1. Description

For some telephone lines, it is necessary to announce the start and end of button press recognition; for this, the In-band DTMF component is used.

The block (Fig.1(1)) is used in space to build the Flow. The settings panel for this component opens (Fig.1(2)) when you click on the block.

Open

Fig.1. In-band DTMF component

1.1. In-band DTMF block

The block consists of the following elements:

1. The name of the component;

2. In branch — receiving (connecting with the previous block) branch;

3. Out branch — outgoing (connecting with the following block) branch. When hovering over the Out field, a switch appears. The switch allows this component to be connected to a component that already has a connection.

The presence of an icon indicates that the switch is on, and this component can be connected to a component that already has a connection.

Changing the switch position removes the outgoing branch of this component.

The button deletes the block from the Flow Schema.

1.2. In-band DTMF settings panel

It consists of the following elements:

1. State;

2. Break;

3. Limit;

4. Add description.

1.2.1. State

When you click on the State field, a drop-down list opens from which you have to select a value. Available value:

• start — start of button press recognition;

• stop — end of button press recognition.

1.2.2. Break

1.2.3. Limit

Fig. 2. Setting a limit

1.2.4. Add description

Fig. 3. Add description