If your service provider sends 7 digits but you only need 5, you need to absorb the first 2 digits in the digit string.
Procedure
Enter change trunk-group 5.
In the Digit Treatment field, enter absorption.
This field tells Communication Manager to remove digits from the incoming digit string. These digits are always removed from the beginning of the string.
In the Digits field, enter 2.
For absorption, this field defines how many digits will be absorbed. Communication Manager will remove the first 2 digits from the digit strings delivered with incoming calls. For example, if the central office delivers the string 556-4444,Communication Manager will change it to 64444, an extension that fits your dial plan.
In the Expected Digits field, enter 7.
This field tells Communication Manager how many digits the central office sends.
Note:
The Expected Digits field does not appear on the screen for tie trunk groups.
