We have a voice PRI connected to an ISR 4451. The ISR is configured in CallManager using encryption/tls as a SIP Trunk (5061). We also have an IVR configured using SIP, but without encryption (5060).
When calling the IVR directly, the call proceeds. When calling a did on the PRI that translates to the IVR, it fails. I've tried fronting with a MTP to no avail. The call is completely G711. Any suggestions for troubleshooting?
