With the manual signaling feature, one user can signal another user. When a user presses the manual signaling button, the other user hears a 2-second ring. The status lamp of the user who presses the button lights for two seconds.

If the telephone of the intended recipient of the signal is already alerting, the system:

• Does not generate the 2-second ring

• Causes the manual signaling button lamp of the user who presses the button to flicker briefly