VOIP service with an API that can be resold? [closed]

Closed. This question is off-topic. It is not currently accepting answers.

---

开发者_开发知识库

Want to improve this question? Update the question so it's on-topic for Stack Overflow.

Closed 10 years ago.

Improve this question

Looking to add dialing capabilities to my desktop application. Requires:

1. API/SDK to allow seamless integration into C#. An application user would have no idea who the VOIP provider is.
2. Allows re-sale in license. We include it as part of the package and charge our end users

Any packages out there that fit this bill?

---

Look at this Ozeki VoIP SDK. It is based on C#.

---

If you're looking to wrap up full softphone capabilities the main ones I'm aware are NCH's Express Talk and pjsip. I've never attempted to integrate with either so don't know how easy or hard it will be with C#. If you only need your application to be able to intiate and/or control calls you could use any SIP stack, an open source C# one being sipsorcery.

---

2600hz does this (and it's open-source).

Git repo here: https://github.com/2600hz/kazoo

Main site here: http://2600hz.com

I think this is what you're looking for although we don't have a softphone built-in (but integrate with most existing softphone clients).

Cheers, Joshua

Disclaimer: I'm the community manager for 2600hz.