If the Communication Timeout time is set and the set time has elapsed, obtaining address book is cancelled when the Remote Address Book Server is not responding.
1.
Press 
→ [Set Destination] → [Acquire Remote Address Book] → [Communication Timeout].
→ [Set Destination] → [Acquire Remote Address Book] → [Communication Timeout].2.
Specify the Communication Timeout time by pressing [-] or [+] → press [OK].