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WINDOWS FORMS SOFTPHONE IN .NET
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Version
9.2.0
Ozeki .Net VoIP SIP SDK for developing Windows Forms
softphone to make/receive multiple VoIP phone calls.
The Ozeki Windows Forms softphone sample 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/receive 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.). Tools: SIP protocol implementation, RTP
implementation, RTCP implementation, Audio device
support (mic, speaker), Audio encoding/decoding (audio
codecs), Voice quality improvement tools (AEC, AVG, NR,
Jitter buffer), Video device support (camera and
playback), Video encoding/decoding (video codecs),
Implemented network communication protocols: UDP, TCP
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