All subsequent calls being sent to voicemail.

Ok, so I have a serious problem going on now.
It seems that whenever a call is picked up by a certain extension (5003) all subsequent calls are sent to voicemail.
Also, some type of "Freeze up" in the phone causes the all calls on that DID to go to voicemail and no outgoing calls allowed. Any clue what could cause that much damage?

Here is a part of the log. I think this may be related to the
"Loop Detected" and the Everyone is busy/congested at this time (1:0/0/1)

Anyone have a clue? Thanks!

Jun 20 18:12:18 VERBOSE[32699] logger.c: -- Called memo-3
Jun 20 18:12:18 VERBOSE[16358] logger.c: -- Got SIP response 482 "Loop Detected"
Jun 20 18:12:18 VERBOSE[32699] logger.c: -- Now forwarding SIP/memo-5003-9290 to 'Local/@from-pstn' (thanks to SIP/memo-3-8937)
Jun 20 18:12:18 NOTICE[32699] chan_local.c: No such extension/context @from-pstn creating local channel
Jun 20 18:12:18 NOTICE[32699] app_dial.c: Unable to create local channel for call forward to 'Local/@from-pstn' (cause = 0)
Jun 20 18:12:18 VERBOSE[32699] chan_sip.c: Hangup call SIP/memo-3-8937, SIP callid 3aab3e6a45e8f28a7feba119357d551e@64.118.93.76
Jun 20 18:12:18 VERBOSE[32699] logger.c: == Everyone is busy/congested at this time (1:0/0/1)
Jun 20 18:12:18 VERBOSE[32699] chan_sip.c: Hangup call SIP/memo-5003-9290, SIP callid cd826485-a9de68d3-d0ec7a00@192.168.0.101

This is indeed a serious issue, which might take some time to investigate. What kind of SIP User Agents are you using for your Extensions?

Hi. I am using Polycom Soundpoint IP500's .
So, I was going through settings and think I cleared up the loop issue. It seems to have left when I changed the "dial" settings on a few extensions. They were some changes I had made in an attempt to get the shared line working. (Never Worked)

But, I am still having the problem of the freeze up. So, I am getting the Phone brought in to test it here at home and possibly switch it out. I can't seem to find a difference in the setup at that location from here. I even went as far as putting the phone in a DMZ. Nothing....

Would love any ideas.

Ok, so looking at the logs, it looks like I did clear up the loop issue. Thank you.

So, I still need to figure out the freezing.
Does anyone know if there would be issues concerning the ports seeing as they also have a "Vonage Box" on their network there?
Thanks.

Very important port number considerations

Mixing and matching SIP User Agents on the same LAN requires very careful provisioning of the ports used for signaling (SIP) and media (RTP).

The signaling port needs to be unique for every SIP UA on the same LAN, otherwise all kinds of weird behavior is to be expected. The media port range should also be carefully selected, since some devices use a single port for RTP while others use a port range.