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VOIP Powered Softphone Dialer App Development – Best Suits of #Linphone


Last updated: 26 September 2018

VoIP Mobile Apps for Audio & Video Calls

Being a Renowned Mobility provider of the softphone, We would love to provide more knowledge to the users with a lot of updated insights about Linphone customization in 2018. On behalf of this, we are updating our exiting blog article as per the current Mobile Dailer Application – VOIP standards.

Today, The VOIP Powered Softphone Dialer Apps are playing a vital role in the VOIP communication you might be aware that is different from the #Traditional Telephony network. In this era passes over the IP based telephony network establishment over the routers, hubs, and switches to peer up with the Server and Client session for the establishment of the communication.

Are you afrid of reading long content? Here is a Audio Clip with Glips of Audio and Video Codecs to choose from the Voip Experts. We recommend you to listen if you bored to read.

Do you aware of Linphone?

Linphone, also known as Linux phone, is a softphone or internet phone used for making free calls over the internet. It allows us to communicate freely with voice, video, and text messaging over the internet. Linphone is officially developed by the European Company called Belledonne Communications based in France.

What Platforms does Linphone Support?

Originally the intention of the Linphone development was for the Linux operating system, but as technology is emerging and Linphone started getting popularity day to day, Linphone development expanded its radar and has become compatible with big operating systems like Mac OS X and Microsoft Windows.

Don’t you think I missed something? Yes! Of course, the Linphone itself emerged with an intention of growing mobile connectivity as easy to use technology for making calls.

With time people’s interests shifted from the computer to the mobile environment, the top computer operating system solution providers started developing the mobile operating systems. In the same way, the real-time voice and video tech providers are started concentrating on developing a transporter to fulfill the need of smart computers to the smart mobiles phones.

The Linphone mobile app development came behind the show with Network address translator (NAT) to give a presence, support to the telephony i.e., the Internet telephony service provider (ITSP), which provides the capability to run the mobile video and audio transport as a console-mode application in between.

Does Linphone support the Android Dialer Apps development?

As of now the Linphone teams working with a core heart and support to run the Linphone Android app environment. Up to now, the Google releases various versions of Android operating system whereas Linphone team did customization to the code to support all the operating system versions like Oreo, Nought, Marshmallow, Lollipop, KitKat, Jelly Bean, Ice Cream Sandwich, and Honeycomb. i.e., 3.2.5 to 8.1

Currently, the Linphone team is working for the next beta update of the Android newer version Android P to support the latest features.

Does Linphone support the iOS Dialer Apps development?

Linphone supports continues with all the possible apples operating system version for the Linphone iOS applications from 8.0 to 12.0.0 currently with a clear documentary to help developers while customizing the Linphone applications.

Is Linphone licensed?

Yes, Linphone comes as a widely used free software license named as the GNU – General Public License (GNU GPL or GPL), which guarantee the end users the freedom to study, run, share, and customize the software as per the requirement.

What are the best suits available for Linphone?

As we all aware of the Internet Engineering Task Force (IETF), which deals with the long-anticipated crisis of IPv4 address exhaustion, Linphone rolled out with an updated support by IPV6 Protocol (Internet Protocol version 6) provided with hierarchical address allocation methods, brilliant multicast  addressing up to 4.3 billion, device mobility, security, configuration optimization for the delivery of services and more. On the other hand, several IPv6 evolution mechanisms have been devised to allow communication among IPv4 and IPv6 hosts.

You must also need to notice the following!!

Linphone capable of writing programs without the GUI can be developed, using such command-line tools and the consoles for servers.

    • An object-oriented widget toolkit is written in C programming language, officially this is a library that contains a set of graphical control elements (widgets) named as GTK (GIMP Toolkit) which is a cross-platform widget toolkit to create the graphical user interface. The stunning key point is here, where we can work through HTML5 at back-end called as Broadway.
  • GtkBuilder – interface allow us to load at runtime and the object created automatically where the code is described in Extensible Markup Language (XML) file.
  • Wayland protocol for a computer – it specifies a communication among the display server (called as Wayland compositor). The aspiration of replacing X- Window System with simpler, modern, windowing scheme in the Linux and further Unix-like OS.
  • The x11 – X Window System core protocol, is a networked windowing scheme/system for the bitmap displays, used to build the graphical user interfaces on a Unix, Unix-like, and other Operating Systems. It has four kinds of packets to send asynchronously, over the network.
  1. Requests,
  2. Replies,
  3. Events, and
  4. Errors.
  • The most important part of any windowing system is the display server, which is used to communicate with clients so that communications can take place over a communication protocol. Usually, call as the display server protocol.
  • The Linphone accomplished to provide cross-platform application framework, i.e, for developing application software that can be able to run on different software and hardware platforms with small or no alternation in the original codebase. The beauty will be a native application with native capabilities including the speed.

Linphone SIP - VOIP call apps

We all are aware of the real-time transportation of audio and video over the IP network is an elite property to entertain the linphone. Under the RTP “Real-time Transport Protocol” Linphone deliver extensive communication that involves in the streaming media, such as telephony, teleconference video applications, television service and the features such as web-based push-to-talk.

RTP used at the time of conjunction well with the RTP Control Protocol (RTCP). RTP media streams technically overturned as foundations of Voice over IP – an idea often to use in conjunction with a signaling protocol such as Session Initiation Protocol (SIP), which establishes a connection across the network.

RTP allow data to transport to multiple destinations through IP multicast. It is regarded as the primary standard for audio/video transports in the IP networks.

As on move, a cryptographic key agreement protocol made-up to confer the keys for encryption among two endpoints. It is called as ZRTP: composed of Z – Real-time Transport Protocol, which also provides the next layer of authentications against the MitM attack based form of a key continuity.

All through the ZRTP intention is to configure the key for encryption between two endpoints, to provide a Real-time Transport to the Voice over Internet Protocol (VoIP) phone call based telephony services. i.e, by using Diffie–Hellman key exchange & the Secure Real-time Transport Protocol (SRTP) for the encryption, where the Datagram Transport Layer Security (DTLS) communication protocol runs the communications security for the datagram protocols. DTLS lets datagram-based applications to connect in a way that it is designed to prevent interfering, snooping, or message phony.

What are the Contents Used by the Linphone?

In the Linphone medium, the major vogue is to carry the digital data stream of encoded audio and video to provide the below functional abilities to the users.

  • Make audio & video calls in High Definition
  • Send prompt messages
  • Share pictures and files
  • Record and Save Record of calls
  • Do audio conferences
  • View real-time existence status
  • Manage your address book
  • Communicate securely

On the check, we can observe that Audio and Video will be the most powerful feature of Linphone. In the development of Linphone application, we use the following technologies to give 100% effectiveness to the Linphone customization services.

What is Audio Codec?

The audio codec is a computer program of application to implement an algorithm that encodes and decode digital audio data with respect to the given streaming media/audio file in audio coding format.

This audio codec can efficiently reduce the storage space and bandwidth essential for transmission of the stored audio file. Mostly the codecs are executed as per the libraries and server configuration of supportive players.

Setup SIP Companies

Top 3 + 1 Best Audio Codec available for VOIP communication?

Lihphone basically super support 4 type of audio codecs as per the Linphone customization point of view. The major key point in the codec execution and codec selection involves in the algorithm, bandwidth, Scalable nature, bit-rate compressions and the quality over the VOIP.

Check out a few audio codec here!!

  • G.729 Audio codec:

G.729 is an audio data compression algorithm for the voice that compresses digital voice in packets of 10 milliseconds extent. It is formally termed as Coding of Speech at 8 kbit/s using code-excited linear prediction speech coding (CS-ACELP).

G.729 provides support to the VoIP (IP telephony) including the IP phones, softphones, other VoIP handsets, IP PBXs, call center equipment, media servers/gateways, test equipment, voice recording equipment, and audio/video conferencing for enterprise business networks or for the corpus market (like PSTN emulation above xDSL or wireless access) and the voice messaging servers.

Note: G.729 is a purchasable Audio codec.

  • G722 Audio codec:

G.722 is 7 kHz Wideband audio codec with ITU-T standard operating at 48, 56 & 64 kbit/s. The next version of G.722 is G.722.1 called SIREN 7 defines a digital wideband coder algorithm which provides an audio bandwidth 50 Hz to 7 kHz, operating at the bit rate 24 kbps or 32 kbps.

The most recent codec of G722 version is G.722.2, also called as Adaptive Multirate Wideband (“AMR-WB”) is created on Algebraic code-excited linear prediction – ACELP offers even lower bit-rate compressions (6.6 kbit/s to 23.85 kbit/s)with an ability to quickly adapt to changing compressions as the network topography alters. In the case, bandwidth is automatically preserved when the network congestion is in height. When the congestion returns to normal level, a lower compression, the higher-quality bit rate is restored.

  • G.711 PCMU Audio codec

G.711 is also called as PCMU audio codec. The formal name is Pulse code modulation (PCM) of voice frequencies. Which is a very commonly used waveform of the codec, the primarily us of this codec is in the telephony.

G.711 is the narrowband audio codec that offers toll-quality audio at 64 kbit/s. G.711 passes the audio signals in the range of 300–3400 Hz and trials them at the rate of 8,000 samples/sec, with the tolerance on the rate of Fifty parts per million (ppm). Non-uniform (logarithmic) quantization with 8 bits is used to represent each of the samples, the result is 64 kbit/s bit rate.

  • G.711 PCMA Audio codec

This is an extension of PCM using G.711 with an algorithm is a normal companding algorithm, used in European 8-bit PCM digital infrastructures systems to optimize, i.e., adjust, the dynamic range of the analog signal for digitizing. It is one of two dissimilar versions of the G.711 – standard from ITU-T, the other version actuality the similar µ-law, used in North America and Japan.

Top 2 Video Codec available for Linphone?

Video codec is a software or electronic circuit that compresses/ decompresses digital video. Codec converts uncompressed (raw) digital video to the compressed format or vice versa.

In the context of the video compression, “codec” is the concatenation of “encoder” and “decoder” device that only compresses is classically called as an encoder, and the one only decompresses is called as a decoder.

Check out a few video codec here!!

  • H.264 Video Codec:

MPEG-4 Part 10 or H.264 or Advanced Video Coding (MPEG-4 AVC) is the block oriented motion-compensation-based video compression standard. As of 2014 update, this is one of the most frequently used arrangements for the compression, recording, and distribution of the video content.

H.264 was established by the ITU-T Video Coding Experts Group (VCEG) composed with the ISO/IEC JTC1 Moving Picture Experts Group (MPEG) with partnership effort is called as Joint Video Team (JVT).

The best one of this video encoding standards are for Blu-ray Discs; all Blu-ray Disc players need be able to decode H.264. This is also widely used by the streaming internet sources, such as videos from YouTube, Vimeo, and the iTunes Store. Even the web software like the Microsoft Silverlight, Adobe Flash Player and also numerous HDTV broadcasts over the globe (Advanced Television Systems Committee standards, DVB-T or DVB-T2, ISDB-T), cable (DVB-C), and satellite (DVB-S and DVB-S2).

Note: G.729 is a purchasable Video codec.

  • VP8 Video Codec:

 VP8 is the open and free video compression format owned by the Google and created by the On2 Technologies as successor to VP7.

The most interesting support from the Google over the VP8 is the following browsers Firefox, Opera, Chrome, and Chromium supports playing VP8 videos in HTML5 video tags. Internet Explorer also officially supports VP8 with the separate codec. According to the Google VP8 is mainly used in link with WebRTC and as formats for short looped animations, which is a replacement for the Graphics Interchange Format (GIF).

What are the Best suite of Audio and Video Codec for Linhpone – VoIP?

As per our experience over the Linphone, this would be given as per the clients need. According to the proven results, most of the clients are interested in going with the purchasable audio and video codecs like G.729 for the audio and H.264 for the video by expecting the good technical support on the go.


In 2018 up to a Q3 Finacial year, we have heard more than 100+ requirements to develop the Tunneling Concept for Linphone – VOIP Dailir App for the VOIP communication blocked countries. So we would like to tell you a few points about Linphone Tunneling.


The puzzle of Linphone Tunneling: 

The Tunneling is nothing but transferring the digital data from one particular network to the addressed destination over the internet. i.e., tunneling includes permitting private network communications to be engaged across the public network, such as the Internet, over a process named encapsulation.

ip tunneling

The encapsulation process permits for data packets to seem as from public network to a public network when they are on private data packets, which permits them with the unnoticed way to the public on the network.

In fact, research says the IP Tunneling concept is no more going to be work securely on the go.\

Who will Develop Softphone Apps or Can Customize the Linphone code to a dialer Apps?

At Krify, our Linphone app development team built the great competency to design, develop and deploy to the servers and the app store- play store according to the Android and iOS applications.

What do you need to have before the developing / customizing the Linphone app to your branding?

Linphone application with the own branding will enhance your business with flexible communication and the faster connections on the go within the IP network advances and efficiency.

What you (Linphone Client) require for app development?

You should have the following details with your to get your app developed very soon very fast within less than 10 working days depends on the feature you need.

  1. Sip identity:
  2. Username:
  3. Domain / Proxy:
  4. Password of Domain Proxy:
  5. Port Number:
  6. Proxy:

We just need these 6 things followed by the server configured as per Linphone Audio and Video Codecs.

Write us your requirement now…. @ info@krify.net for the Linphone mobile app developments.

Also, have a look on our Linphone app portfolio – Start joining in our happiest client list!! Thank you.