AT&T System 25 - Manual (Page 49)

Paging
If your company has a paging system, you may access the
system by using either a button or a code. See your System
Administrator for the paging access code, and for additional
information if you have zoned paging.
Using the Paging System
1 Listen for dial tone.
2 Press or dial the paging access code.
NOTE: If you dialed a code, listen for
3 Make your announcement, then hang
confirmation tone.
up.
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