Note:
• You can be notified of the expiration date of the activation key for annual maintenance by e-mail 10 days before the expiration date. If this feature enabled, an e-mail message will be sent once a day until the expiration date. The notification will be stopped once the activation key is renewed.

• For activation key with an expiration date, you can extend their activation period by re-installing them before the expiration date. For extension before expiration date

• 1 year extension: Extend the activation period by 12 months from the scheduled expiration date. For extension after expiration date [For KX-NSX2201 Maintenance annual Key]
→ Extension within 1 year after expiration date: Extend the activation period by 12 months from the original expiration   date. 
→ Extension within 1 year after expiration date: Extend the activation period from the original expiration   date. You need to purchase activation keys for the invalid period. [For KX-NSX6211 Maintenance annual Key]
→ Extend the activation period by 12 months from the date when an activation key for re-installation is used. You will not need to purchase activation keys for the invalid period.
• If the Maintenance Annual Key (KX-NSX2201) has expired, the following features cannot be used;
→ Packet trace
→ Expanding system logs
→ IP traffic monitor
→ Web operation log
→ Service operation log
→ IP extension call quality information