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Adapter from SIP phone to analogue. SIP adapters. Optimal choice of adapter

Easy to connect and configure, SIP adapters allow you to convert voice information into data packets for transmission over Internet channels. Installation of equipment makes it possible to reduce the cost of traditional communications.

Features of SIP adapters

The Univoice company catalog contains several brands and models of similar equipment, each of which is available for order. Features of the technology include:

  • compact size and wide functionality;
  • the ability to organize conferences in audio and video format;
  • recording and listening to conversations;
  • possibility of recording and statistics of telephone conversations;
  • high quality of communication, absence of interference and noise.

You can purchase an adapter of this type for installation in an office or apartment. The main advantage of using technology is the reduction in communication costs with subscribers.

Advantages of ordering equipment from us

The Univoice company sells equipment from the world's leading brands. You can buy a SIP adapter from us for a private home, business, public building or office. The equipment comes with quality certificates and guarantees.

If a client has questions about technical characteristics, our managers will be able to tell you about the features of each model. You can place an order on the website or at the company’s office, as well as by phone.

Nowadays there are many communication options. The most profitable tariff not only in Russia, but throughout the world is In addition, neither a mobile connection nor wired standard telephony can compete with it. To make communication with any part of the planet using an IP connection more convenient, experts recommend using a SIP adapter. It will allow you to communicate even when you don’t have a computer at hand. This option is especially convenient for people who regularly negotiate by phone.

SIP adapter, what is it?

By definition, most users of this telephone service use a PC complete with a special headset to make conversations. Thus, the possibility of making calls when the computer is turned off is eliminated. Other inconveniences include:

  • After turning on the PC, it will take quite a long time to boot;
  • It is possible that the computer will be busy at this moment;
  • To ensure communication, additional devices (headset) will be required;
  • If the PC is not connected, you will not be able to receive an incoming call.

Lack of privacy is another problem for the user. Discussion of personal topics, provided that on the same PC someone is simultaneously performing the necessary actions, is excluded. Are there options to make conversations over IP telephony convenient? Yes, if you buy and put into practice a VOIP adapter that connects to the Internet.

What is a SIP (aka VOIP) adapter and how does it work? This is a small box equipped with indicators (LED). Connects to the Internet using a router or similar equipment. An ordinary traditional telephone set, which is used in a wired telephone connection, is connected to the device.

To activate a SIP adapter, you must first configure it to communicate with the server of one of the operators or your own SIP server. Parameters and corresponding settings are entered via the web interface. Upon completion of all the above manipulations, the phone is connected and the ability to make calls is checked.

Attention!

We would like to clarify that the need for a PC is exclusively at the first stage in order to set up the connection. After this, outside interference is excluded, since the SIP adapter functions independently.

A typical VOIP adapter only has two ports. A WAN port is used to connect to the Internet.. To connect a phone and activate the station, you need an FXS port. Pairing with a computer, necessary for setup, involves using the first port. There is a connector to connect to a power source. Some models also have other ports that allow you to work with a PC or connect another telephone.

Additional options for SIP adapters:

  • Noise absorption - especially important when the phone is in a place where it is too noisy;
  • The ability to use the services of two providers/servers allows you to optimize communication costs;
  • Availability of Wi-Fi connection - no need to lay cables or pull wires;
  • You can work with several accounts - this is especially true if separate access to communication services is practiced;
  • Number identification is very convenient, especially if the main point is to receive incoming calls;
  • Conference calling – you can communicate with a group of people at the same time;
  • Holding a call and waiting for it – alternate communication with different users;
  • Speakerphone – the ability to carry on a conversation without contacting the phone;
  • Skype support – financially profitable IP-telephony and Skype at the same time.

There are many other options that make communication more convenient and functionality wider. Usually the full set of available functions is indicated in the technical data sheet, which comes with this device.

Popular brands of SIP adapters

Before making a purchase, it is advisable to understand which models are the most relevant:

  • Cisco SPA112;
  • Grandstream HT701;
  • Cisco SPA122.

The first model released by a world-famous brand is distinguished by its simplicity. It has a port for connecting to the network and two ports needed to connect phones. In this case, you will not be able to manage calls. Call holding and call waiting functions are not provided, as is conference calling. But there is an option that allows you to use traffic sparingly.

Cisco SPA122, a device with characteristics similar to the previous model. There is the ability to connect to two or more servers, an echo canceling function, router and voice gateway options. The model can also generate noise, which allows you to replace silent pauses in a conversation. There are two ports to connect phones.

Grandstream HT701 has only one port, which makes it possible to connect only one phone. But at the same time, the functionality is expanded here. There is caller ID, conference calling, and the ability to hold calls and put them on hold. Despite the inherent ease of use of the model, its functionality is impeccable.

Which adapter to choose

Before making a purchase, you need to decide what functionality you need for comfortable work. If you need to call periodically, the simplest option is sufficient. If you want to combine Skype with this type of telephone connection, you will need to buy the appropriate model. For use in home mode, connecting one device (phone) is enough, therefore, the adapter must have one port designed for this purpose. A more complex option is suitable for work calls.

Optimal choice of adapter

If you don’t have time to understand all the intricacies of this type of communication, but have the desire to communicate over the phone with loved ones, colleagues, and friends as profitably and for as long as possible, you have a good opportunity to use the services of a free virtual PBX.

Telephone VoIP adapter(aka SIP adapter) - what is it: an inexpensive device that allows you to start fully using IP telephony services or a half-hearted solution that is more likely to cause dissatisfaction with new technologies? Let's try to figure it out!

You've probably already heard about a significant reduction in the cost of telephone calls over city, intercity, international and cellular communications using IP telephony. And, delving into the new topic of mastering economical technology for transmitting speech over Internet channels, we found on the Internet two options for technical “upgrading” of the analog telephone equipment operating in your office. These options consist of using additional devices that are connected either directly to the telephone set, or, if you have a private PBX, by installing into it a proprietary expansion card produced by the manufacturer of this station. Note that not all PBXs provide the possibility of such an expansion, and if it does, the total cost of the board and the required reprogramming of the office mini-PBX by the integrator company after its installation is about $10 thousand. So, instead of such an upgrade, it is better to simply replace the existing analog station with an IP-PBX, it will be noticeably cheaper. That is, the option with an expansion card, as it is very expensive, is eliminated.

In the case of the first option, which can be called “terminal”, either VoIP telephone adapters or VoIP gateways are used. These devices are often confused by calling a VoIP adapter a VoIP gateway or indicating that a VoIP adapter differs only in that it has a small number of telephone ports (usually up to 10), while several dozen phones can be connected to a VoIP gateway . But VoIP gateways can have 1-2 telephone connectors and are not called VoIP adapters.

A VoIP adapter is also known as a “SIP adapter” because the main protocol for establishing a communication session in IP telephony is SIP (Session Initiation Protocol). There are two more names for these devices - “ATA” (analog telephone adapter) and “FXS adapter” (the latter indicates that the device has an FXS port, connected by cable to the FXO port on a telephone or fax machine).

So what is the difference between a VoIP telephone adapter and a VoIP gateway? By what criteria can you make the optimal choice in favor of one of these devices?

The simplest VoIP adapter has one WAN and LAN port for connecting to the Internet and an internal computer network, plus one connector for connecting to an analog telephone.

In answering the questions posed, it is worth emphasizing that many well-known manufacturers of VoIP telephone adapters classify them as entry-level IP telephony equipment aimed at users from the SOHO sector (Small Office/Home Office). This purpose “sets” the minimum price level for devices that use inexpensive and, therefore, not the best-performing components.

For example, to convert speech into discrete data packets sent over IP networks, a VoIP adapter uses a processor with lower processing power than a VoIP gateway. And this, naturally, affects the quality of voice conversion and reproduction.

But if consumers are ready for such troubles, considering the price factor to be the determining factor for choosing a device, then the reliability and stability of its operation (again, determined by the characteristics of the element base) will perhaps make the most “stingy” buyers of IP telephony equipment think twice.

Some manufacturers of VoIP/SIP adapters directly indicate that these devices are produced for consumers who are not very concerned about communication reliability. And on Internet forums, users of VoIP/SIP adapters rate their reliability and stability as “poor” or “close to satisfactory.” And they advise “not to skimp on your peace of mind.”

Alternative to VoIP or SIP telephone adapter

The functionality of VoIP gateways and VoIP telephone adapters is almost identical, which is what marketers of the latter rely on. Both devices provide automatic assignment of IP addresses, the ability to update software online over the Internet, protection against unauthorized access is provided by a password, dynamic network control is implemented to reduce interference and routing, as well as a number of other important functions accompanying the main one - “entry” analog telephone into an IP telephony network.

Telephone VoIP/SIP Adapter: Purpose Determines Capability

The Cisco ATA-186 SIP adapter has two FXS ports for connecting two analog phones. It is configured using the built-in pre-recorded voice messaging system that performs call routing (Interactive Voice Response - IVR) or using the built-in web server.

However, as noted above, VoIP adapters do not provide levels of reliability, stability and quality of communication acceptable to many users, and in these indicators they cannot compete with VoIP gateways, the circuit solutions of which are based on the use of high-performance processors and other electronic components of higher quality. class than in VoIP adapters.

For example, even AddPac Technology's VoiceFinder AP200D dual-port VoIP gateway, marketed for small businesses, uses a high-performance 32-bit RISC processor running the APOS operating system, providing high levels of reliability, scalability, stability and quality of service (QoS) . The most advanced voice compression algorithms used in it ensure flawless speech transmission even at low levels of communication channel bandwidth.

Another model of the VoiceFinder brand is AP2330, to which up to 24 analog devices are connected. In addition to the RISC processor, it is equipped with ROM (4 MB), RAM (64 MB), as well as two 10/100Mbps Fast Ethernet (RJ45) network interfaces. All this is installed here to ensure high quality and reliable communication.

To interface with telephone network devices, VoIP gateways can support three types of interfaces: 1) analog FXS - for connecting telephone sets, 2) analog FXO - for connecting to an analog PBX, 3) digital ISDN PRI/E1 - for connecting to a digital PBX.

Telephone VoIP/SIP Adapter: Purpose Determines Capability

Any small business grows over time, and with an increase in the number of employees it will be necessary to increase its subscriber base. Moreover, if a company has VoIP telephone adapters installed, then in order to expand the number of IP telephony users it will be necessary to purchase these devices. Therefore, even based on this premise, from the very beginning of business activity it is worthwhile (in accordance with the development plans of the enterprise) to purchase a VoIP gateway with a “reserve” of ports to which new subscribers can be connected.

24 analog landline phones can, of course, be “hung” on an eight-port VoIP adapter, for example, Linksys SPA-8000 - three analog devices for each FXS connector. But with this expansion, all telephone “triples” will have one number, that is, it will be possible to talk on one of three devices connected to one connector, and two subscribers will be forced to “stand in line.”

Let us repeat once again the arguments in favor of choosing VoIP gateways, which were mentioned above - higher rates of voice transmission quality, reliability and stability of communication than SIP adapters.

In addition, most VoIP gateway models have administration capabilities, bandwidth management and network security, as well as prioritization, accounting and analysis of various types of traffic.

If the company has employees working from home, then for them the best hardware solution for IP telephony will no longer be a VoIP gateway or SIP adapter, but a SIP phone, the setup and use of which is even simpler.

Thus, despite the fact that VoIP/SIP adapters today are actively offered as a budget start to start using IP telephony services, a successful start can only be guaranteed by more reliable and high-quality IP equipment: VoIP gateways, IP phones, IP PBX.

A VoIP adapter is a device that is used to connect landline phones to an IP network. The work uses the SIP protocol, due to which the devices are often called SIP adapters. Standard basic models have three connectors that allow you to connect a landline telephone, the Internet and a computer (laptop or system unit). As a result, a simple phone can join the Internet without requiring the purchase of a new IP phone. Some models have two FXS ports for connecting several landline phones.

Features of using adapters

The VoIP telephone adapter is classified as SOHO (home/small office), so such equipment falls into the affordable price category. Unlike a VoIP gateway, adapters use a more simplified processor with little processing power. The functional part of the devices (gateway and adapter) are similar to each other. When you connect a landline phone, it is assigned an IP address.
VoIP equipment has a single goal: converting the voice stream into an IP signal and back (for incoming calls). This allows you to save on telephony without overpaying for internal calls.

Setting up and connecting a VoIP adapter

Connecting a VoIP adapter is not difficult even for those users who do not have the skills to work with telephony and similar equipment. The device is connected to a landline telephone via FXS. The LAN cable is connected to the router. For the system to operate, stable Internet access is required. After connecting the cords, you need to install software that will allow you to configure the operation of the adapter. Management occurs via a web interface. The necessary software is supplied with the adapter (it can also be downloaded separately from the manufacturer’s website).

Basic features that the VoIP adapter provides:

  • Creation of audio and video conferences;
  • Recording conversations (you can listen to them via the web interface);
  • Analysis of call statistics from each telephone device;
  • Formation of a voice menu + reading (IVR);
  • Speed ​​dialing and blocking numbers;
  • Waiting, call forwarding.

Additional features vary by device model. All adapters support voice transmission in G.711, G.729A/AB and G.722 codecs. Due to this, high-quality signal transmission is achieved and sound is transmitted in HD without interference. Support for several protocols makes the adapter functionally indistinguishable from IP phones.

Pros and cons of using

VoIP and SIP adapters have the following advantages:

  • No need to buy new IP phones (adapters allow you to connect several landline phones, depending on the model);
  • Support for full-fledged business functions for corporate communications (voice menu, call recording, etc.);
  • Significant budget savings on communications (since the signal is transmitted not through the telephone network, but via the Internet);
  • Possibility of forming a corporate connection from anywhere on the planet.

Adapters also allow you to call mobile phones without overpayment. This is relevant for offices that periodically make calls to employees and clients. Additionally, users can combine their branches into a single network, even if the adapters are installed remotely.
However, VoIP and SIP adapters also have disadvantages. The main disadvantage is the relatively low degree of protection of the transmitted signal. Otherwise, we can talk about the advisability of installing the adapter in offices and other commercial premises for small and medium-sized businesses.