Question: When does an SGSN include the 'Homogenous Support of IMS Voice over PS Sessions' indication set to 'Supported' in an Update Location or Notify Request message to the HLR/HSS?
Option 1: Whenever any Routing Area (RA) within the serving SGSN supports IMS Voice over PS Sessions for a User Equipment (UE).
Option 2: Only if all RAs in the serving SGSN homogeneously support IMS Voice over PS Sessions for the UE.
Option 3: If at least one RA in the serving SGSN does not support IMS Voice over PS Sessions for the UE, to indicate an exception.
Option 4: This indication is never included in Update Location or Notify Request messages by the SGSN.
Explanation: The SGSN includes this indication set to 'Supported' only when all Routing Areas (RAs) in the serving SGSN uniformly support IMS Voice over PS Sessions for a User Equipment (UE), ensuring the HLR/HSS receives accurate homogeneous network capability information for service provisioning and management.