Linphone is a free and open-source VoIP and SIP communication client that allows users to make voice and video calls, send instant messages, share files, and participate in group conversations over the internet.
Available for Windows, macOS, Linux, Android, and iOS, Linphone can be used with a Linphone account or a compatible SIP provider. It supports HD audio and video, SIP-based communication, encrypted connections, contact management, and remote account configuration.
Linphone is suitable for personal communication as well as business and professional VoIP deployments.
What's New
Recent Linphone releases focus on improving call quality, SIP compatibility, messaging, security, multimedia performance, and overall application stability.
Updates may also include improvements to remote account configuration, push notification integration, group communication, codecs, and network handling.
Linphone's associated Flexisip server ecosystem also provides account management and remote configuration tools for organizations deploying their own SIP services.
Key Features
HD Audio and Video Calls: Make high-quality voice and video calls over an internet connection.
Group Calling and Meetings: Participate in audio and video group conversations and meetings.
SIP Support: Linphone is built around the SIP protocol, supporting calling, presence, messaging, and account management through compatible SIP services.
Instant Messaging: Send text messages, participate in group chats, and communicate with contacts in real time.
File Sharing: Share files through supported conversations.
End-to-End Encryption: Supports secure communication technologies and encrypted media streams, including SRTP, ZRTP, and DTLS. Supported configurations may also provide additional end-to-end and post-quantum encryption capabilities.
Contact Management: Manage SIP contacts, presence information, and communication history from the application.
Push Notifications: Mobile versions can integrate with platform push notification systems to receive incoming call and message notifications.
Remote Configuration: Accounts can be provisioned and configured remotely using supported URLs, QR codes, or server-side configuration tools.
Adaptive Bitrate: Adjusts media transmission according to available network conditions to help maintain call quality.
Network Handover: Supports handling network changes during communication where supported by the platform and configuration.
IPv6 Support: Provides compatibility with IPv6 networks.
Multiple Codecs: Supports a range of audio and video codecs for different communication and network requirements.
Cross-Platform Support: The same communication platform is available across Windows, macOS, Linux, Android, and iOS.
User Interface
Linphone uses a clean communication-focused interface that provides quick access to contacts, conversations, calls, and account information.
The main interface includes a contact list and communication history, while individual conversations provide access to messaging, calling, video communication, and file sharing.
The configuration area provides more advanced controls for SIP accounts, network settings, audio devices, video devices, codecs, bandwidth limits, and security options.
Users can select microphones, speakers, and cameras, configure connection parameters, and adjust supported encryption and media settings according to their requirements.
Installation and Setup
Download the appropriate Linphone installer for Windows and run the setup program.
Follow the on-screen instructions to complete the installation. After launching Linphone, you can sign in with an existing Linphone account, create a new account where supported, or configure a compatible SIP account from another provider.
Once the account is configured, Linphone can connect to the SIP service and provide access to calling, messaging, contacts, and other supported communication features.
Advanced users and organizations can use remote provisioning and server-side configuration tools to simplify account deployment across multiple users.
How to Use
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Launch Linphone after installation.
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Sign in with an existing Linphone account or configure a compatible SIP account.
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Add contacts using their SIP addresses or available contact management tools.
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Select a contact to start a voice call, video call, or instant message conversation.
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Use group conversation features to communicate with multiple participants.
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Share files through supported conversations.
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Open the settings to configure microphones, speakers, webcams, codecs, bandwidth, and network options.
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Configure available encryption and security settings when required.
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Review call and message history from the main interface.
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Use remote configuration options when deploying Linphone in a business or managed environment.
FAQ
Is Linphone free?
Yes. Linphone is free and open-source software. The application itself can be used without purchasing a traditional software license, although calls and services provided by third-party SIP providers may have their own costs.
What is SIP?
SIP, or Session Initiation Protocol, is a standard communication protocol commonly used to establish and manage voice, video, and multimedia sessions over IP networks. Linphone uses SIP as the foundation for its communication features.
Can Linphone make video calls?
Yes. Linphone supports voice and video calls, including high-definition communication when the hardware, codecs, network, and remote endpoint support it.
Does Linphone support group calls?
Yes. Linphone supports group audio and video communication as well as group messaging.
Is Linphone secure?
Linphone provides multiple security mechanisms, including encrypted media and signaling options. Depending on the configuration, it supports technologies such as TLS, SRTP, ZRTP, and DTLS, along with more advanced end-to-end encryption capabilities.
Can I use my own SIP provider with Linphone?
Yes. Linphone can be configured to work with compatible SIP providers, allowing users to manage SIP communication without being restricted to a single service.
Does Linphone support Windows?
Yes. Linphone provides a Windows desktop application in addition to versions for macOS, Linux, Android, and iOS.
Can Linphone be used for business?
Yes. Its SIP-based architecture, remote configuration capabilities, and associated server-side tools make it suitable for business and managed VoIP deployments.
Does Linphone support file sharing?
Yes. Supported conversations can include file-sharing functionality in addition to text messaging and voice or video communication.
Alternatives
Zoiper: A cross-platform SIP softphone designed for voice and video communication with support for various SIP services.
Jitsi Meet: An open-source communication platform focused on video conferencing and online meetings.
Microsoft Teams: A collaboration platform combining messaging, meetings, voice communication, file sharing, and workplace collaboration tools.
Zoom: A popular video conferencing platform offering meetings, group calls, messaging, and collaboration features.
Pricing
Linphone is free and open-source software.
The application itself does not require a paid license for normal use. However, SIP accounts, telephone numbers, PSTN connectivity, hosting, or third-party VoIP services may involve separate charges depending on the provider.
System Requirements
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OS: Windows 10 or later
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Processor: Modern x86 or x64 processor
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RAM: 2 GB or more recommended
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Disk Space: Approximately 200 MB or more
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Internet Connection: Required for VoIP communication
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Microphone: Required for voice calls
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Webcam: Required for video calls
Exact requirements may vary depending on the Linphone version and enabled features.
Pros
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Free and open-source
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SIP-based communication
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Voice and video calling
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Group calls and meetings
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Instant messaging and file sharing
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Multiple encryption options
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Cross-platform support
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Supports third-party SIP providers
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Remote configuration capabilities
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Wide range of audio and video codecs
Cons
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SIP configuration can be complicated for beginners
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Advanced features may require technical knowledge
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Call quality depends heavily on the network and SIP provider
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Some business-oriented features require additional server-side infrastructure
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Availability of certain features can vary between platforms
Conclusion
Linphone is a versatile open-source VoIP client that combines SIP calling, HD voice and video communication, instant messaging, file sharing, group conversations, and multiple security options in a single application.
Its cross-platform support and compatibility with third-party SIP providers make it useful for both personal communication and professional VoIP deployments. While configuring advanced SIP and security features may require some technical knowledge, Linphone provides a flexible alternative to proprietary communication platforms for users who want greater control over their VoIP infrastructure.
