Obscure any information that provides user identification, user-agent identification or personal details.
Examples of this information might be GSM CallerID, SIP from address, various informational email headers, etc. The CM should scrub/replace any of this information before passing messages or data onto the network. Note that a CM which has the option of obscuring the information at the CM or privacy service level would choose both (anonymity services are opaque to clients of this interface). Clients SHOULD NOT set both Client_Info and Show_Client_Info modes. If they are set, the CM MUST respect Client_Info and ignore Show_Client_Info.