Multi-Tech Systems MVP210-SS - Manual (Page 227)

MultiVOIP User Guide T1 PhoneBook Configuration
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The Outbound PhoneBook for the Minneapolis VOIP is shown below.
The third destination pattern, “7” facilitates reception of co-worker calls
using local-appearing-extensions only. In this case, the “Add Prefix”
field value for this phonebook entry would be “1410325” .