Aastra Venture 3-Line with Answering User Manual page 29

Options chart
Number and Settings
Option (*=default)
* You may be required to subscribe to Caller ID or Caller ID on Call Waiting from your local telephone company.
28 Venture 3-Line Telephone with Answering Device User Guide
Option function
Numbers entered using the dial pad are automatically dialed out on the defined
Prime line. If no Prime line is set in option 11, you are prompted to press a line key
Numbers entered using the dial pad are displayed before dialing. You must
manually select a line to make the call.
When you change your phone's handset volume while you are on a call, the
change lasts for the duration of that call only.
When you change your phone's handset volume while you are on a call, the
volume change is permanently saved.
All incoming calls are logged in the Callers list.*
Only unanswered incoming calls are logged in the Callers list.*
No incoming calls are logged in the Callers list.
(Set this option for each line on your phone.)
Only one Callers list entry is created for all calls from that number (when no
message is left); a count of the number of times that number called is displayed (up
to 9x).* When a message is left, calls are not combined but logged separately.
Caller information is listed separately in the Callers list, regardless of how many
times the same number called.*
Prevents selected area codes from being shown in your Callers list. Useful in
locations where area codes cannot be used to make local calls. Area codes are
displayed in parentheses in the Callers list. Enter up to three 3- to 7-digit codes.
.