology it is not real ham radio.
> Well basically Network Radio is a RF based technology since it
> transmits a low power RF signal to communicate with a cellular tower
> or to a WiFi Hotspot. Some say it is not real radio because it is
> internet based. Well, that would eliminate such widely accepted
> technologies as DMR and D-Star communications over a hotspot connected
> to the internet. Also eliminated would be Echolink ,IRN and APRS. So
> that logic doesn’t really make since. Remember some amateur radio
> operators don’t see communications technologies such as WSPR or FT8 as
> “real ham radio�, but yet will claim that the ancient RTTY or even CW
> technology is. So you see really those that discount Network Radio as
> a viable Amateur Radio communications technology have sort of a
> non-forward thinking process going on. That’s ok though because the
> great thing about Amateur Radio is that everyone can find their
> favorite niche in the hobby and can contribute. No matter if it’s CW
> or Network Radio it’s all ham radio. Another objection that pops up is
> that non licensed users can use the technology. Well actually this a
> good thing for the hobby. As mentioned earlier, the Network Radio
> Zello channels accept both. This allows non-amateur radio users and
> licensed amateur radio operators to mingle and discuss communications
> technology. Therefore generating interest in Amateur Radio and
> attracting more users into the Amateur Radio service. There have
> already been members of the Network Radios channels who have gone on
> to obtain their amateur radio licenses. Some Amateur Radio operators
> feel that Network Radios could mean the death of traditional Amateur
> Radio. Not hardly. You have to keep in mind that Network Radio relies
> on cellular data and Wifi to work. If you lose those services then
> your Network Radio basically becomes a brick. So, RF based amateur
> radio will always be the “Last Mile� technology during disasters or
> other situations where traditional communications methods are not
> available. So, is Network Radio “real ham radio�, sure it is. Network
> Radio is just another technology that can be leveraged by Amateur
> Radio users to extend their communications ability. Network Radio
> won’t replace traditional Amateur Radio, but it can certainly augment
> it.
>
> Be sure to subscribe to Ham Radio Science YouTube Channel for future
> video’s related to Network Radios.
>
>
>
> --
> Este e-mail foi verificado em termos de vírus pelo software antivírus
> Avast.
> https://www.avast.com/antivirus
>
>
> ______________________________________________________________
> Esta mensagem é da exclusiva responsabilidade
> do seu autor e não representa nem vincula a posição
> da  ARLA - Associação de Radioamadores do Litoral Alentejano
> _______________________________________________
> CLUSTER mailing list
> CLUSTER  radio-amador.net
> http://radio-amador.net/cgi-bin/mailman/listinfo/cluster
>
-------------- próxima parte ----------
Um anexo em HTML foi limpo...
URL: http://radio-amador.net/pipermail/cluster/attachments/20191104/14b25590/attachment.html