conaito VoIP SDK ActiveX
conaito VoIP SDK ActiveX for developers
conaito VoIP SDK ActiveX for developers
VOIP Technology Quick Guide
WLAN (Wi-Fi) Technology Quick Guide
T.38 Fax/Voice modem for SIP/H.323/ISDN CAPI
Orion VoIP Monitor
SIP SDK provides tools
.Net SDK for C# SIP WPF softphone development
Internet phone to make calls on your Mac OS X
A powerful and intuitive VoIP SIP SDK for iOS
VoIP SIP SDK for Android