RCA 25403 Mode D'emploi page 39

For example
Local access number of long distance company
Authorization code (ID)
Long distance phone number
1. Press the line you want.
2. Press memory location 6.
3. Press memory location 7.
4. Press memory location 8.
Display Messages
The following special messages indicate the status of a message or the unit:
00 TOTAL CALLS The Caller ID memory log is empty. (Not applicable to model 25403.)
UNKNOWN CALLER The incoming call does not have Caller ID service or their service area is not linked to yours. If UNKNOWN CALLER appears
along with a calling number, the name information for that number was not available. (Not applicable to model 25403.)
BLOCKED CALL The caller is registered as "Private Number "and their Caller ID information is withheld. (Not applicable to model 25403.)
INCOMPLETE DATA Caller information has been interrupted or corrupted during transmission. (Not applicable to model 25403.)
NO DATA No Caller ID signal has been detected, or Caller ID service has not been activated. (Not applicable to model 25403.)
START/END You are at the beginning or the end of the Caller ID memory log. (Not applicable to model 25403.)
Battery power level is low.
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Memory location
6
7
8
Other Information
39