Camp-On; Clear Call - Iwatsu ADIX VS Owner's Manual

Camp-On

When you want to transfer a call to an extension that is busy:
Do not hang up
Press and release the receiver button quickly
Wait for the dial tone
Dial the desired extension number
Hang up
To answer a Camp-On call:
Hang up on the first call
Answer the second call
Or
Place the first call on Hold or Call Park
Hang up or press the receiver button
Answer the second call

Clear Call

When you make an intercom call, but the called extension cannot be
reached, and you wish to call another extension:
Do no hang up
Dial the second extension number
Single-Line Telephone User's Guide - 139