Call builder shows the path of a call as a graphic. At the top, you choose the main number. Below, you see where a call goes at what time.

On the left are the Bausteine (Blocks): extensions, ring groups, call queues, announcements, voicemail, direct numbers, plus times and operation.

1. Open Anrufbuilder (Call builder).
2. At the top, choose the main number. Without a main number, you cannot connect blocks.
3. Drag a block onto an anchor on the canvas. Alternatively, choose + (Add) or Mit Fluss verbinden (Connect to flow).
4. If a block is missing, create it with Neu… (New…).
5. Choose Nummer prüfen (Check number). The check finds branches without a destination, empty groups, and menus without an announcement.
6. Choose Änderungen prüfen (Check changes) and then Speichern (Save).

Only what you have checked is saved. Until then, everything stays a draft. Entwurf verwerfen (Discard draft) restores the previous state.

An auto attendant lets callers choose by key, for example "Sales, press 1".

1. Under Bausteine, choose the Ansagen (Announcements) item, then Neu… and Anrufer-Menü (Auto attendant). Alternatively, open Routing (Routing), Anrufermenü (Auto attendant), and Neues Anrufer-Menü (New auto attendant).
2. Set Name (Name) and Durchwahl (Direct number).
3. Assign a destination to each key. You can use 0 to 9 and *, at most 11 keys, with no duplicates.
4. Set what happens for Wenn niemand wählt (If no one selects).
5. Choose a Menü-Ansage (Menu announcement).
6. Choose Vorschau (Preview) and Anlegen (Create).

With Sonderzeit hinzufügen (Add special hours), you route calls in a recurring time window to another destination, see Business hours and exceptions.

Ablauf ansehen (View flow) shows the path as a readable list. This way, you check what a caller experiences before you save.

After every change, call the main number from outside. Also check menu keys and the path outside business hours.