We have created a jack client which is similar to the simple client from your examples.

There is some audio from the client is being sent. 

The issue is  jack_ringbuffer_write function returns 0 but the ring buffer(all input parameters) which are sent are not 0.

Note:-Client is Asterisk(using attached app_jack.c).

Kindly help. 

Also Kindly tell us how to run jack in debug mode.

Thanks & Regards

Shashank