This article is about Digium, Inc., the American developer of IP PBX hardware and software. For the Finnish research systems company, see Digium Ltd.

Digium, Inc. is a company based in Huntsville, Alabama which specializes in the development of PBX hardware and open-source telephony software. The company is the primary developer and sponsor of Asterisk™, The Open Source PBX. In addition, Digium develops PBX hardware and provides contract support and development services for Asterisk. Image File history File links Digium. ... Digium Ltd specialises in producing and developing Internet-based research systems and related research services. ... To meet Wikipedias quality standards, this article or section may require cleanup. ... Asterisk is a free software / open-source software implementation of a telephone private branch exchange (PBX). ... Open source refers to projects that are open to the public and which draw on other projects that are freely available to the general public. ... PBX redirects here. ...

History

Digium was founded by Mark Spencer as Linux Support Services in 1999. The original goal of the company was to provide contract support and development for Linux. Because Mark did not have the resources to purchase a PBX for his new company, he decided to begin writing one from scratch. Mark Spencer (born April 8, 1977) is a computer engineer and is the original author of the GTK+-based instant messaging client Gaim and the L2TP daemon l2tpd. ... Linux (also known as GNU/Linux) is a Unix-like computer operating system. ...

In 2001, the U.S. economy entered a period of recession, and demand for the company's services dried up. Mark decided to shift the company's focus to its fledgling open-source PBX product, Asterisk. The company was renamed "Digium" and incorporated as such in 2002. Asterisk is a free software / open-source software implementation of a telephone private branch exchange (PBX). ...

Today, Digium is expanding rapidly and employs over fifty people.

Products and Services

Software

• Asterisk, Digium's most well-known product, is an open-source PBX application which runs on commodity PC hardware.
• Asterisk Business Edition is a highly-tested version of Asterisk sold and distributed under a more traditional commercial license.
• Digium also negotiates OEM licenses for those wishing to integrate Asterisk into commercial products.

Asterisk is a free software / open-source software implementation of a telephone private branch exchange (PBX). ...

Hardware

• TDM400P, a PCI card which interfaces with up to four analog telephone lines or analog telephone sets.
• TDM2400P, a PCI card which interfaces with up to twenty-four analog telephone lines or analog telephone sets.
• TE110P, a single-span T1 PCI interface card
• TE205P/TE210P, dual-span T1 PCI interface cards
• TE207P/TE212P, dual-span T1 PCI interface cards with hardware echo cancellation
• TE405P/TE410P, quad-span T1 PCI interface cards
• TE407P/TE412P, quad-span T1 PCI interface cards with hardware echo cancellation
• S101i, affectionately called IAXy, is an Analog Telephony Adapter which speaks Asterisk's native IAX2 protocol.

The term echo cancellation is used in telephony to describe the process of removing echo from a voice communication in order to improve voice quality on a telephone call. ... The term echo cancellation is used in telephony to describe the process of removing echo from a voice communication in order to improve voice quality on a telephone call. ... The IAXy, a VoIP telephone adaptor that uses the IAX2 protocol. ... An Analog Telephony Adapter, or ATA, is a device used to connect one or more standard analog telephones to a Voice over IP based network. ... IAX is the Inter-Asterisk eXchange protocol used by Asterisk, an open source PBX server from Digium. ...

Announced Products

• B410P, a PCI card which interfaces with up to four ISDN BRI lines.
• TC400P, a hardware transcoder card expected to handle 120 channels of G.729a or G.723.1 audio.

ISDN is also short for isosorbide dinitrate Integrated Services Digital Network (ISDN) is a type of circuit switched telephone network system, designed to allow digital (as opposed to analog) transmission of voice and data over ordinary telephone copper wires, resulting in better quality and higher speeds, than available with analog... Basic rate interface (BRI, 2B+D, 2B1D) is an Integrated Services Digital Network configuration defined in the physical layer standard I.430 produced by the ITU. This configuration consists of two 64 kbit/s bearer channels (B channels) and one 16 kbit/s data channel (D channel). ... Transcoding is the direct digital-to-digital conversion from one (usually lossy) codec to another. ... G.729 is an audio data compression algorithm for voice that compresses voice audio in chunks of 10 milliseconds. ... G.723. ...

Services

Digium products include support services. The company provides free installation support for its hardware products; Asterisk Business Edition comes with a one-year support contract. In addition, the company offers a variety of paid support, configuration, and development packages for its hardware and software products.

External links

• http://www.digium.com/ - Digium, Inc
• http://www.voip-info.org/wiki/view/Digium/ - More info