To test whether Cisco Unity Connection and the phone system are integrated correctly, do the following procedures in the order listed.
If any of the steps indicate a failure, see the following documentation as applicable:
The installation guide for the phone system.
Troubleshooting Guide for Cisco Unity Connection, Release 12.x, available at https://www.cisco.com/c/en/us/td/docs/voice_ip_comm/connection/12x/troubleshooting/guide/b_12xcuctsg.html.
The setup information earlier in this guide.