Lexmark CX725
A distinctive ring service lets you have multiple telephone numbers on one telephone line. Each telephone number is assigned a different ring pattern.
From the home screen, touch Settings > Fax > Fax Setup > Fax Receive Settings > Admin Controls > Answer On.
Select a ring pattern.
Connect your mobile device to the Wi‑Fi network of the printer.
Connect your printer directly to an active telephone wall jack or share a line with an answering machine.