Comdial DSU and DSU II System Reference Manual page 84

Using The Other Telephone Features
If your system provides all-call or zone paging,
1. Lift handset.
2. Press INTERCOM.
3. Dial 87 for all-call,
—OR—
dial 84, 85, or 86 for zone 1, 2, or 3.
4. Make announcement.
5. Stay on line if awaiting a reply (known as "meet-me" page),
—OR—
hang up to end.
NOTE: If you have programmed paging buttons, use them instead of
the dialing codes shown above.
To make a reply to a "meet-me" page,
1. Lift handset of nearest telephone.
2. Press INTERCOM.
3. Dial 88.
4. Meet paging party on line.
8–12 LCD Speakerphone Reference Manual
GCA70–245