out calls timeing out, long time for ext to ext calls to complete

Hi All,

We have a fresh installed 7.5.2.1 from the ISO on a VMware box for a couple of months now, we are testing it the last few weeks and here is what we have found.

We have everything set up but we are having the following issues.

1. When calling into the server I see the call connecting right away but does not ring
then I see this error 4 times
channel.c:1312 __ast_queue_frame: Exceptionally long voice queue length queuing to IAX2/
then the PBX hangs up and my phone thinks it is dialing.

2. Extension to Extension calls take forever to complete, about 20 seconds, when they connect everything sounds good

3. when dialout out to the IAX trunk it takes 15 seconds before it even shows in the CLI then it shows call progress only to fail with this error
__auto_congest: Auto-congesting call due to slow response

4. Getting these errors in the CLI every so often
[2016-08-29 22:15:14] ERROR[31546]: utils.c:1446 ast_careful_fwrite: fwrite() returned error: Connection reset by peer
[2016-08-29 22:15:14] ERROR[31546]: utils.c:1446 ast_careful_fwrite: fwrite() returned error: Broken pipe

5. Plackup gets high CPU when calling ext to ext or out bound calls, I kill the process and nothing changes.

I have done some searching with no good results I am hoping it is something dumb like a timing issue

Any ideals?

thanks again
Keith