## Unnamed Registration

Unnamed registration is a capability an IP telephone can have to register with a call server, and receive limited service, without requiring an extension and password entry. Typical environments where this functionality is useful include:

- “Hot-desking” environments where there is a period of time between one user logging out and another user logging in on the same telephone.
- Using the Avaya Softphone application in “road warrior” mode, which allows a traveller to invoke the telephony features and functionality by taking over the office telephone extension. This takeover unregisters the office telephone.

In both examples, the user unregisters the telephone by logging off or by taking the office telephone extension over to another telephone. Without unnamed registration, the telephone in the first example will just wait for an extension and password entry and the telephone in the second example will continue attempting to register at regular intervals. The downside of a telephone being unregistered is that no one can use the telephone, for example, to report a building emergency like a fire.

Unnamed registration allows the telephone to register without an extension and password. Because there is no extension, telephony functionality is limited, specifically:

- The user has only one call appearance, and hence, cannot transfer or conference calls.
- The user has no administered feature buttons, and cannot invoke on-hook dialing.
- Extension-based information, like a given user’s Contacts data or Option settings are not available.
- The user is limited to the calling capability administered for PSA (Personal Station Access) on the call server, for example, access to an emergency number.

Unless otherwise disabled, the telephone automatically attempts to register unnamed if no action is taken on the telephone Extension entry screen within 60 seconds. Initiating any ID or password entry disables and prevents unnamed registration from occurring. Unnamed registration is ignored after any dialpad entry.

Administrators can disable unnamed registration by appropriately administering the system parameter UNNAMEDSTAT, as indicated in Chapter 7 of the Avaya one-X Deskphone Edition for 9600 Series IP Telephones Administrator Guide. Unnamed registration appears to the end user like Avaya Communication Manager TTI Mode, and is similar from an administration perspective. For more information about TTI, see your Avaya Communication Manager documentation.