Panasonic DBS 576 User Manual page 72

6. Using Additional Features
same DN may be assigned to multiple keys on the same telephone and to keys on
other telephones.
When a telephone's extension number is assigned to a key on the same telephone, it
is considered a Primary Directory Number (PDN). Up to three appearances of the
PDN may be assigned to keys on a key telephone. This allows for multiple calls on
the same Directory Number.
When a DN is assigned to an FF key on another telephone, it is considered a Non-
Primary Directory Number (NPDN). Up to three NPDN appearances of the same
DN may be assigned to keys on a telephone. This allows calls to the DN to appear
on multiple telephones. The calls ring in on a specified basis - immediate, delayed,
or no-ring.
A telephone may only have one PDN (on up to three keys) but may have multiple
NPDNs with up to three appearances of any one NPDN.
Figure 19. Example Directory Number Assignment for Extension 200
When a caller originates a call, the call appears on the first available PDN key. If all
PDNs are unavailable, the call will select the EXT LED.
72 DBS 576 (USA), issued January 1999 576-25-750