# Callback - System Programmable

## Description

Callback – System Programmable lets you program the destination of a matured callback set against a key line or multicall line group. The destination can be programmed so that a callback matures either at the prime member in the group, or at any member in the group.

## Conditions and Feature Interactions

None

## Programming

- Program Callback Activation in the System Options form.

## Device Support

- Supported on all devices.

## Operation

With Prime Activation set:

- A callback is honored by the prime appearance of the group.

With Group Activation set:

- Any activity of a member of a group with a callback set causes the callback to be honored.