This article provides a comprehensive technical overview of SIP signaling, SDP negotiation, RTP/RTCP media transport, and the Binary Floor Control Protocol (BFCP), including their interactions, message flows, deployment models, and practical screen‑sharing implementations for video‑conference systems.
This article introduces the SIP (Session Initiation Protocol) as the flexible signaling backbone for 5G voice and video services, explains its place in the OSI model, details message structure and common methods, outlines real‑world use cases, and provides step‑by‑step setup and code examples using eXosip and pjsip.
This comprehensive tutorial walks you through installing, configuring, and extending FreeSWITCH to create a cloud‑based call center, covering SIP fundamentals, media handling options, Windows setup, client configuration, and EventSocket integration for advanced development.
Learn how to build a robust iOS VoIP application by integrating PushKit for VoIP push notifications, CallKit for native call UI, CTCarrier for carrier detection, and essential audio‑video SDK setup, complete with configuration steps, code samples, and best‑practice guidelines.
This article explains how the smart outbound calling platform was conceived, compares VoIP platforms, introduces Freeswitch architecture and development modes, details SIP call flows and configuration, and describes the progressive evolution from a single‑instance deployment to a load‑balanced, hub‑and‑spoke architecture for high‑concurrency, multi‑tenant call‑center services.
This article reviews ByteDance’s intelligent audio signal processing technologies, covering foundational algorithms, multimodal audio scaling, sound‑field reconstruction, and high‑quality low‑latency VoIP, and explains how these advances improve audio capture, immersive media, and smart voice interaction across devices.
This article traces the historical development from early wired telephones to modern mobile and internet voice services, then details the architecture, features, SIP protocol handling, and Java‑FreeSWITCH integration of the YTalk call platform used for outbound and inbound communications.
Learn how to construct a scalable, high‑availability cloud call‑center platform using FreeSWITCH, covering PBX basics, dial‑plan routing, media handling, clustering with fs‑router and fs‑media, integration of Kamailio for signaling, and strategies for multi‑tenant, high‑concurrency deployments.
This article explains why VoIP calls suffer from brief interruptions caused by packet loss, compares traditional forward error correction (FEC) and packet loss concealment (PLC) techniques, introduces Tencent's deep‑learning‑enhanced cPLC, and shows how it significantly improves MOS scores, especially under burst‑loss conditions.
Shang Shidong outlines Tencent Meeting’s shift from analog PSTN to IP‑based VoIP, using H.323, SIP, RTP/UDP and the Opus codec, while AI‑driven super‑resolution, deep‑learning packet‑loss concealment, advanced noise reduction, and speech‑music classification boost audio quality, complemented by reference‑free MOS assessment and future 5G‑enabled cloud, IoT and WebRTC integration.
This article provides a comprehensive overview of the Session Initiation Protocol (SIP), covering its role in multimedia session signaling, stack placement, core network entities, message formats, transaction handling, related RFCs, and a brief comparison of popular open‑source SIP stacks.
This guide walks through building a complete iOS VoIP solution using CallKit and PushKit, covering UI differences, step‑by‑step configuration of CXProvider and PKPushRegistry, handling incoming calls, common pitfalls such as lock‑screen crashes and token issues, and extending functionality with Call Directory extensions.
This article introduces Session Border Controllers (SBC), outlines three typical deployment scenarios, and shares detailed practical experiences—including architecture, implementation steps, and common pitfalls—of building software‑based SBC solutions such as VAG, VIG, and VTG for VoIP services.
This article presents a comprehensive guide on building a VOIP service for overseas users, covering VOIP fundamentals, open‑source PBX selection, SIP client libraries, demo deployment, load‑balancing with Kamailio, high‑availability via Keepalived, NAT handling, TLS/SRTP support, and troubleshooting techniques.
This article walks through the fundamentals of iOS 10 CallKit, explains its three‑module architecture, details the four main call‑handling flows, shares practical integration tips for QQ VoIP, and addresses common pitfalls like silent‑audio issues and version compatibility.
