> For the complete documentation index, see [llms.txt](https://help.sipgate.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sipgate.de/contact-center/en/klingel-und-nachbearbeitungsregeln.md).
# Ringing and after-call work rules
#### How do I choose the ringing mode?
The ringing mode determines how incoming calls are distributed to the available agents.
| Mode | How it works | Recommended use |
| ---------------- | ----------------------------------------------------------------- | -------------------------------------------------- |
| Parallel ringing | All available agents are called simultaneously | Small teams, fast answer desired |
| Longest Idle | The agent who has gone the longest without a call is called first | Balanced utilization |
| Fixed order | Agents are called in a defined priority order | Certain agents should receive calls preferentially |
Procedure:
1. Select the desired ringing mode in the Contact Center Channel settings.
2. For fixed order, define the agents' priority order.
3. Save.
#### How do I set up the after-call work time?
The after-call work time (ACW) gives agents a call-free period after each conversation for documentation and follow-up work.
Procedure:
1. Via **Edit ringing rule** navigate to the after-call work time settings, activate the checkbox, and enter the desired ACW duration.
2. Save.
Agents will then automatically receive no calls for the set duration after each completed call.
---
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