Symptom:
- Jabber devices will not register back with CUCM after an IP address change (or after some time of being idle) until reset manually from the CUCM device page.
- The Jabber devices will still show as "Registered" from the CUCM GUI even when they really aren't and can't place/receive calls.

Conditions:
- Running CUCM version 9.x or earlier. (Version 10.0 and above aren't affected as support for Session Persistency was added for Jabber devices)
- The "Time to Wait for Seamless Reconnect After TCP Drop or Roaming (seconds)" setting within the Common Phone Config and/or Enterprise Phone Config is not set to 0.