Dell 2155cn/cdn Color Laser Printer - Manual (Page 498)

496 Understanding the Printer Menus
Pattern1–7 DRPD is a service provided by some telephone companies. DRPD
Patterns are specified by your telephone company. The patterns
provided with your printer are shown below:
Ask your telephone company which pattern you need to select to use
this service. For example, Pattern 7 is the New Zealand FaxAbility
distinctive ringing pattern: rings for 400 ms, stops for 800 ms, rings
for 400 ms and stops for 1400 ms. This pattern is repeated over and
over again. This printer only responds to Distinctive Alert cadence(s)
DA4 in New Zealand.
Pattern 1
Pattern 2
Pattern 3
Pattern 4 *
Pattern 5
Pattern 6
Pattern 7