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Are Lingo and Vonage H.323 or SIP?

Hi,

I want to build my own softphone and I want to use one of the cheap VOIP providers. If I want to use Vonage or Lingo should my software support SIP or H.323?

Thanks, John

Reply to
John
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I think they both use SIP.

-J.

Reply to
john

Thanks for your post!

Do you happen to know of an SDK for Java or C# that can talk SIP?

Thanks, John

Reply to
John

I just saw an announcement that gjtapi

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now has a SIP capability.

Mike

Reply to
Mike Blake-Knox

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