# Device takeover — MSBN view ## Process flow from the perspective of the MSB (MSBN) \nSystem diagram: Geräteübernahme — view of MSB\n\n\nCustomer backend system\n\nMACO APP · MSBN\n\nMarket partner\n\n\n\nProcess trigger received\n\nSTART_GERAETEUEBERNAH\nME\n\nAPI\n\nLoad data for processing\n\n\n2 read APIs called\n\nAPI\nlisted at the step\n\n1. Anforderung\nGeräteübernahmeangebot\n\n\nMSBA\n\nAS4\n35001\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n2.\nGeräteübernahme-angebot\n\n\nMSBA\n\nAS4\n15001\n\nAPERAK check: Z33\n\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\nLoad data for the check\n\n\nMesslokation lesen\n\nAPI\n\nLoad data for processing\n\n\n2 read APIs called\n\nAPI\nlisted at the step\n\nProcess trigger received\n\n\nSTART_BESTELLUNG_GERAE\nTEUEBERNAHME\n\nAPI\n\n3. Bestellung\n\n\nMSBA\n\nAS4\n17001\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\n4. Bestellbestätigung\n\n\nMSBA\n\nAS4\n19001, 19002\n\nAPERAK check: Z33\n\n\nUpdate transaction\n\n\nUpdate process data\n\nAPI\n\nLoad data for the check\n\n\nLESEN_ANGEBOT_BASIS\n\nAPI\n\nLoad data for processing\n\n\n2 read APIs called\n\nAPI\nlisted at the step\n"} gesamt={"\nSequence diagram: Geräteübernahme — view of MSB\n\n\nBackend (customer)\n\n\nMACO APP · MSBN\n\n\nMSBA\n\n\nSTART_GERAETEUEBERNAHME\nTrigger event\n\n1. Anforderung Geräteübernahmeangebot\nAS4 · PI 35001\n\nUpdate transaction\nUpdate process data\n\n2. Geräteübernahme-angebot\nAS4 · PI 15001\n\nUpdate transaction\nUpdate process data\n\nSTART_BESTELLUNG_GERAETEUEBERNAHME\nTrigger event\n\n3. Bestellung\nAS4 · PI 17001\n\nUpdate transaction\nUpdate process data\n\n4. Bestellbestätigung\nAS4 · PI 19001, 19002 · E_2011\n\nUpdate transaction\nUpdate process data\n"} titel="MSBN" /> ## Process steps ### Request device takeover quotation
**Check identifiers** - [35001](/en/schnittstellen/202604/pruefi/REQOTE/PI_35001) — Request for device takeover quotation · AS4
**Flow**
  1. **Prozessauslöser** [`START_GERAETEUEBERNAHME`](/en/api/202604/ausloeser-msb/start-geraeteuebernahme) \"\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"marktrolle\": \"\",\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"marktrolle\": \"\",\n \"rollencodenummer\": \"\"\n },\n \"gueltigAb\": \"\",\n \"kategorie\": \"\",\n \"sparte\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_GERAETEUEBERNAHME\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  2. **Load data for processing** - `LESEN_ANFRAGE_BASIS` - [Read metering location](/en/api/202604/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it
  3. Message to **MSBA** · AS4
  4. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Device takeover quotation
**Check identifiers** - [15001](/en/schnittstellen/202604/pruefi/QUOTES/PI_15001) — Quotation device takeover · AS4
**Flow**
  1. Message from **MSBA** · AS4
  2. **APERAK checks** - `15001` → `Z33`
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend with the data of the incoming message.
  4. **Load data for the check** - [Read metering location](/en/api/202604/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it
  5. **Load data for processing** - [Read metering location](/en/api/202604/backend-lesen/getmeterlocationbasic#messlokation-lesen) `GET /getMeterLocationBasic` Try it - [Read meter](/en/api/202604/backend-lesen/getcounterbasic#zahler-lesen) `GET /getCounterBasic` Try it
### Order placement
**Check identifiers** - [17001](/en/schnittstellen/202604/pruefi/ORDERS/PI_17001) — Order placement device takeover quotation · AS4
**Flow**
  1. **Prozessauslöser** [`START_BESTELLUNG_GERAETEUEBERNAHME`](/en/api/202604/ausloeser-msb/start-bestellung-geraeteuebernahme) \",\n \"positionsdaten\": [\n \"\"\n ]\n }\n ]\n },\n \"transaktionsdaten\": {\n \"absender\": {\n \"marktrolle\": \"\",\n \"rollencodenummer\": \"\"\n },\n \"empfaenger\": {\n \"marktrolle\": \"\",\n \"rollencodenummer\": \"\"\n },\n \"kategorie\": \"\",\n \"sparte\": \"\"\n },\n \"zusatzdaten\": {\n \"eventname\": \"START_BESTELLUNG_GERAETEUEBERNAHME\",\n \"prozessId\": \"\"\n }\n}"} security={[{"bearer": []}]}>Ausprobieren The backend triggers this step with this event.
  2. Message to **MSBA** · AS4
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend once the message has been created.
### Order confirmation
**Check identifiers** - [19001](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19001) — Confirmation of order placement · AS4 - [19002](/en/schnittstellen/202604/pruefi/ORDRSP/PI_19002) — Rejection of order placement · AS4
**Flow**
  1. Message from **MSBA** · AS4
    **Response per decision tree** - `19001`, `19002` → `E_2011`
  2. **APERAK checks** - `19001`, `19002` → `Z33`
  3. **Write endpoint** - Transaction updated — [Update process data](/en/api/202604/backend-schreiben-msb/updateprocessdata#prozessdaten-aktualiseren) `POST /updateProcessData` Try it out Updates the existing transaction in the backend with the data of the incoming message.
  4. **Load data for the check** - `LESEN_ANGEBOT_BASIS`
  5. **Load data for processing** - `LESEN_ANFRAGE_BASIS` - `LESEN_AUFTRAG_BASIS`
## Process information
  1. ### First message The party involved on this page sends this itself: “Request device takeover quotation” to **MSBA** (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 MSBA](/en/prozessdoku/202604/MSB--MSBA/awh-wim-gas-2-0-gerateubernahme) — the transferring MSB · market role MSB *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. ::: These read accesses are not listed in the API catalogue of this format version; the step therefore shows only their command, without address and without button. Applies to: [1](#schritt-1), [4](#schritt-4) For these decision trees of the process there is no source in this format version: - `E_2011`