# &adminguide;

## Overview

This module for handling as-feature-event presence messages Provides support for 'Device FeatureKey Synchronization', as described in http://community.polycom.com/polycom/attachments/polycom/VoIP/2233/1/DeviceFeatureKeySynchronizationFD.pdf This 'protocol' was developed at Broadsoft, and is used in Linksys/Cisco and Polycom phones and probably some other too. It allows to set up features like dnd (No Not Disturb) and call forwarding using phone interface and have that status updated on aplication server/ proxy or otherway, set those features on aplication server using some gui, and have this data provisioned on phone. For Shared Line Appreance application this let You share status on all phones.

## Dependencies

### &kamailio; Modules

The following modules must be loaded before this module:

- sl

- presence

- pua

### External Libraries or Applications

The following libraries or applications must be installed before running &kamailio; with this module loaded:

- libxml2 - xml handling library.

## Parameters