Performance call testing

Hi all,
I want do stress test of recording application runing above CUCM.  I want to simulate so much parallel calls as possible with some software. And this is my question.
Which software is now possible to get free or paid which can:
- originate and terminate calls automatically
     - send some sample stream to that calls (like A.wav for phone A, and B.wav for phone B)
- support SPAN less recording device
- can be defined how much parallel calls will be done during test
In past Cisco had application called SimClient, but now it's not developed anymore. It was great application but not working as needed now. Is there some replacement?
Thanks

Hmm. Yes and no. Yes it will invoke system calls (most binaries invoke system calls all the time, and the JVM is no exception), but no, I wouldn't see any reason for reflection to be particularly bad in this respect.
Native methods, well, maybe. Depends what the ones in question are doing. But again, normal use of the Java implies quite a lot of JNI usage because key classes such as Object use JNI to get certain jobs done.
Dave.

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