| 
 | 
 | TROUBLESHOOTING | 
| 
 | 
 | 
 | 
| Display shows | Probable cause | Action or comment | 
| 
 | 
 | 
 | 
| Phonebook is not | The phonebook does | Try again later. If the | 
| available at the | not respond, not | error is not resolved, | 
| moment | available at the | contact the system | 
| 
 | moment. | administrator | 
| 
 | 
 | 
 | 
| Voice mail | There is no voice | Define a voice mail | 
| number not | mail number defined | number via WinPDM | 
| defined | in the phone. | or CPDM. Contact | 
| 
 | 
 | the system | 
| 
 | 
 | administrator. | 
| 
 | 
 | 
 | 
| Could not | The “Encryption | Perform one or more | 
| encrypt | Required” parameter | of the following steps: | 
| connection | is enabled in the | • Disable the parameter | 
| 
 | phone in combination | • Enable the encryption in | 
| 
 | with either or both of | the base stations | 
| 
 | the following options: | • Use the supported base | 
| 
 | • one or more encrypted | stations. | 
| 
 | base stations | Make sure to use | 
| 
 | • one or more unsup- | |
| 
 | base stations of | |
| 
 | ported base stations | version 3.1.x or | 
| 
 | 
 | higher | 
| 
 | 
 | 
 | 
| 128 | 
