overlap: VPIM

The number of digits in a VPIM shortcut (SMTP/VPIM prefix) that overlaps with the mailbox number. Typically, a shortcut overlaps with the first digit of the mailbox number.

Example

Overlap

Number dialed from another site

1

14167776244

If your company has mailbox numbers from 6000 to 6999, the shortcut defined above and the overlap of 1 indicates that all valid mailboxes begin with 6. This prevents mismatches with other addresses with the same prefix, such as 14167771234@neighbor.com.