IEEE DRAFT 1390 : D2 FEB 95

1. OVERVIEW
   1.1 Scope
   1.2 Purpose
2. REFERENCES
3. DEFINITIONS
4. UTILITY TELEMETRY SERVICE DESCRIPTION
   4.1 Feature Description
       4.1.1 Network Access Methods
          4.1.1.1 Central Office Service Unit Access
                   Method
          4.1.1.2 Direct Dial Access Method
       4.1.2 Call Initiation by Utility or ESP
          4.1.2.1 Using the Central Office Service
                   Unit Access Method
          4.1.2.2 Using the Direct Dail Access Method
       4.1.3 Call Initiated by the Telemetry Interface
              Unit
       4.1.4 Transmission Methods
          4.1.4.1 Off-Hook Transmission Method
          4.1.4.2. On-Hook Transmission Method
   4.2 Background and History
       4.2.1 Utility Initiated Calls-Outbound Meter
              Reading
          4.2.1.1 No Test Trunk Access Method
          4.2.1.2 Direct Dial Access Method
       4.2.2 Meter Interface Unit Initiated Calls -
              Inbound Meter Reading
          4.2.2.1 Central Office Service Unit Access
                   Method
          4.2.2.2 Direct Dial Access Method
5. UTILITY TELEMETRY SERVICE OPERATION & ARCHITECTURE
   5.1 Utility Telemetry Service Network Description
       5.1.1 Utility Access to/from the Telephone
              Network
       5.1.2 Network Access Method
          5.1.2.1 Central Office Service Unit Access Method
          5.1.2.2 Direct Dial Access Method
       5.1.3 TIU Transmission Method
          5.1.3.1 Off Hook Transmission Method
          5.1.3.2 On Hook Transmission Method
   5.2 Calls Initiated by the Utility of Enhanced
        Service Provider (Outbound TIU Off-Hook
        Transmission Method)
       5.2.1 Central Office Service Unit Access Method
              (Figure 6)
          5.2.1.1 Utility/ESP to Central Office Service
                  Unit Begin Session
          5.2.1.2 Utility Telemetry Call Connect & Data
                  Transfer
            5.2.1.2.1 End Users Line Not Busy
            5.2.1.2.2 End Users Line Busy of Not
                       Available
          5.2.1.3 Utility Telemetry Call Disconnect
            5.2.1.3.1 Disconnect Initiated by the
                       Utility Controller
            5.2.1.3.2 Disconnect Initiated by the
                       Telephone Network (Central Office
                       Service Unit or Switch)
            5.2.1.3.3 Disconnect Initiated by the End
                       User going Off-Hook
            5.2.1.3.4 Disconnect Initiated by the TIU
                       Going On-Hook
          5.2.1.4 Utility/ESP to Central Office Service
                  Unit End Session
        5.2.2 Direct Dial Access Method (Figure 7)
          5.2.2.1 Utility Telemetry Call Connect & Data
                  Transfer
            5.2.2.1.1 End Users Line Busy
            5.2.2.1.2 End Users Line Busy or Not
                      Available
          5.2.2.2 Utility Telemetry Call Disconnect
            5.2.2.2.1 Disconnect Initiated by the
                      Telephone Network (switch)
            5.2.2.2.2 Disconnect Initiated by the Utility
                      /ESP
            5.2.2.2.3 Disconnect Initiated by the End
                      User Going Off-Hook
            5.2.2.2.4 Disconnect Initiated by the TIU
                      Going On-Hook
 
   5.3 Calls Initiated by the Telemetry Interface Unit
        - (Inbound - TIU Off- Hook Transmission Method)
        5.3.1 Billing For Calls Initiated By The
               Telemetry Interface Unit
        5.3.2 Central Office Service Unit Access Method
               (Figure 8 & 9)
          5.3.2.1 Utility Telemetry Call Connect &
                     Data Transfer
            5.3.2.1.1 Utility or Enhanced Service
                      Providers Line Not Busy
            5.3.2.1.2 Utility or Enhanced Service
                      Providers Line or Telephone
                      Network (COSU) Busy
         5.3.2.2 Utility telemetry Call Disconnect
            5.3.2.2.1 Disconnect Initiated by the
                      Utility Controller/Enhanced
                      Service Provider
            5.3.2.2.2 Disconnect Initiated by the
                      Telephone Network (Central Office
                      Service Unit or Switch)
            5.3.2.2.3 Discount Initiated by the End User
                      going Off-Hook
            5.3.2.2.4 Disconnect Initiated by the
                      Telemetry Interface Unit Going On-
                      Hook
        5.3.3 Direct Dial Access Method (Figure 10)
         5.3.3.1 Utility Telemetry Call Connect & Data
                  Transfer
            5.3.3.1.1 Utility or Enhanced Service
                      Providers Line Not Busy
            5.3.3.1.2 Utility or Enhanced Service
                      Providers Line Busy
         5.3.3.2 Utility Telemetry Call Disconnect
            5.3.3.2.1 Disconnect Initiated by the Utility
                      or Enhanced Service Provider
            5.3.3.2.2 Disconnect Initiated by the
                      Telephone Network (Switch)
            5.3.3.2.3 Disconnect Initiated by the End
                      User going Off-Hook
            5.3.3.2.4 Disconnect Initiated by the
                      Telemetry Interface Unit
   5.4 Calls Initiated by the Utility or Enhanced
        Service Provider(Outbound- TIU On-Hook
        Transmission Method)
        5.4.1 Central Office Service Unit Access Method
               (Figure 11)
         5.4.1.1 Utility/ESP to Central Office Service
                  Unit Begin Session
         5.4.1.2 Utility Telemetry Call Connect & Data
                  Transfer
            5.4.1.2.1 End Users Line Not Busy
            5.4.1.2.2 End Users Line Busy or Not
                      Available
         5.4.1.3 Utility Telemetry Call Disconnect
            5.4.1.3.1 Disconnect Initiated by the
                      Utility Controller
            5.4.1.3.2 Disconnect Initiated by the
                      Telephone Network (Central Office
                      Service Unit or Switch)
            5.4.1.3.3 Disconnect Initiated by the End
                      User going Off-Hook
            5.4.1.3.4 Disconnect Initiated by the TIU
                      Going Inactive
         5.4.1.4 Utility/ESP to Central Office Service
                  Unit End Session