What counts as an emergency
The till takes no more orders, the ordering shop is unreachable, you cannot settle a sale or print a receipt. Everything else, like a question about the menu, a wish or an invoice, goes through the form on this page and is answered on working days.
What happens if nobody picks up
Within the hotline hours we answer; if somebody else is on the line, leave a message and we call back the same evening. Outside those hours we come back to you from 08:00 the next morning.
What your business does in the meantime
Keep working. An outage does not force you to close, but it has to be documented: note when it started and ended, write the receipts by hand and number them consecutively, and enter the transactions once the till is back. That is what § 146a AO expects: an outage that is recorded and traceable, not a gap. If only the fiscal module fails and not the till, you have nothing to do by hand at all: the transactions are queued and signed once the connection is back.