# Start of replacement supply / default supply — NB view ## Process flow from the perspective of the NB \nSystem diagram: Beginn der Ersatz- / Grundversorgung — view of NB\n\n\nCustomer backend system\n\nMACO APP · NB\n\nMarket partner\n\n\n\nProcess trigger received\n\nSTART_EOG\n\nAPI\n\n1. Anmeldung zur E/G\n\n\nLF (entspricht E/G)\n\nAS4\n44013\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n2. Antwort auf Anmeldung\nzur E/G\n\n\nLF (entspricht E/G)\n\nAS4\n44014, 44015\n\nAPERAK check: Z33\n\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n"} gesamt={"\nSequence diagram: Beginn der Ersatz- / Grundversorgung — view of NB\n\n\nBackend (customer)\n\n\nMACO APP · NB\n\n\nLF (entspricht E/G)\n\n\nSTART_EOG\nTrigger event\n\n1. Anmeldung zur E/G\nAS4 · PI 44013\n\nUpdate transaction\nUpdate process data\n\n2. Antwort auf Anmeldung zur E/G\nAS4 · PI 44014, 44015 · E_3008\nE_3008 — Anmeldung E/G prüfen\n\nUpdate transaction\nUpdate process data\n"} titel="NB" /> ## Process steps ### Registration for E/G
**Check identifiers** - [44013](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44013) — EoG registration · AS4
**Flow**
  1. **Prozessauslöser** [`START_EOG`](/en/api/202610/ausloeser-nb/start-eog) \"\n }\n ],\n \"MARKTLOKATION\": [\n {\n \"marktgebiet\": \"\",\n \"marktlokationsId\": \"\",\n \"netzebene\": \"\",\n \"sperrstatus\": \"\",\n \"zaehlwerke\": [\n \"\"\n ]\n }\n ],\n \"MESSLOKATION\": [\n {\n \"messlokationsId\": \"\"\n }\n ],\n \"NETZNUTZUNGSVERTRAG\": [\n {\n \"gemeinderabatt\": null,\n \"vertragskonditionen\": {\n \"haushaltskunde\": \"\",\n \"naechstenetznutzungsabrechnung\": \"\",\n \"netznutzungsabrechnung\": \"\",\n \"netznutzungsabrechnungIntervall\": \"\",\n \"netznutzungsabrechnungsvariante\": \"\",\n \"netznutzungsvertrag\": \"\",\n \"netznutzungszahler\": \"\"\n }\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"sparte\": \"\",\n \"transaktionsgrund\": \"\",\n \"transaktionsgrundergaenzung\": \"\",\n \"transaktionsgrundergaenzungBefristeteAnmeldung\": \"\",\n \"vertragsbeginn\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_EOG\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  2. Message to **LF (corresponds to E/G)** · AS4
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202610/backend-schreiben-nb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Response to registration for E/G
**Check identifiers** - [44014](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44014) — Confirmation of EoG registration · AS4 - [44015](/en/schnittstellen/202610/pruefi/UTILMD_GAS/PI_44015) — Rejection of EoG registration · AS4
**Flow**
  1. Message from **LF (corresponds to E/G)** · AS4
    **Response per decision tree** - `44014`, `44015` → [E_3008](/en/referenz/202610/ebd/E_3008) · Check registration E/G
  2. **APERAK checks** - `44014`, `44015` → `Z33`
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202610/backend-schreiben-nb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend with the data of the incoming message.
Decision trees of this process | EBD | Name | |---|---| | [E_3008](/referenz/202610/ebd/E_3008) | Check registration E/G |
## Process information
  1. ### Trigger **Runs beforehand:** [Billing data for grid usage settlement](/en/prozessdoku/202610/NB/GPKE-Teil2-abrechnungsdaten-netznutzungsabrechnung), [Start of supply](/en/prozessdoku/202610/NB/GPKE-Teil2-lieferbeginn), [End of supply from LF to NB](/en/prozessdoku/202610/NB/GPKE-Teil2-lieferende-von-lf-an-nb), [End of supply from NB to LF](/en/prozessdoku/202610/NB/GPKE-Teil2-lieferende-von-nb-an-lf), [Creation](/en/prozessdoku/202610/NB/GPKE-Teil2-neuanlage) — these processes name the one shown here in their result.
  2. ### First message The party involved on this page is itself the sender of: „Registration for E/G“ to **LF (corresponds to E/G)** (step 1).
## Other views of the process The same process through the eyes of the other parties involved: the same steps, each read from their point of view. - [View LF](/en/prozessdoku/202610/LF/geli-gas-2-0-beginn-der-ersatz-grundversorgung) — LF *The source provides no use case profile for this process — objective, precondition and result are not recorded there.* *The steps are the **possible** messages of this process, not a sequence — the source lists neither conditions nor alternatives. The small box on the step names the own view on the left: with **←** it receives, with **→** it sends. Collapsed steps run between other market partners.* :::caution{title="Step sequence reconstructed"} For this process, the BNetzA consolidated version carries no sequence diagram. The steps are reconstructed from the BDEW check identifier table: grouped by the designation, ordered by the process step. The method agrees with the consolidated version in 200 of 200 cases that can be cross-checked — the individual line is nevertheless not editorially reviewed. Check it against the rulebook before adopting it into an implementation specification. :::