The user information within the IE
Size
Maximum length of tag is 128 ASCII characters
Values
Any valid IA5 characters
Valid Attributes
USR_PROTOCOL (must be present)
Valid Usage
- Inbound call in SV542
- Outbound MakeCall in SV541, to send a user to user information element
in the setup message
- AnswerCall in SV541, to send a user to user information element in the
connect message
- TerminateCall, to send a user to user information element in the disconnect
message