The address book of the T300/500 PBX system provides access to important or frequently used phone numbers and a detailed view of each entry.
Click on Addressbook in the menu bar.
The contacts can be called directly from the address book:
You can use up to 8000 entries.

Adding entries

Click on New Contact in the addressbook view. An editing window opens with all fields for the contact's address book and detailed view.
Import entries using a CSV-file

Import entries using a CSV-file

Click on Import to upload your CSV-file

Click on Download to create the template for your CSV-file.
Add your contacts into this file.
Click on Import to upload the contacts.

Delete entries

Delete the entries one by one by clicking the X in the addressbook view.
The complete address book from the command line.

Delete complete address book

Login the the PBX using SSH.
On the command line. psql asterisk

  [root@T300 ~]# psql asterisk
  Welcome to psql 8.3.12, the PostgreSQL interactive terminal.

  Type:  \copyright for distribution terms
         \h for help with SQL commands
         \? for help with psql commands
         \g or terminate with semicolon to execute query
         \q to quit

  asterisk=#

Check if the table person exists. select * from person;

  asterisk=# select * from person;
    id  | accountid |     familyname      |          firstname          | folder 
  ------+-----------+---------------------+-----------------------------+--------
      0 |         0 | Nobody              |                             |      0
   1000 |      1000 | Eric                | Kantoor                     |      0
   1034 |      1038 | Prive               | Prive                       |      0

To delete the complete address book. delete FROM person WHERE id > 0 and accountid = 0;

  asterisk=# delete FROM person WHERE id > 0 and accountid = 0;
  DELETE 323
  asterisk=#

To exit the postgres database.

  asterisk=# \q