Hello, I'm in the VoIP field, and I am having an issue deciphering why I am not able to complete a call to voicemail. I have 2 phone systems tied together via a PRI, and I have a PRI for trunking to the outside world. ShoreTel is the VoIP system, and its also acting at the voicemail system for both Phone systems. Other system is a Tadiran TDM system. What is happening is, if I call from the outside world via cell phone or desk phone, into the ShoreTel and it then transfer to a Tadiran phone via the Tie PRI trunks, it rings 4 times, and instead of being transferred to the Voicemail on the ShoreTel, the call just ends. I have packet capture from the ShoreTel PRI that plugs into the Carrier, and a capture from the other ShoreTel PRI that plugs into the Tadiran. I see a lot of ICMP Destination Unreachable (Port Unreachable) messages, along with what look to be some UDP error messages. The 2 ShoreTel switches are on the same subnet, so there isn't any routing between them. I was hoping someone would be able to look at my captures and help me figure out what is going on. This is for a big college, and they would really like their voicemail working. Thank you