Tag: VOIP

Digital Rights Management (DRM)

DRM empowers content owners and distributors to successfully manage ad sales rights, produce accurate inventory forecasts, optimize for maximum revenue, deliver yield-optimized ads, and analyze video business performance. Why DRM Still Matters Piracy tooling now targets low-latency and browser-delivered streams, not just VOD assets. Modern stacks blend real-time WebRTC, near-real-time LL-HLS/DASH on QUIC, and traditional … Continue reading Digital Rights Management (DRM)

SIP Trunks

Traditional trunk call SIP trunk (older) systems Centralized SIP Trunk Model SIP trunking is an IP-based alternative to ISDN trunking services Planning to set up SIP trunk Features of SIP trunking Future of SIP trunks With the dawn of IP telephony service and cloud communication platforms in recent years, the SIP has caught the attention … Continue reading SIP Trunks

Certificates, compliances and Security in VoIP

This article describes various Certificates and compliances, Bill and Acts on data privacy, Security and prevention of Robocalls as adopted by countries around the world pertaining to Interconnected VoIP providers, telecommunications services, wireless telephone companies , HIPPa , SOX , GDPR , COPPA , CPNI , CCPA , PDP,SPIT ,Traced ACT , CRTC , Fcc E911

NLP ( Natural Language Processing ) in VoIP

NLP has great potential in cognitive and artificial intelligence , but also with increasing human to machine interaction and enhancement in Machine learning ,NLP is set to revolutionize the Voice over IP space.

Kamailio DNS and NAT

DNS sub-system in Kamailio DNS failoverDNS load balancingNAT ( Network Address Translation)NAT ( Network Address Translation)Why is NAT is important in SIP?Types of NAT solutionsNAT behavioursRTP NATFixing NATNAT Traversal ModuleWhy use keepalive when Registrations are already there for NATing ?How keepalives work for NATing ?function nat_keepalive()ParamsFunctionsclient_nat_test()fix_contact()nat_keepalive()Pseudo VariablesStatisticsNATHelper ModuleNAT pinging typesUDP packetSIP requestparamsfunctionsPseudo VariablesRPC Commands In … Continue reading Kamailio DNS and NAT

VoIP system DevOps, operations and Infrastructure management, Automation

operate and maintain a growing large scale VoIP Platform PCAP Collections CICD on Jenkins pipeline Configuration management using chef cookbooks virtualization and containerization using Docker Infrastructure management using terraform / Kubernetes Logs Analysis and Alarming

Opensips

Due to its very flexible and customisable routing engine it can be used in number of scenarios such as an SIP proxy or a router and due to its high throughput it is widely recommended as an enterprise grade inbound/outbound proxy server.

VOIP Call Metric Monitoring and MOS ( Mean Opinion Score)

Metrics for monitoring a VOIP call can be obtained from any node in media path of the call flow . Essentially used for analysis via calculation and aggregation , and sometimes used for realtime performance tracking and rectification too . Rating Factor (R-Factor) and Mean Opinion Score (MOS) are two commonly-used measurements of overall VoIP call quality. R-Factor: A value derived from metrics such as latency, jitter, and packet loss per ITU‑T Recommendation G.107. It assess the quality-of-experience for VoIP calls on your network. Typical scores range from 50 (bad) to 90 (excellent).

RTPengine on kamailio SIP server

RTPengine is a proxy for RTP traffic and other UDP based media traffic over either IPv4 or IPv6. It can even bridge between diff IP networks and interfaces . It can do TOS/QoS field setting. It is Multi-threaded , can advertise different addresses for operation behind NAT.

Telephony Solutions with Kamailio

Rich features set suiting to telephony domain that includes IMS extensions for VoLTE; ENUM; DID and least cost routing; load balancing; routing fail-over; Json and XMLRPC control interface, SNMP monitoring. To integrate with a carrier grade telecom network as SBC / gateway / inbound/outbound proxy , it can act as IPv4-IPv6 gateway , UDP/TCP/SCTP/WS translator and even had NAT and anti DOS attack support .

SIP/VOIP transformation towards IMS (Total IP)

Upgrading a softswitrch solutions to IMS Intelligent Networks( IN) Fixed/mobile convergence(FMC) with IMS Legacy to IP transformation WebRTC based Unified Communication platform Challenges in Migration to IMS  (Total IP ) The telecommunications industry has been going through a significant transformation over the past few years. At the outset incumbent operators used to focus on mainly basic … Continue reading SIP/VOIP transformation towards IMS (Total IP)

Kamailio Transaction management and Transaction Module tm

Kamailio is basically only a transaction stateful proxy, without any dialog support build in. Here the TM module enables stateful processing of SIP transactions. State is a requirement for many complex logic such as accounting, forking , DNS resolution

SIP VoIP system architecture basics

Infrastructure RequirementsIntegral Components of a VOIP SIP based architectureSIP GatewaysRegistrar ServerProxy ServerRedirect ServerApplication Server Adding Media ManagementDTMF( Dual tone Multi Frequency )TTS ( Text to Speech ) Developing SIP based applicationsBasic SIP methodsExtending SIP headersCall routing ScriptsSIP platform DevelopmentCollecting and Processing PCAPS NAT and DNS Near-end NAT traversal Far-end NAT traversalCDR Processing and BillingData Streams … Continue reading SIP VoIP system architecture basics

SIP ( Session Initiation Protocol )

SIP - Application layer protocolSIP RequestsSIP responsesSession Description Protocol  (SDP)SIP transactions, dialog , branchMatching in-dialog transactions/requestsRecord Routing strict routingloose routing Mobility and Location ServiceNetwork Address Translator ( NAT)Far End TraversalNear End TraversalSIP Call Flows RegisterationCall RedirectionForkingclick to Dial SIP for Instant Messaging and Presence Leveraging Extensions ( SIMPLE) Update : At the time of writing … Continue reading SIP ( Session Initiation Protocol )