When this object is set to 'true', the Gateway will check the
upstream TPDU source address against the address
previously assigned to this user. If the addresses are
different, the TPDU is dropped, the notification
cgprsAccPtSecSrcViolNotif is generated and
cgprsAccPtSourceAddrViolTpdus is incremented. This
check will enable the Gateway to restrict the users with
fake identity.
When the object is set to 'false', no checking is
performed by the Gateway.