Howdy, Just purchased 10 x Cisco 4331 router with dual 4G LTE AT&T and Verizon NIM modules, and have modeled the configuration off other Cisco routers (2901 with first gen NIM modules) that have air cards installed.  I am having a pretty tough time ...

I am having an issue where one way audio is introduced immediately inbound to one of our DMVPN spokes. Audio is two way only from a 9971 to 9971 using g722, routing the exact same way as the affected phones -- 79XX. Note when a 794X calls inbound to ...