This object is used as one of the var-bind object when
notification for RSSI is generated. The relevant RSSI will be
copied into c3gNotifRssi which corresponds to the service
indicated in c3gNotifRadioService object. This object will
reflect the value of one of the following objects:
c3gCurrent1xRttRssi, c3gCurrentEvDoRssi and c3gCurrentGsmRssi.
User should not use this object to get the current RSSI value as
this object is used to indicate the RSSI value that triggers
c3gRssiOnsetNotif or c3gRssiAbateNotif notification.