When all DECT phones have been subscribed, Avaya recommends that you disable any further subscriptions. This does not affect re-subscription by extensions that are already configured in the IP Office configuration.

Ensure that no copies of the configuration are open in Manager during subscription, as sending such a copy of the configuration back to the IP Office system will replace the subscriptions and require the handsets to be subscribed again. Following any handset subscription, a new copy of the configuration should always be loaded in IP Office Manager if any other configuration changes are required.