When another user logs in at an extension, they control that phone. Any existing user, including the default associated user, is logged out of that phone.

• Any user settings not applicable to the type of phone on which the user has logged in become inaccessible. For example some programmable button features will become inaccessible if the phone at which a user logs in does not have a sufficient programmable buttons.

• 1400, 1600, 9400, 9500, 9600, and J100 Series telephones all use the centralized call log and centralized personal directory features that move those settings with the user as they hot desk.

• Other Avaya H.323 IP telephones can be configured to backup and restore user settings to a file server when a user hot desks between phones. The range of settings supported depends on the particular phone model. Refer to the Avaya IP Office™ Platform H.323 Telephone Installation manual.

• For all other features and phone types, it must be assumed that any settings and data shown by the phone is stored by the phone and are still accessible after logging off.

• By default the IP Office system blocks J129 and H175 phones from being used for hot-desking. If required, the NoUser source number SIP_ENABLE_HOT_DESK enables hot-desking support for those phones.

• Hot-desking is not supported for SIP softphone applications. That includes clients running on Avaya Vantage™ telephones.