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 tutorial walks through the complete process of setting up the wvp‑GB28181 Pro platform—including environment preparation, front‑end compilation, back‑end packaging, configuration tweaks, and test execution—to enable GB28181‑compliant video streaming using SIP and ZLMediaKit.
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.
This guide explains how to use the high‑performance Workerman framework to create a UDP‑based asynchronous SIP server in PHP, covering protocol basics, business requirements, socket handling, multi‑process deployment, heartbeat management, and sample output.
This article details Meituan’s adoption of the Media Resource Control Protocol (MRCP) to standardize ASR and TTS integration, describing its architecture, key components, high‑availability deployment, and measured performance gains such as up to 55% latency reduction and a 15% increase in outbound call success rates.
This article details a lightweight intelligent monitoring platform built on the open‑source WVP framework, describing its modular architecture, edge‑computing workflow with KubeEdge, SIP registration process, real‑time streaming setup, core features, and technical innovations such as MongoDB adoption and flexible pod scheduling.
The article introduces a lightweight intelligent monitoring platform built on the open‑source WVP framework, detailing its components, SIP‑based video streaming architecture, edge‑computing integration, AI services, and performance optimizations such as MongoDB adoption.
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 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.
This article explains how an intelligent voice robot leverages TTS and SIP to convert server alerts into spoken notifications, detailing the end‑to‑end workflow, DTMF transmission methods, SIP detection techniques, SDP media negotiation, and RTP‑based DTMF parsing to enable reliable key‑press handling.
This article details the design and implementation of 58.com’s intelligent voice robot backend, covering its four‑layer architecture, SIP/SDP/RTP protocols, connection setup, multi‑turn voice interaction flow, DTMF handling, common troubleshooting issues, algorithm service modularization, SIP scheduling optimizations, and Java thread‑pool system tuning.
The article reviews the design and implementation of 58.com’s intelligent voice robot backend, detailing its four‑layer architecture, SIP/SDP/RTP protocols, multi‑round voice interaction flow, algorithm service modularization, SIP scheduling optimizations, and Java thread‑pool system tuning for high‑concurrency scenarios.
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 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 article introduces the GB28181 national video surveillance standard, explains its SIP‑based signaling architecture, details the SIP methods and message flows, describes the system components and hierarchical deployment, and outlines the registration and real‑time streaming processes required for implementation.
This article details the architecture and implementation of the voice call module of an intelligent voice robot, covering SIP signaling establishment, RTP session handling, audio encoding/decoding, sampling, and packetization to enable automated outbound calls and multi‑round voice interactions.
This article describes the background, architecture, signaling flow, client and server components, and code details of TEG's WRTC solution for real‑time audio/video calls and IP‑telephony, including WebRTC fundamentals, SIP integration, and DTMF support.
The article presents Ctrip's mobile call‑center solution, detailing its system architecture with SBC integration, the network challenges of mobile environments, the optimized SIP protocol, the custom CCodec audio codec with dynamic bitrate and low latency, and a real‑world deployment using PhoneSDK.
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.
