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Connecting IP telephony is an ideal solution for any business. Send employees to work remotely and continue to solve current tasks with maximum productivity!
Do you want to make cheap calls from home or office without the need for a PBX or expensive fixed line equipment? Connect with IP-telephony. Voice calls carried over data networks are of high quality, stable and inexpensive.
What is IP-telephony
IP-telephony is communication technology in which internet is used for calls instead of mobile network. Telephony is suitable for talking between two or more people with these connections:
- IP → IP. SIP conversation between subscribers of one or different PBXs.
- IP → ordinary telephone. Call from IP phone to cellular or landline phone.
- TCP → IP → TCP. Call from local phone to company's virtual IP number forwarded to employee's mobile number.
VoIP-, IP-, SIP-, Internet-telephony. What's the difference?
IP-, VoIP-, SIP-telephony are all similar to internet-telephony. But they have some differences from each other.
VoIP. Same as IP-telephony but with slight difference. Sometimes voice over IP is transferred with purpose different from communication between people (alarm system, video monitoring).
SIP. SIP protocol is used for communication.
Internet-telephony. Voice transmission is carried out by means of biggest IP-network - Internet.
What you need for working of IP-telephony for mobile
You don't need expensive and heavy equipment for IP-telephony to work. You do not need to wire or install antenna. All you need is internet supporting device and active internet connection.
How IP-telephony works
Working principle of IP-telephony is as follows:
- While making a call the analog voice signal is converted to digital.
- Digital signal is converted into compressed packets of data.
- These packets are transmitted through IP networks.
- Upon reaching the recipient, the packets are decoded into the original voice signals in reverse order.
- All these processes are carried out thanks to a number of auxiliary protocols and codecs.
Technologies used in IP-telephony
At the base of IP-telephony operation is the technology of packet compression. At digitizing and compressing data codecs - mathematical algorithms by means of which analog signal is compressed, are used.
Accordingly, all devices and software on their way from sender to receiver must support these codecs. Otherwise the quality of voice transmission will be compromised. Also IP-telephony is impossible without protocols - set of rules for information exchange which results in transmission and delivery of IP-packets.
Advantages of IP-telephony connection
Using IP-telephony it is possible to build flexible and distributed corporate communication networks with consideration of all business requirements.
Communicate with your customers anywhere via the internet
You can make and receive calls worldwide using any device that supports this type of connection. Even if you change office location, you will not have to change your number or re-connect the service. All settings will be moved to the new address.
Cost reduction for long distance and international calls
IP telephony allows you to minimize costs and make outgoing calls at low cost. Incoming calls are free, as are internal calls from one SIP number to another.
Any number code and flexible call handling
Different types of numbers are available for IP-telephony users: toll free, mobile, city, international. All you have to do is enter the correct number and you can call any city in the world, no matter where you are.
Multi-channel numbers allow you to receive multiple calls at the same time. Thanks to this you will not lose a single client.
Multichannel IP telephony numbers allow users to add other participants to the conversation by differentiating their communication. This feature is very important for companies dealing with customer calls.
SIP lines allow real-time control of the communication, avoiding conflicts and increasing sales efficiency.
Other business features of IP telephony
In addition to making and receiving calls, IP telephony has a number of other features:
- call forwarding;
- voice menu;
- call recording;
- notifications about missed calls;
- call statistics and others.
IP telephony offers the possibility of connecting electronic tools. It is compatible with corporate planning, accounting and management systems.
Calling via VoIP
Calling via VoIP can be done via usual phone or smartphone or via laptop, PC or fixed SIP-telephone.
How do I receive calls?
After connection of IP-telephony all incoming calls will go to special address (number). At first call comes to virtual PBX and then it is redirected to the device which subscriber uses for communication.
There are different telephony addresses:
- An address in an application, a SIP address. Has the form of an e-mail.
- Virtual number. Has the form of an ordinary mobile number.
- Internal short number in virtual IP PBX. When a call comes in, it is forwarded to an IP or regular phone based on the settings you have made.
Call and voice quality in IP telephony remains at a high level. Thanks to a good internet connection and use of modern, efficient codecs, speech remains clear, understandable and distinct during the entire conversation.
But to keep voice quality at a high level, you need to pay attention to the following points.
Internet connection speed. It must be at least 100 kb/s when using the G.711 codec.
Delay and jitter. Total voice transmission delay for calls must not exceed 400 msec. The higher the delay, the lower the call quality.
Modernity and quality of the codecs used. One of the best codecs is Opus.
Signalling protocols used
A conversation between two subscribers is impossible without the use of signaling protocols. They are used to transmit information between the phones and the PBX. The protocols used in IP telephony are:
- MSNP (for Skype)
- MGCP, MEGACO/H.248;
The SIP protocol is most often used to provide communication services. It is notable for its versatility, flexibility, ease of use and extensibility.
Using VoIP codecs
For one subscriber to hear what the other subscriber is saying, the spoken words are converted into compressed data packets which are then decoded into voice signals. All this happens thanks to the operation of VoIP codecs.
8 more benefits for you
IP telephony and virtual PBX connectivity offer a wide range of business opportunities at minimal communication costs. All you need to communicate is internet access, a smartphone, PC or SIP phone. The tasks you will solve:
- cost minimization
- Improving the efficiency of managers
- number retention when changing office location
- creation of a single multi-channel corporate network
- Be able to receive more than 100 calls at the same time to one number
- operator relief by customising the voice menu and greeting
- control of the sales team by obtaining negotiation statistics
- increasing the company's customer base and profits
There are different algorithms for voice digitization and compression. They differ in the degree of voice compression and the quality of voice transmission. Some of the codecs are open and some are closed and you have to pay for their use.
IP telephony connectivity equipment
Corporate telephony may consist of different devices. For making digital calls an IP device is installed which is adapted for different routing systems and network architectures.
Fixed computers, modern mobile devices and workstations may also be used. In these cases, installation of special software is required to use IP telephony.
Providing IP-telephony services: advantages of usage
Activating IP-telephony service enables you to call long-distance and international numbers at minimum cost. This technology of communication makes it possible to organize effective round-the-clock internal communication between departments and branches.
Instructions and tariffs for internet telephony "KataTelecom offers companies of all sizes the best tariffs. A wide range of virtual numbers in different formats and regions is available to our customers. You can find all current offers and prices for IP telephony on our website.
IP telephony services from KataTelecom
We offer to buy IP-telephony on the most favorable terms of cooperation and guarantee excellent quality-to-price ratio. We have different Internet-telephony tariffs for businesses of any size.
Study our offers and leave application for connection of IP-telephony and receive a personal commercial offer by e-mail. Or give us a call at the numbers listed on the website.
No matter where in the world you are, our staff will connect you quickly and inexpensively.
Get the most out of Catatelecom IP telephony plans KataTelecom maintains competitive prices in the market and high quality of communication. Describe your business needs and we will find the best deal for you. Check out our basic rates, leave a request for IP telephony connection and get a personalized quote by email.