Asterisk As Voip Gateway

Asterisk As VoIP Gateway

Description One of the most popular implementations of Asterisk is in the form of a VoIP gateway. It is frequently used in conjunction with Digium telephony interfacecards to connect legacy PBX systems with VoIP services or, conversely, to link IP PBX systems to legacy PSTN connections. Asterisk’s powerful multi-protocol call processing engine supports virtually everyPSTN and VoIP protocol and technology making it possible to connect at a fraction of the cost of traditional gateway systems. Supported Scenarios VoIP Services For Legacy PBX Systems
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LegacyPBX Gateway VoIP Service Legacy PBX Gateway VoIP Service Legacy PBX Gateway VoIP Service

PSTN Trunks For VoIP PBX Systems
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VoIP PBX Gateway PSTN VoIP PBX Gateway PSTN VoIP PBXGateway PSTN

Private Network / Toll Bypass
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Legacy PBX Gateway Gateway Legacy PBX Legacy PBX Gateway VoIP PBX

Features
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Linux operating system Asterisk telephonyengine Digium digital or analog interface card(s) Interface cable(s) to legacy system The computer can be any standard x86 (Intel or AMD)

Support for the most common protocols including: PSTNProtocols Analog T1/E1/J1 ISDN-PRI ISDN-BRI MFC/R2 SS7

IP Protocols SIP Skype IAX2 H.323
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computer. The system will need to include either PCI or PCI-Express expansion slots. The chassis must belarge enough to accommodate the interface cards. The system should be at least a Pentium IV or equivalent for a small gateway (up to 8 analog ports). Larger gateways and gateways that require transcoding(translation of the audio media from one format to another) will require more powerful hardware. The operating system can be virtually any modern 2.6-series distribution of Linux. Digium recommendsthe AsteriskNOW distribution, which comes with Asterisk and the interface card drivers pre-installed. Digium offers support subscriptions for systems running RedHat Enterprise Linux 4/5, CentOS Linux...