Why did the central address book icon disappear on my handset

Unfortunately, we had a subtile issue in versions 355 and 380 where the address book was not available after a roaming or a handover of a handset. This issue was fixed with version 400 B2, released in November 2017. In order to fix the problem and have the central address book properly working, you have to:

1. Upgrade to version 400B2 or later
   • logon on the web interface
     
     
   • click on the Firmware Update link
     
     
   • fill the Firmware update server address field with  http://dect.snom.com
     
     
   • For the fields Update Base Stations and all the handset please fill: 
     
     • Required version: 400  
     • Required branch: 2
       
       
   • Click Save / Start Update
     
     
2. After the update you should apply a change on the address book (adding a new entry, or modify some of them) and wait for all the bases to download the new address book (by default 3CX is using a 30 minutes timeout).

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