...
On the side menu, click Telephony → Recall rules. This page contains preset rules for returned calls.
Creating New Recall Rules
...
1. On the Recall rules page, click New recall rule.
2. In the New recall rule dialog window, do the following:
...
1. On the Recall Rules page, click
for a set of recall rules that you want to change.
2. In the Change Recall Rule dialog box, make necessary changes and click Save.
...
If you do not use a certain set of call forwarding rules, you can delete it. For this, click 
next to the name of a necessary set of rules.
The selected set of rules will be deleted.
...