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Asterisk is free software that transforms a computer into a communication server. Asterisk lets you build applications like PBX, VoIP gateway, IVR and ACD.

3CX VOIP PBX - provides an easy to use, plug and play SIP - IP PABX for Windows. With a software based IP PBX you will save on PBX maintenance and halve your phone bill. Download the FREE edition today and break free from your proprietary phone syste...

Phone systems to power your business. Turnkey business phone systems, IP PBX phone systems, VoIP phone systems, and Asterisk telephony software.

Cisco (NASDAQ: CSCO) is the worldwide leader in networking that transforms how people connect, communicate and collaborate.

Get Business VoIP Phones, VoIP Phone Systems and other VoIP Equipment for your VoIP solution. VoIP Supply is North America’s leading supplier of VoIP equipment and hardware. Over 85,00 served since 2002.

VoIP Gateways with 4 to 96 FXS/FXO ports for IP PBX solutions and VoIP phone systems, buy full range VoIP Gateways from Real Tone to get professional technical support and service

Sangoma is a leading provider of hardware and software components that enable or enhance IP Communications Systems for both telecom and datacom applications.

Phone System, IPPBX, Call Center, IP PBX, Software PBX, Free VoIP Phone System, Unified Communication PBX, Skype Asterisk, Asterisk Skype, Skype Gateway, Skype Exchange, SIP to Skype, Skype to SIP, Skype Extension, Asterisk Hardware, Trixbox Hardware...

Business VoIP - OnSIP Hosted PBX and Hosted VoIP Trunking. No per user license fees makes our Hosted PBX service the most economical for your business.

Citel is a provider of unique Voice over Internet Protocol solutions. Citel