Sip Ip Pbx

3CX Phone System for Windows Free
Free - 3CX Ltd

3CX Phone System for Windows Free edition is an IP PBX that completely replaces a proprietary PBX, supports standard SIP soft/hard phones, lowers call costs via VOIP service providers whilst still supporting traditional PSTN phone lines. Developed for Windows - Easy to install and configure! Scaleable to thousands of extensions & eliminates the phone wiring network. Download FREE edition with no limitations or time outs.

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Carousel Telephony Adapter
Free - NCH Software

Carousel is software to connect VoIP calls to ordinary telephone lines and vice versa using one of a number of professional telephony devices. It works as a virtual FXO gateway. You install it as a service on any Windows PC. SIP protocol VoIP calls will be directed out to standard PSTN analog lines through a telephony board.

windows, linux, attractel, calling, t 38, asterisk, telephony, asteriskguru, iax2, srtp, idefisk, iax and sip

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OfficeSIP Alerter
Free - OfficeSIP Communications

OfficeSIP Alerter is a simple, easy-to-use and free sip messenger. It was not designed for prolonged chat, it is handy when you need to send or receive single message. It is good replacement for old-fashioned Alerter Service. OfficeSIP Alerter has simple interface but it is based on Session Initiation Protocol, so you can exchange messages with users of Windows Messenger or other sip messenger.

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Axon Virtual PBx System
Free - NCH Software

Axon is a virtual PBX designed to manage calls within a business or call center environment. Any business can implement this scalable PBX solution with only an existing PC which connects to phone lines and extensions using VoIP technology.

ip com, broadvoice, azacall, x ten, yamaha, cisco, eyep, handytone, lets ring, spa300, voipuser, audiocodes

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