# Flash - Calibrated

## Description

Calibrated Flash provides an alternative method of generating a Switchhook Flash.

The Calibrated Flash is produced by using a dedicated button or by generating a Switchhook Flash of 24 ms or more (on industry-standard sets). Unlike alternative signaling methods (see Recall and Ground Button), Calibrated Flash does not require the use of a third wire or second pair.

## Conditions and Feature Interactions

- Calibrated Flash can only be used with revision "C" ONS line cards (MC320Cx).

- Calibrated Flash can only be used when a station is in a connected state (i.e., engaged in a call).

- Calibrated Flash and Switchhook Flash are mutually exclusive.

## Programming

1. Ensure the station to support Calibrated Flash is connected to a port on a revision "C" ONS line card (MC320Cx).

2. Feature Access Codes form

- Ensure that no feature access code is programmed as "1".

3. ONS/OPS Circuit Descriptors form

Enter the following parameters:

Flash Type: Calibrated

Low Flash Timer: blank

High Flash Timer: value

Ground Button: no.

## Device Support

2500 model telephones

## Operation

To generate a Calibrated Flash during a call:

- Press Calibrated Flash.

To return to the held party when listening to busy, reorder, or ringback tone:

1. Press Calibrated Flash.

2. Dial the Call Hold Retrieve feature access code.

NOTE: If you generate a flash while listening to ringback tone, you will release the ringing party.

Related Topics

- Flash - Switchhook

- Flash - Trunk

- Ground Button

- Recall