Where can I find a download of the JTAPI implementation? 
I am getting the following error: JSpeakerPhone.java:6: package javax.telephony does not exist import javax.telephony.*;
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                    1@89899.3K: optionally use this too, in case not found: http://www.javagalaxy.com/source/View.jsp?slno=0&tbl=1&category=JTAPI – Aug 02 '11 at 18:14
 
3 Answers
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            You have to find an implementation for whatever telephony solution you are using. JTAPI is just a specification much like JDBC, you need a specific driver for whatever solution you are using. There is a JTAPI implementation for ASTERIX for example.
Here is the reference implementation spec for JTAPI 1.4.
There is also gjtapi which might be useful for prototyping.
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        Look here. Even though it says "specification", you'll also find a link for the API itself:
http://www.oracle.com/technetwork/java/jtapi-136088.html
These might also be of interest:
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                    Google "java H.323" and it points you to an IBM Alphaworks link for their J323 Engine: http://www.alphaworks.ibm.com/tech/j323engine. I have no idea if it's still supported or not... – paulsm4 Aug 03 '11 at 00:44
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                    Also look here, regarding H.323 support under Java JMF: http://www.oracle.com/technetwork/java/javase/faq-jmf-137005.html#jmf2-steps – paulsm4 Aug 03 '11 at 00:49