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Starting from Android version 9 and higher, the Queue Management application gives an error related to the creation of its "Queue Management" workbook.
In case of error after the installation, manually create the "Queue Management" folder on the root root of the android device.
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Queue management allows you to view on the screen of a tvbox/tablet the numbers that are called to be served. Tablets or mobile phones can be used as terminals.

To work, you need a wi-fi router that acts as a point of union with all the androids that form the configured system.

It can be configured as Server, Client and Terminal

The Server manages the numbers received from the Terminals and their repetition on the Client screens

The Terminal manages the numbers to be announced and displayed by the Server. Each called number can be associated with one of the four configurable descriptions relating to the department/desk.

The Client manages the repetition of the announcement and display of the numbers present on the Server.

A minimal system consists of a Server and a Terminal.
A maximum system consists of a Server, nine Terminals and three Clients.
Both Clients and Terminals must have the same IP and Port shown by the Server.

For the Server and the Clients, two areas are available for displaying advertising images to be used as self-promotion or to promote something else. Both the order and the display time can be configured for each individual area.

Several options allow you to customize each element of the system.

This demo version only allows ten number calls after which it closes.