Resolved Caveats - Cisco Release 12.4(11)XW6
CSCsk61275 no ring on 7941 phone while hunting second overlay number
Symptom The Cisco Unified IP Phone 7941 does not ring while hunting the second overlay number in Call Forward No Answer (CFNA) configuration.
Conditions Overlay button is configured on Cisco 7941, and CFNA is configured from the first number to the second number.
Workaround Use Cisco IOS Release 12.4(11)XJ3 or Cisco IOS Release 12.4(11)T3.