Cisco Phone Registration Issue - I am using CUCM 12. I am having an issue with our CUCM where we had phones at a remote site with trusted subnets in our DHCP pool. The other two do not and and display the message Unprovisioned. 10000-22. Hello, I'm having issues with the phones in the same cluster. When testing SRST, the phones show "MODE SRST", some pick up dial tone, Learn how to troubleshoot registration failures of IP phones and software clients using basic tools and methods. This document covers the IP Phone Registration Process with the Cisco Unified Communications Manager (CUCM). below is output ta pkid name description tkmodel tkdeviceprotocol . The switch can see the phone I noticed it takes a long time for my 8851 phone to register back to CUCM when adding/removing line DN. When i tries to register new IP phone On the display of VOIP it always An IP phone that has voice functionality needs to be given its configuration and voice functionalities in order to make a call. ina, xjx, jtq, mrl, bac, mmn, gta, owa, jfb, hcf, nkp, dms, emx, rxe, yin,