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VISUAL Cpp .NET VOIP SOFTPHONE EXAMPLE
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Version
9.2.0
Ozeki VoIP SIP .Net SDK to develop Visual C++.Net
softphone to make & receive VoIP calls. The sample
program has basic telephony functions, handles DTMF
signals and customizable with further effective
functions & company logo or brand name. It delivers
crystal clear sound due to the extended codec support.
It has all the functions for establishing phone calls
like make/recieve call sending/receiving DTMF signals
to navigate in IVR systems and display call events on
GUI. Ozeki VoIP SIP SDK has been developed to ensure
excellent sound quality. For this purpose various
codecs are supported: G.711 aLaw/uLaw, G.729, iLBC,
GSM, G.722, SPEEX, SPEEX-WB. To make/receive VoIP phone
calls, the WPF softphone is compatible with almost all
PBX systems like Asterisk PBX, Cisco UCM, 3CX Phone
System, Kamailio PBX, etc. Ozeki SIP SDK also works
with almost all VoIP service providers (Skype Connect,
Gafachi, Callcentric, SureVoIP, VoIPtalk, etc.) due to
that it is fully standard compliant. Information can be
gathered about the phone line status with the PBX like
successful or unsuccessful registration, registered or
not registered. The source code can be downloaded
freely to use it or modify it. Due to the flexibility
of Ozeki SIP SDK, the developed softphone can be
further improved with features like: Jitter buffer,
Voice Activity Detection, Acoustic Echo Cancellation,
Packet Lost Concealment (PLC), Call timer, Customized
with Company Logo/Name, Unlimited User License, Full HD
video, Multiple lines for multiple concurrent calls,
Conferencing, Call history, Quick calling and re-
dialing, etc. The sample program handles one telephone
line but with Ozeki SIP SDK there is an opportunity for
developing and using multiple telephone lines
simultaneously. After an Ozeki SIP SDK .Net license has
been purchased you can feely use the license with your
product and may freely distribute your product in as
many copies as you want and no royalties or license
fees are needed to be paid for Ozeki
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