The Zoom Dialer 27 is used for hot line applications and for controllingthe calls which can be made from a phone line. Patented technologyallows a single dialer to control the numbers which are dialed by all ofthe phones or extensions on a line.

In hot line mode the dialer will respond to one of four installer-designatedtriggers and will always dial a single phone number. Trigger options include: dialing after a dial tone of a programmable duration (one to ten seconds) is detected, dialing immediately after dial tone is detected, dialing after the first digit of the phone number remains pressed for one second, and dialing upon receiving power. With thepower trigger, a Model 27 can be used to dial a phone number for remote sensing applications.