Telefone wi-fi

Aparatul wi fi merge bine,l-am resetat,alte telefoane se conecteaza pe el. Doar asta nu se mai conecteaza. Oare ma poti ajuta? Am in xperia xa wi fi ul merge am testat pe alte routere dar cand vreau sa ma conectez la routerul meu.. De ce face asa.. Pana acum 2 zile mergea perfect, iar dimineata cand m-am trezit nu mai mergea. Ce treaba are conectarea cu memoria? Buna am un LG G3 si de 2 zile nu mai merge sa ma conectez la wi-fi imi arata prornire wi fi dar nu merge sa ma conectez nu pot sa apus pe buton.

Save my name, email, and website in this browser for the next time I comment. Sign in. Password recovery. Recover your password. Thursday, January 13, Despre androidblogger. Forgot your password? Understanding VoIP is easier if you have a basic understanding of how old-fashioned telephones work.

Most people have used an ordinary "land line" phone so often that the process seems instinctive. You just pick up the phone, hear a dial tone, dial, talk and hang up. To get from person to person, the call travels through the wires that make up the public switched telephone network PSTN. Your local phone carrier routes your call through a series of physical switches that eventually connect your phone to the other person's. This is called circuit switching. This isn't a particularly efficient way of making phone calls.

The entire circuit between the two phones stays open during the conversation, even though only one person is talking at a time. It's also open when neither person is talking. See How Telephones Work for more details on circuit switching. Wi-fi phones are part of the smartphone phenomenon. Click here to read more about smartphones. VoIP, on the other hand, uses packet switching. We'll look at packet switching and VoIP in more detail next.

VoIP uses packet switching rather than circuit switching. Instead of leaving an entire circuit open during the whole conversation, it breaks the conversation into small packets of data.

It then transmits that data over the Internet. Instead of monopolizing a circuit, packet switching sends and receives data as needed. Let's say you and a friend who uses the same VoIP service are going to talk to each other. You're using analog telephone adapters ATAs , which let you plug your regular phones into your computers. Here's what would happen:. It's an efficient process -- and it doesn't tie up the line when it doesn't need to. It can also be free.

If you're using a free service, like Skype, and calling someone else who also uses the same service, your call costs you nothing. But you might want to make phone calls when you're away from your computer, or you might just want to walk around while you talk.

With A WiFi phone has an antenna that transmits information to a computer, base station or wireless router using radio waves. An antenna at a base station or router picks up the signal and passes it on the Internet. You can read more about this process in How WiFi Works. Some VoIP services offer a cordless handset that communicates with a base station that plugs into your computer's USB port. These are more like cordless phones than mobile phones. They're not really WiFi phones since they're not capable of connecting to a WiFi network.

From their user interface to how they work, WiFi phones are a lot like cell phones. Both types of phones also send and receive signals as radio waves. The difference is that WiFi phones use different frequencies than cellular phones do.

Cell phones use MHz to MHz frequency bands. WiFi phones that use the Phones that use the When you make a call on a WiFi phone, you dial the number of the person you want to call, just like you would with a cell phone. If you're calling another VoIP user, you may enter a VoIP address instead of a phone number, depending on the service provider's requirements.

The phone translates the number you dial into packets of data. It uses radio waves to transmit the packets to a wireless receiver. The receiver passes the information over the Internet to the call processor like an ordinary VoIP call. When you begin your conversation, the phone transmits your voice in packets of data as well.

Your voice travels just like it does in a VoIP call, although the specifics can differ from one provider to another. Many of these phones use a specific WiFi service or network.

In order to use either of these phones, you need to have an account with that provider, just like you need a service plan from a cell phone provider to use a particular phone.

Either you or your service provider will configure the phone to work within the network. Other phones work with a protocol rather than a particular network or provider. SIP is an open protocol. Anyone can use it, and anyone who has a SIP address can contact anyone else who has one for free. It can also control other forms of communication, like instant messaging and video conferencing. Eventually, SIP will probably make communications tools interoperable.

In other words, your computer, phone, PDA and other communications tools could all share the same address book and communicate with one another. Some new cell phones use both WiFi and cellular frequencies. These hybrid or dual-mode handsets can change back and forth between the two networks.

The phone can take advantage WiFi networks when they are available and can use the cellular network the rest of the time. WiFi phones have a lot of potential, but right now they're not for everyone. Someone who has a cell phone and needs a phone line to support their DSL connection doesn't necessarily need yet another phone.

Anyone who lives in an area with little WiFi availability might not find many places to use a WiFi phone. People who don't have a network of friends using the same VoIP service may find it cheaper to use a land line or cell phone. But as more cities develop city-wide WiFi networks , WiFi phones will become more practical and useful. What currently seems like a novelty or a toy could become a replacement for a land line, a cell phone or both.

It could happen pretty quickly -- the WiFi phone market increased by 76 percent in , and researchers believe it will double in [Source: Infonetics Research ]. WiFi phones are already useful on a smaller scale in businesses and schools. Students who live on college campuses that have extensive WiFi networks can also use WiFi phones to make calls for little to no money. Users have also reported some quirks in newly-released phones that make using them a little tricky.

For example, some phones reset every time the user moves to a new wireless network or every time an administrator makes a change to an existing network.