Multi-Tech Systems E1 - Manual (Page 194)

T1 Phonebook Configuration MultiVOIP User Guide
194
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” .