Create or expand your own VoIP application with Ozeki VoIP SIP SDK
Ozeki VoIP SIP SDK provides a flexible framework for real-time
VoIP calls for .Net developers to build or expand their own VoIP application or components.
It uses the power of .Net framework to its fullest advantage. In addition it ensures a faster time-to-market
and dramatically reduces your internal resource cost allocations.
Here are the main features that make Ozeki VoIP SIP SDK outstanding.
For more detailed comparison please check the comparison table.
It is a true .Net solution. Be aware of old technologies like ActiveX. Check the
SDK you choose because very often only a .Net wrapper is written for the ActiveX component to
use it from .Net. This method makes the whole SDK unstable. While the advantages of
real .Net solutions do not need to be mentioned. The key benefit of real .Net solutions
(and in this way of Ozeki VoIP SIP SDK) is that the whole SDK is written in .Net
that is why it is flexible for further developments, stable and reliable.
It includes good and detailed XML comments. In this way programmers always know
what the given method is responsible for. The detailed and good comments allow you
to avoid blackbox effect. Furthermore, efficient comments also improve support
It has detailed help file and documentation. Detailed help file and
documentation helps a lot when it comes to real work. Transparent documents will
guide you through the development process and speed up your work.
At last but certainly not least the Ozeki SIP SDK includes a demo application.
It's great because this demo application creates a total proper test environment for you
during your development.
That way you do not need to spend
money either time for creating the perfect environment just use this demo application!
With this demo you can even try the SDK features without writing a single code line.
How to connect to the telephone network for making calls?
To make voice calls you need to connect your system to the telephone network. This can be done in three ways:
Option #1: You can use a VoIP telephone adapter
A VoIP telephone adapter is a hardware device that can be connected to your ethernet LAN or to your computer.
It makes it possible to dial telephone calls. There are VoIP
telephone adapters for GSM lines, for standard analog telephone lines and for ISDN lines. (If you don't have a
VoIP telephone adapter, you can order one directly from us). When you put this hardware on your Ethernet LAN,
it will get an IP address. You need to configure this IP address in Ozeki VoIP SIP SDK to be able to make
voice telephone calls through the device.
Option #2: You can use a SIP Account provided by Internet based VoIP telephone provider
VoIP telephone service providers offer a telephone service over the Internet. They can forward calls to traditional
telephone networks and to Internet users signed up to their network. There are many VoIP telephone service providers
out there. When you sign up for their service, you will receive a SIP account (an IP address, a username and a password,
plus some other details). To make voice calls, you need to configure the SIP account details
in Ozeki VoIP SIP SDK.
Option #3: You can use your existing office PBX if it is a VoIP system
If your office has an IP telephone system, you can connect Ozeki VoIP SIP SDK to it through the office LAN. Ozeki VoIP SIP SDK
can log in with a SIP account to the PBX and it can make telephone calls just like any other office desktop phone would.
This is a good choice if you have already invested in IP telephony, because in this case you don't need to have a
dedicated telephone line for outbound voice telephone calls made with Ozeki VoIP SIP SDK.
How to decide which Ozeki VoIP SIP SDK license you need?
The licensing of Ozeki VoIP SIP SDK is based on the numbers of simultaneous calls can
be made. In this way, you can choose from various licenses according to your needs.
If you need only a few simultaneous calls, you can select a lower capacity SDK license.
While if you need large numbers of calls at the same time, you can choose a high capacity
When you purchase a license you can easily activate your demo application by
entering the serial number you received from Ozeki after purchase. You can enter
the serial number by opening the Ozeki VoIP SDK License Manager. In Registration
tab you can provide the serial number and click on Activate.