Multiple Device Access

Last Updated : Apr 17, 2026 |
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Avaya J100 Series IP Phones9600 Series IP Deskphones support Multiple Device Access (MDA) with which you can simultaneously register up to 10 SIP devices for one user. You can define the Maximum Simultaneous Device using the Avaya Aura® System Manager.
With MDA, the user can do the following:
  • Make and receive calls on any registered device.
  • Move to another registered device during an active call.
  • Bridge on to calls on multiple registered devices.
    Alert other registered devices about an incoming call to your extension. When user answers a call on a device, the alerts on all the other devices stop. During the call, the other devices display an active call indicator on the call appearance for the active line.
  • Be on multiple concurrent calls on different devices, but only one call on each device.
    For example, user can listen to a conference call on one device and answer an incoming call on a second device without putting the conference call on hold. The two calls are on separate call appearances on all registered devices.
  • Use conference and transfer features.
    When user bridges on to a call on any of the registered devices and start a transfer, the call drops from all devices after the transfer is complete.
If you try to register a new SIP device that exceeds the defined Maximum Simultaneous Device, then the user on the first registered device is logged out. You can define the behavior of the first registered device with the parameter PROVIDE_LOGOUT.
When you set PROVIDE_LOGOUT to 0, the device logs out and the phone screen does not show the login screen. However, the phone screen displays Login soft key for the user to login automatically without prompting for the credentials.
When you set PROVIDE_LOGOUT to 1, the device logs out and the phone screen displays the login screen. To enable the user to login without entering the credentials, use Quick Login Status in Avaya Aura® System Manager. For more information, see Avaya Aura® System Manager documentation.
For more information on the Multiple Device Access, see Multi Device Access White Paper on Avaya support site.
Related information
Feature and application configuration
Shared ControlShared Control prompt
Multi-Device Access