The OUIFilter.cfg file allows you to enter more than the first three octets of a MAC address if necessary to narrow down the phones – or even a specific user’s phone.

For example:

00.10.49 ShoreTel                                    <--  This will show all ShoreTel phones in the environment Bob’s ShoreTel 230    <-- This will identify a specific phone

If you have phones and network equipment that both use the same MAC prefix (OUI), then use the next digit to narrow it down:

00.23.1B.6A Cisco