sip pbx

SIP Communicator - the Java VoIP and Instant Messaging client.

SIP Express Router (SER) is a high-performance, configurable

Net-SIP will implements all SIP protocol operation using EventMachine network.

Free Softphone for Windows. Works with any SIP/ VOIP provider and SIP PBX

TekSIP is a SIP Registrar and Stateless SIP Proxy for Windows.

TekSIP is a SIP Registrar and Stateless SIP Proxy for Windows.

FREE VoIP PBX: 3CX Phone system for Windows. No timeouts or limitations

This is a sample TAPI Driver which emulates a PBX.

Softphone for PC-telephony using TAPI, CAPI or SIP plus answering machine

Auto Dialer, VOIP Autodialer, Phone Dialer, SIP SKYPE PSTN PC to Phone Broadcast