User's Manual

TR-151A page 44
 Return_Phone_Number: TR-151A will send confirmed message back to this Return_Phone_Number.
If user let Return_Phone_Number be empty, TR-151A will send report back to
SMSDefaultReturnPhoneNumber.
If Return_Phone_Number and SMSDefaultReturnPhoneNumber are both empty, TR-151A
will send report back to caller ID.
 ReturnPhoneNnumberForDefaultReportMode: Return phone number for default report mode. TR-151A will
send report to this number after it is turned on when Default Report Mode is set to immediate
report or period report.
 SMSDefaultReturnPhoneNumber: Set SMS Default Return Phone Number.