# Ringing - Discriminating

## Description

Discriminating Ringing lets you distinguish between incoming internal calls, incoming trunk calls, tie line calls, and Callbacks by means of different ringing patterns (cadences).

The ringing patterns for Ringing - Discriminating are:

- Incoming internal: 1.0 s on and 3 s off (internal ringing)

- Incoming trunk: .5 s on, .5 s off, .5 s on, 2.5 s off (external ringing)

- Callback: .5 s on, .5 s off, .5 s on, .5 s off, .5 s on, 2.5 s off.

Ringing patterns on the 69xx IP Phones are user selectable, users can select the internal and external ring tone cadences. For more information, refer to the 69xx User Guide available on the Mitel Document Center web site.

## Conditions and Feature Interactions

When phones are presented with multiple incoming calls, the ring cadence matches the type of the first caller (internal or external/trunk). This applies to all multiline phones except the 69xx IP Phones which can match the ring tone to the call type being displayed on the phone.

## Programming

- System Options form

- For tie line calls, enable Ringing Cadence for Tie Line Calls.

## Device Support

Not applicable

## Operation

None

Related Topics

- Ringing Discriminating (Optional)