08.08.2020

Wireless telephony. SIP phones are cordless. PoE technology for ip phones


Wireless technologies are becoming more and more relevant day by day not only for offices, but also for residential buildings and apartments. After all, they make it possible to make the user more mobile, to increase the comfort of his communication during working or non-working hours.

WiFi phone transforms a classic telephone into a convenient, compact and mobile device, which you can easily take with you to another room, bathroom or kitchen, even go to the site or to the entrance.

Benefits of WiFi phones

A WiFi phone is especially convenient for a private house with a large living space. The use of WiFi data transmission technology allows you to provide a high-quality signal to all territories without interruptions and interruptions in communication, as can be the case with a conventional radiotelephone.

A WiFi phone is indispensable for offices of large and medium-sized companies, where a lot of computer and other equipment is installed, and therefore unnecessary wires are a huge inconvenience. In addition, a WiFi phone is practical for the employee himself, as it allows him to communicate with clients or partners, freely moving around the office.

It should be noted that the WiFi phone is easy to install and does not require additional communications - communication and operation is carried out using wireless technology. This significantly reduces installation and operating costs, and also allows these types of telephones to be mounted in rooms where there is no wired local area network.

Almost every WiFi phone also supports a standard wired connection, and therefore, if necessary, can use it this way. Many devices are equipped with a dozen additional functions- support for multiple lines, the ability to work in networks with different communication standards, control, call forwarding and hold, etc.

WiFi phone in the store website

If you need a modern WiFi phone, you can easily find a suitable model in our online store. The assortment includes devices from the world's leading manufacturers in various price ranges. Therefore, whatever the priority for you - financial benefit or functionality, you can always choose a model in accordance with your requirements and capabilities.

In addition, our experts will help you choose not only a WiFi phone, but also accessories for it.

Gradually expanding its capabilities, quickly responding to market needs, IP telephony today offers consumers not only a standard set of functions, but also flexible, completely new solutions. One of the innovative trends in the development of VoIP technology is a WiFi IP phone, the basis of which was wireless standard exchange of information. Support of IP telephony devices for Wireless Fidelity (Wi-Fi) technology provides interaction of subscribers by connecting phones to a computer IP network wirelessly, which does not require the laying of additional kilometers of cable.

After the first WiFi SIP phone was presented to users who quickly appreciated the convenience and mobility of using such devices, another struggle began between manufacturers to attract a new customer audience. The game continues on the market, and today not only Wi-Fi phones of well-known brands are available to consumers, but also wireless solutions from companies that are just starting their development.

WiFi IP phone - the benefits of using

Wired IP telephony solutions, abundant on the market, no longer satisfy the needs of users who regularly move geographically. The implementation of the DECT standard makes it possible to expand the possibilities of communication, but still does not completely ensure mobility of movement, since the handset is tied to a DECT base, which, nevertheless, is connected to a computer network more often by wires.

Wi-Fi IP phone is optimal for use in the following conditions:

  • enterprises deployed over a large area, where employees, moving through the territories, must always remain in the communication zone;
  • using a SIP Wi-Fi phone in companies with distributed offices, employees can change their location, remaining tied to a specific number;
  • WiFi SIP phone will become a great solution and for home users who want a single communication device for travel, work and home.

Among the advantages that any WiFi IP phone possesses are:

  1. Deploying high-quality communication without laying cables, which is especially important for hard-to-reach points.
  2. Support for access to networks of mobile devices.
  3. Guaranteed interoperability of devices from different manufacturers.
  4. Support for the Wi-Fi standard ensures the operation of these devices around the world.

Capabilities of IP phones from different manufacturers

Trying to understand the characteristics and capabilities wireless WiFi IP phones, we have selected several models for comparison different manufacturers operating on the SIP protocol:

  1. Welltech WP589 is a phone from one of the leading Taiwanese manufacturers.
  2. AddPac AP-WP100 is a phone from the Korean company AddPac Technology.
  3. Linksys WIP330 is a phone from an American manufacturer operating under the Cisco Systems brand. Since January 2013, the company has become part of the Belkin Corporation.
  4. ZyXEL P-2000W_V2 is a device of another, no less famous, Taiwanese company.
  5. DORO IP 700 WiFi is an IP phone of a Swedish company.

Each of the devices, having different functionality, at the same time supports a large number of similar functions. These IP phones have the following features:

  • work on wireless technology Wi-Fi;
  • SIP protocol support, which guarantees high quality of any type of information exchange (voice, video, text messages);
  • support for caller ID function;
  • built-in phone book;
  • transfer of calls;
  • support for call forwarding;
  • call hold;
  • memory dial / speed dial;
  • call history;
  • installation of tunes with the ability to adjust;
  • voice activity recognition function;
  • voice activity recognition function, which allows you to save traffic by pauses in the conversation;
  • support for the function of generating comfortable noise, which provides a sense of presence during pauses;
  • the implementation of echo cancellation allows you to avoid an acoustic twist (reflection of your own voice in the dynamics);
  • function keys;
  • displaying information on the phone display;
  • built-in encryption algorithms;
  • vibration alert;
  • watch;
  • calendar;
  • calculator;
  • alarm.

Distinctive features of WiFi SIP phones

In addition to common tools, each of the presented VoIP phones also has distinctive features.

This model from the Taiwanese company Welltech provides the ability to register 2x2 (two accounts on two servers), as well as support for IP PBX. If necessary, the firmware can be updated via the Internet.

Users will undoubtedly be pleased with the possibility of using standard Nokia batteries, which last for more than 150 hours of operation. It is also possible to connect to a PC or laptop using the MiniUSB interface.

In addition to the standard set of Wi-Fi IP phones AddPac AP-WP100 can be used in IP broadcasting systems. The device serves as a signal source using an external source connected to the 3.5mm-jack socket or its own microphone. Installing Smart Messenger software will allow you to control your phone from a regular computer.

Network capabilities of AddPac AP-WP100 are quite diverse - they are NAT / PAT support, optimization of network resource allocation, DHCP server, VRRP protocol support, data routing.

3. WiFi IP Phone Linksys WIP330

Convenient, and most importantly intuitive interface of settings and management in combination with

advanced functionality will undoubtedly please the most advanced users. Ease of setup, built-in web browser, web browsing, work with by e-mail, as well as the ability to receive streaming video.

Another feature of the Linksys WIP330 is an adaptive jitter buffer (data transmission delays typical of the Internet), which compensates for jitter for better sound quality.

This device is endowed with a built-in WEB-configurator, support for auto-initialization, and the ability to connect a headset.

The phone provides the ability to set the mode walkie talkie when the devices communicate directly, bypassing access points and SIP servers.

Firmware upgrade via Wi-Fi, strong WLAN encryption / Wi-Fi network, possibility

WLAN Search Using Site Survey Commands, Implementation automatic login to the network, no impact when moving between access points.

Some more differences

Comparing these IP Wi-Fi devices, it is also desirable to note the following points:

  1. Wi-Fi ip phone Welltech WP589, AddPac AP-WP100, Linksys WIP330 and DORO IP 700 WiFi have color displays, while ZyXEL P-2000W_V2 has a monochrome screen.
  2. The phones support a different number of SIP servers:
    • Welltech WP589 - up to 4;
    • DORO IP 700 WiFi - up to 6;
    • other devices - from 2 to 4.
  3. The AddPac AP-WP100 SIP wi-fi phone, as well as the Linksys WIP330 wi-fi ip phone, support the ability to create conference calls. In addition, the Linksys WIP330 is the only one on the list to offer video conferencing support.
  4. NAT support, implemented in the AddPac AP-WP100 and Linksys WIP330 devices, allows you to translate internal IP addresses into external ones and use a single address to access the Internet.
  5. SIP wi-fi phone Welltech WP589, in addition to IP telephony, can work as a regular GSM device.

SIP wi-fi phone - convenience and mobility

Concluding the review, I would like to once again note the functionality and mobility of movement, which is provided by the development of a new branch of IP telephony. The compactness of devices, the lack of binding to a specific place, a variety of functions make wireless devices more and more popular. Well, the final choice should depend on the wishes of a particular user and those requirements that he makes to the phone.

IP phone and VoIP telephony

What is an IP phone? It is a telephone set using VoIP technology and digital IP network for voice transmission. Therefore, these devices are also often called VoIP phones or sip phones(by the name of the most common connection establishment protocol). V modern world the Internet penetrates into all spheres of our life, greatly simplifying and reducing the cost of all information transfer processes. Ordinary traditional telephone communication is no exception and fades into the background. It is being increasingly displaced ip telephony for office and home using technology VoIP (V oice- o ver- IP). This is a new generation technology that for voice transmission instead of the usual wire line uses the internet. Data is sent over the Internet, rather than over traditional telephone wires, which guarantees a high quality connection. And, thanks to this, calling another continent is as easy as calling a neighboring house, and it is not expensive at all. The use of VoIP gateways allows connecting analog and digital networks, thanks to which IP telephony users can talk with subscribers not only of IP PBX, but also of any analog PBX. To conduct conversations using IP telephony, you can use both ip phones and softphones installed on computers. The latter, strictly speaking, are not IP phones, since when the computer is turned off, the softphones can no longer ring or receive a call.

Benefits of IP telephony

In addition to the usual functions of traditional telephone connection(speakerphone, function buttons and speed dialing keys), IP telephony has much wider possibilities:

  • low rates IP telephony to commit long distance and international calls;
  • independence from location, ip the phone can work from anywhere in the world;
  • adding new phone numbers within the framework of an existing connection;
  • indication of the presence of the subscriber("Away", "Do Not Disturb" modes);
  • comfortable and flexible customization different options redirects;
  • voice mail with indication of received messages;
  • redirect - call transfer without answering the call;
  • safe calls from signal encryption;
  • dispatch and getting text messages;
  • holding conferences.

However, it should be borne in mind that these functions can be used in full only when constructing the entire corporate network based on the equipment of the same manufacturer, since different vendors additional features implemented in different ways.

IP Phones Functions

IP phones integrated with mini PBX provide the user with a number of useful functions... Here are the most popular ones:

  • Answering machine
  • Call transfer
  • Call waiting
  • Call forwarding
  • Programmable buttons
  • Phone book
  • Multiparty conference
  • Speed ​​dialing
  • Do Not Disturb Mode
  • Call hold

Let's reveal in more detail what these functions give:

  • Answering machine. Issuance of a voice message to the caller and the ability to record voice messages from him.
  • Call transfer... The ability to transfer an incoming call to another internal phone number, to a city number or to a mobile subscriber.
  • Call waiting. If an extension user makes a call but receives a call at this time, caller will hear short beeps, but if the called subscriber has a call waiting service, the calling subscriber will hear long beeps as if the called number was free. In this case, the called subscriber can put his call on hold and switch to the incoming call, and then continue the first conversation.
  • Call forwarding... Function of redirecting an incoming call to another extension. There are several call forwarding options.
    • Unconditional call forwarding. In any case, all calls are sent to the specified number.
    • Call forwarding on busy tone. In case of employment this subscriber, the call is forwarded to the preprogrammed number.
    • Call forwarding on no answer. Calls are redirected if the subscriber does not answer within the specified time.
  • Programmable buttons. These buttons allow you to program frequently used functions for quick access to them. For example, entering the menu, entering the address book, transfer, speed dialing and others.
  • Phone book. Local and remote phonebooks allow you to save and edit subscriber phone numbers with their names or other identifying information.
  • Multiparty conference. Depending on the models of the ip phone and mini PBX, this function allows you to combine three or more subscribers, both internal and external, into one conversation.
  • Speed ​​dialing... The ability to dial a number from the phone's memory by pressing a function button, programmed for this task, with one touch.
  • Do not disturb mode... V this mode no calls come to the ip phone, and the subscriber calling it receives a DND (Do Not Disturb) tone.
  • Call hold. When a call comes in during a call, you can put the current call on hold and answer the second call. In this case, the conversational part of the ip phone switches to the second subscriber, but the connection with the first subscriber is not broken, and you can return to the first conversation.

SIP Phones Selection Parameters

For the right choice SIP phone, we first define what parameters they differ in and what these parameters affect:

  • Number of lines;
  • Number of SIP accounts;
  • The presence of the display and its parameters;
  • Interfaces connections:
  • Number of Ethernet ports;
  • Support for various protocols establishing a connection ;
  • Support network protocols;
  • Possibility wireless work;
  • Connector presence to connect headsets;
  • Meals

Technical characteristics of SIP phones

TO technical specifications sip phones include:

  • The number of lines. This is the number of simultaneous phone calls. Wireless IP Dect phones have the ability to simultaneously conduct conversations from different radio handsets through one base. In fixed IP telephones, if there are two or more lines, it is possible to put a conversation on hold and receive a call on another line. The number of simultaneously supported conversations is especially important for SIP DECT phones, when each wireless DECT handset has its own SIP number.
  • Number of different SIP accounts(accounts). An account is registered with a SIP provider and contains two parts (like an e-mail): first, the login itself, and then, after the @ sign, the server address. Several SIP accounts - this is the ability to work with several providers, which makes it possible to reduce communication costs in certain directions. As a rule, each account SIP matches your phone number.
  • Display options: color / monochrome, size, resolution, display languages. The required screen properties are determined by the tasks that a particular telephone set must solve. For calls to several pre-programmed numbers, it is enough to have a one-color display with a low resolution or even a phone without a display ..
  • Interfaces connecting to local network: Ethernet, Wi-Fi, Bluetooth. Fixed ip phones and base ip dect phones are connected via a wired Ethernet interface using an RJ45 connector. Wireless ip phones - Wi-Fi, BlueTooth.
  • Number of Ethernet ports... There can be two or one data ports. If there are two Ethernet connectors in the device, it itself can serve as a router for connecting to a local network through it. personal computer... Or, conversely, with a computer already connected to the network, you do not need to install an additional switch. The RJ45 connector is removed from the computer and plugged into the device, and from it a wire with two RJ45 connectors is connected to the computer.
  • Connection establishment protocols support VoIP: SIP, SIP v2, H.323, MGCP, etc. Most likely, you will need an ip phone with SIP support, since this is the most common protocol at the moment. However, this point should be clarified, because your voip telephony service provider or PBX may work with a different protocol, for example, H.323.
  • Network protocol support: TCP / IP, DHCP, NAT, HTTP, HTTPS, FTP, etc. Support for certain protocols is needed to implement the corresponding capabilities of IP telephony. For example, TCP / IP provides packet data transmission via the Internet; DHCP needed for automatic distribution of IP addresses to telephones; NAT- to work with routers; FTP- for transferring files; HTTP- to receive information from WEB-sites, for example, weather forecast; HTTPS- This is HTTP with data encryption;
  • The ability to work wirelessly. IP phones can support the DECT protocol, in this case, the base is connected to the local network via the Ethernet port, and DECT radio handsets communicate with the base via a wireless protocol. It is also possible to connect the phones themselves to a local network using Wi-Fi and Bluetooth protocols.
  • Headset jack... This option allows you to use an ip phone with a headset, which provides not only improved sound quality, but also increases the efficiency of employees through the use of hands and the ability to do certain work during a call.
  • Nutrition: local from network adapter or remotely via Ethernet using PoE (Power-over-Ethernet) technology. Power over Ethernet (PoE) capability eliminates the need for each IP device to have its own power adapter and 220 V outlet.

IP phone manufacturers

Due to the widespread use of IP telephony, a wide variety of IP phones has appeared on the VoIP telecommunications equipment market. The best devices are now from the following manufacturers:

  • Cisco
  • Avaya

If Cisco and Avaya products are more designed for corporate use in the field of large and medium-sized businesses, then Panasonic, Yealink, Gigaset and Grandstream produce, among other things, budget models that are perfect for small businesses or for home.

USB SIP phones and ip devices with Ethernet connection

In order to make calls using an ip phone, it must be connected to the Internet. This can be done through usb port computer or Ethernet LAN connector. USB phone is a device that connects to a computer with installed on it software softphone, such as Skype, Viber, Net2Phone, etc., and replaces the headphone and microphone. It is convenient for voice communication between users. computer networks... If the device supports the sip protocol, then such a usb sip phone can be used to make calls using sip telephony, which will be discussed below. A USB phone is not capable of independently making and receiving calls without a computer, and, in principle, with a headset, it can be completely replaced by software.

An IP phone connected to a local network via an Ethernet connector is a full-featured device capable of making and receiving calls via an IP network independently, without a computer. Outwardly, such a device looks the same as a conventional wired analog device. It supports all the functions of the usual telephony, as well as additional IP telephony capabilities. The device can have two Ethernet ports and serve, in this case, also a router for connecting a computer.

IP phone with 2 Ethernet ports - Grandstream GXP-1620:

Wired and Wireless IP Phone

Wireless IP Phone Gigaset A510 IP:

SIP protocol support

One of important parameters the ip of the phone is SIP protocol support which is currently the main protocol VoIP telephony... What is this protocol - SIP?

In order to start and end an IP telephone session, a certain standard is needed, which are the H.323, MGCP, SIP protocols. The widespread use of voip-telephony began with the approval of the recommendations of the Session Initiation Protocol, in translation - "session establishment protocol". The SIP protocol was at the heart of Voice-over-IP. In addition to IP telephony, the SIP protocol also includes the exchange of multimedia data: audio and video conferencing, instant messaging, and online games. The protocol describes how terminal equipment can request the start of a connection from another client on the same network, but possibly remote on great distance using his unique sip account. SIP defines the way in which subscribers negotiate the opening of data transmission channels based on other protocols, which will then be used to transfer information.

Benefits of SIP:

  • Mobility sip telephony subscribers are very high, you can travel all over the world keeping your sip number;
  • Maximum extensibility and compatibility with older versions;
  • Compound occurs as much as possible quickly;
  • Clear addressing like e-mail;
  • Simple open protocol;
  • Saving traffic the Internet.

Currently, it is the SIP protocol that is the most widespread, and the devices that support it are called SIP phones. For some manufacturers, even the model name itself contains the abbreviation SIP.

SIP phone Yealink SIP-T21 E2:

IP phone with headset

IP phone with headset - Panasonic KX-HDV130RU:

PoE technology for ip phones

Power technology P over- o ver- E thernet (PoE) transmits power to ip phones over the local network via Ethernet. PoE models do not require a power supply and a separate 220V power outlet to connect the adapter. Most of the IP devices have such an opportunity. However, it should be understood that if additional devices are connected to the device, for example, the console of additional speed dial buttons, the power from the local network will not be enough and you will have to connect the adapter.

IP phone powered by Ethernet line - Yealink SIP-T21P E2:

Manufacturers and brands of IP phones

Described below the best manufacturers budget ip phones with their advantages. We hope that the recommendations below will help you make the best choice for an IP phone.

Panasonic IP Phones

The advantages of the products of the Japanese company Panasonic are:

  • High sound quality;
  • Reliability;
  • Possibility to use all major functions VoIP SIP telephony even in the budget segment.

Panasonic IP phones can be divided into two groups:

  1. Wireless convenient for mobile use within an enterprise or at home
  2. Stationary, for office and for home

Panasonic KX-TGP500 and KX-TGP600 belong to wireless VoIP DECT solutions. The TGP600 is a further development of the "five hundred" model. With a difference in price of less than 10%, "six hundred" has a number of advantages:

  • the number of connected wireless handsets - 8 (instead of 6)
  • number of simultaneous calls - 8 (versus 6)
  • increased talk time on dect handset up to 11 hours (for TGP500 up to 5 hours)
  • color display (not single color)
  • the ability to connect a fixed DECT telephone Panasonic KX-TPA65
  • use of DECT repeaters Panasonic KX-A406CE to increase the range

It should be noted that KX-TGP600 can work with eight sip accounts and have eight simultaneous calls, while other manufacturers usually have the second parameter less than the first, and it may turn out that when trying to call all lines are busy. When choosing a wireless IP device, based on the price / quality ratio and functionality, the recommended model is Panasonic KX-TGP600. You can choose a headset for this model.

Photo of radiotelephone Panasonic KX-TGP-600 with SIP support.

Panasonic KX-HDV100RUB and KX-HDV130RUB- new models from Panasonic, but already received good feedback buyers. Panasonic did the seemingly impossible: created fully functional high-quality devices for such a low price. These models work well with both conventional hardware IP PBX and Asterisk software IP PBX, and can also be used by IP operators, thanks to the Broadsoft DMS (Broadsoft Device Management System) certification. And in order to get the maximum sound quality provided by HD Sonic technology, we recommend operating these devices with the specialized Accutone TB7RJ-AKR-U10PS headset, designed specifically for the HDV series.

The budget IP phone Panasonic KX-HDV100 in terms of communication quality and VoIP functions is not inferior to more expensive products of other brands, it works with one SIP line and one Ethernet line. The "older" model KX-HDV130 is only one third more expensive, but it features support for two SIP accounts, two Internet lines, a speakerphone (loudspeaker) and the ability to power over Ethernet (PoE). Externally, both models look exactly the same, except for a headset jack and two Ethernet ports on the HDV130 instead of one on the HDV100.Each of the models available in two color cases: white and black.

Panasonic KX-HDV100RU White:

Yealink IP Phones

One of the leading providers of IP phones on Russian market is a Chinese company Yealink Network Technology, which focuses entirely on IP solutions in the field of telecommunications. The company produces convenient, functional and easy-to-use IP devices. The advantages of Yealink IP phones are:

  • Good ergonomics;
  • Support for a large number of protocols establishing communication, transferring information, compressing voice traffic;
  • Wide compatibility with leading manufacturers of IP PBX;
  • Competitive price.

An example is the apparatus entry level SIP-T19 ​​E2. It works with one sip-account and according to its technical characteristics is an approximate analogue of Panasonic KX-HDV100RU. The dimensions are slightly larger than those of the HDV100, the ergonomics are slightly better.

If you need an inexpensive IP phone with several SIP accounts, then you can choose it according to the table below.

Yealink budget line Yealink IP phones of the SIP-T series show the best results in sound quality when using the Accutone TM7RJ-AKR-U10-PS headset, and are suitable for W52P

Gigaset IP phones

The German company Gigaset from Munich is one of the leading manufacturers of telecommunications equipment. The company presents innovative solutions in the field of traditional and IP telephony for offices and home use. Gigaset launched on the market a good line SIP DECT devices. The main features and benefits of Gigaset ip phones are:

  • Free calls worldwide between Gigaset ip phones via the network Gigaset.net;
  • Ability to work with digital lines SIP protocol and analog line;
  • Access to information online services(weather forecast, RSS feeds);
  • View mailbox e-mail;
  • Vibrating alert.
with answering machine and support for three simultaneous lines - 2 SIP and one analog:

IP phones Grandstream

The American company Grandstream has been successfully producing a full range of equipment for IP telephony using the SIP protocol for a long time. The main emphasis is on budget segment... IP telephones Grandstream are reliable and easy-to-use devices for a wide range of end users, both private and corporate. Due to their orientation towards the open SIP protocol, they are compatible with various systems, software and servers of various manufacturers. The advantages of the Grandstream devices are:

  • Excellent ergonomics;
  • High sound quality;
  • Affordable price.

Budget model of an office IP phone with one SIP account - Grandstream GXP1610:

Office Phone with SIP 2 Lines and Power over Ethernet (PoE) - Grandstream GXP1625:

The budget models of IP phones of the above brands are comparable in terms of quality of work and price. Yet what is their difference?

Peculiarities Yealink:

  • Nice ergonomics;
  • Convenient WEB-interface for settings;
  • High performance.

Advantages Panasonic:

  • Possibility settings via WEB or download config file ;
  • Twocolor variants of devices, which is sometimes important for compatibility with the interior of the office;
  • SIP DECT models support more simultaneous calls at a lower price point than other brands.

Peculiarities Gigaset:

  • Work with SIP lines and analog new;
  • Free calls via the gigaset.net network

Differences Grandstream:

  • The most budget price;
  • NS good ergonomics.
Model name Yealink Number of SIP accounts Telephone lines

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