Yeastar Technology NeoGate User Manual page 55

Step 3: Create Callback Rules
You will need to create callback rules when the system should strip or add digits.
Items
Trunk Name
Strip digits from front
Prepend before dialing
http://www.yeastar.com
Figure 7-38
Description
Choose the trunk with callback rules
Define how many digits will be stripped from the call
in number before the callback is placed.
Define digits added before a callback number before
the callback is placed
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