Kamailio
Kamailio® (successor of former OpenSER and SER) is an open-source SIP server released under GPLv2+, able to handle thousands of call setups per second. Kamailio can be used to build large platforms for VoIP and real-time communications, presence, WebRTC, Instant messaging, and other applications. Moreover, it can be easily used for scaling up SIP-to-PSTN gateways, PBX systems, or media servers like Asterisk™, FreeSWITCH™, or SEMS. Among the powerful features, are asynchronous TCP, UDP and SCTP, secure communication via TLS for VoIP (voice, video, text); WebSocket support for WebRTC; IPv4 and IPv6; simple instant messaging and presence with embedded XCAP server and MSRP relay; asynchronous operations; IMS extensions for VoLTE; ENUM; DID and least cost routing; load balancing; routing fail-over; accounting, authentication and authorization; support for many backend systems such as MySQL, Postgres, Oracle, Radius, LDAP, Redis, Cassandra, MongoDB, Memcached.
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TekIVR
TekIVR is a SIP (Based on RFC 3261) Interactive Voice System (IVR) for Windows. TekIVR is tested on Microsoft Windows Vista, Windows 7/8/10/11 and Windows 2008-2022 server. TekIVR has a simple easy to use user interface. You can create your own IVR scenario using built-in scenario editor. You can select your own audio files to be used in IVR scenario. TekIVR can also read-out texts using TTS (Text-to-Speech) engine and recognize user input via speech recognition. You can use Speech Synthesis Markup Language (SSML) while defining prompts. TekIVR supports SAPI, Google Cloud Speech API, Azure Cognitive Services and MRCPv2 for TTS and ASR functions. It supports ITU G.711 A-Mu Law and G.722 codecs and UPnP for NAT traversal. TekIVR can act as Proxy between MRCP v2 based application servers and SAPI, Azure and Google Speech based speech engines. TekIVR allows MRCP v2 based application servers to use SAPI, Azure and Google Speech based TTS and ASR services.
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Amazon API Gateway
Amazon API Gateway is a fully managed service that makes it easy for developers to create, publish, maintain, monitor, and secure APIs at any scale. APIs act as the "front door" for applications to access data, business logic, or functionality from your backend services. Using API Gateway, you can create RESTful APIs and WebSocket APIs that enable real-time two-way communication applications. API Gateway supports containerized and serverless workloads, as well as web applications. API Gateway handles all the tasks involved in accepting and processing up to hundreds of thousands of concurrent API calls, including traffic management, CORS support, authorization and access control, throttling, monitoring, and API version management. API Gateway has no minimum fees or startup costs. You pay for the API calls you receive and the amount of data transferred out and, with the API Gateway tiered pricing model, you can reduce your cost as your API usage scales.
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Azure Virtual Desktop
Azure Virtual Desktop (formerly Windows Virtual Desktop) is a comprehensive desktop and app virtualization service running in the cloud. It’s the only virtual desktop infrastructure (VDI) that delivers simplified management, multi-session Windows 10, optimizations for Microsoft 365 Apps for enterprise, and support for Remote Desktop Services (RDS) environments. Deploy and scale your Windows desktops and apps on Azure in minutes, and get built-in security and compliance features. Bring your own device (BYOD) and access your desktop and applications over the internet using an Azure Virtual Desktop client such as Windows, Mac, iOS, Android, or HTML5. Choose the right Azure virtual machine (VM) to optimize performance and leverage the Windows 10 and Windows 11 multi-session advantage on Azure to run multiple concurrent user sessions and save costs.
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