Asterisk is a complete PBX and telephony toolkit in software. It runs on Linux, *BSD, MacOSX, and Solaris. It provides all of the features you would expect from a PBX and more as it enables developers to build customized voice applications of many types. Asterisk does voice over IP in many
... [More] protocols, and can interoperate with almost all standards-based telephony equipment using relatively inexpensive hardware. [Less]
Kazoo is a scalable, distributed, cloud-based telephony platform that allows you to build powerful telephony applications with a rich set of APIs.
Designed to handle anything from large carrier to small countries, the Whistle infrastructure can do it all. There are no lock-ins and the software is
... [More] open-source to give you complete freedom.
Services include:
- Complete redundancy and failover between data centers
- Complete replication of all data
- Use of Map/Reduce algorithms inside NoSQL databases
- Multi-master replication and caching of registrations, active channels and call lookups
- Load balancing built-in
- Event driven messaging for managing and using calls
- A complete REST interface for implementing call flow features [Less]
blue.box is an open-source configuration and management software enabling the use of the FreeSWITCH and Asterisk switching libraries. It supports multi-tenancy, skinning and is completely open-source. It can be used with database and file replication to scale up to thousands of registered devices
... [More] and simultaneous phone calls. It can operate in the cloud or on the premise.
blue.box development is hosted and funded by the 2600hz project. http://www.2600hz.org [Less]
Yet Another Telephony Engine is a next-generation telephony engine; while currently focused on Voice over Internet Protocol (VoIP) and PSTN, its power lies in its ability to be easily extended. Voice, video, data and instant messaging can all be unified under Yate's flexible routing engine
... [More], maximizing communications efficiency and minimizing infrastructure costs for businesses. [Less]
A2Billing complements the Asterisk project by enabling the following features on both TDM and VoIP calls:
Traditional calling card services
Credit limit on both pre-paid and post-paid customers
Callback services
Residential VoIP services
Wholesale minutes termination
Monthly/weekly free
... [More] calling packages
Invoicing
Paypal, Moneybookers and Authorize.net integration.
The project is easy to use and is frequently seen on FreePBX installations to bring accountability to small offices' phone usage.
For ITSP and traditional telco wholesale usage it has been seen to easily scale to millions of minutes per month, with 100,000s rates across many trunks. Work is in progress to further enhance A2Billing's scalability and availability. [Less]
Elastix is an appliance software that integrates the best tools available for Asterisk-based PBXs into a easy-to-use interface. It also adds its own set of utilities to make it the best software package available for open source telephony.
The GNU Gatekeeper (GnuGk) is a full featured H.323 gatekeeper under GPL license. It supports VoIP and videoconferencing and includes Radius and database support and many call routing functions.
What is t38modem? From your application view point it's a fax/voice modem pool. From IP network view point it's a H.323/SIP endpoint with T.38 fax support. From your view point it's a gateway between an application and IP network. Works with HylaFAX.
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