A user has reported that keys that are pressed when accessing Cisco Unity Express are not being acknowledged by the system. This configuration is found on the voice-enabled IOS router:
dial-peer voice 6800 voip destination-pattern 5... session protocol sipv2 session target ipv4:10.3.6.127 codec g711ulaw no vad
What is the configuration command that is needed to complete the configuration and solve the problem?