AT&T System 25 - Manual (Page 47)

Automatic Intercom
❑
You and another person may each have a button labeled
AUTO ICOM
that you can use to call each other.
Using AUTO ICOM
1 Press
AUTO ICOM .
2 Listen for ringback.
Display
Automatic Intercom calls show the same information on the
display as all inside System 25 calls.
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