HEATKEYS

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...

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

We provide the most innovative call center software to meet your needs. Our call center software includes an interactive contact center and advanced IP telephony products

Linphone, Free SIP VOIP client, open-source voip software for Linux, windows, mac, iphone, android. Free sip voip sdk.

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

SourceForge.net. Fast, secure and free downloads from the largest Open Source applications and software directory

Provider of emergency communication, mass notification and overhead paging to protect people and property.

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InPhonex is a VoIP Service Provider offering free phone calls, Pay as you go calling and Unlimited Monthly Plans. Save money on all of your calls with the VoIP Service Provider that offers low price and high quality VoIP Service.

Next generation solutions that deliver voice, data and video communication services for service providers, enterprises, and industry.

ShoreTel

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