Toa VS-900 - Manual (Page 19)

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CHAPTER 2. BASIC OPERATION OF MASTER STATION
2.2. Calling a Master Station (Telephone)
Step 1. Dial the desired station number. (Dialing can be
performed with the handset on-hook or off-hook.)
Step 2. A trill call tone is heard at the calling station
handset. (This tone will be heard from the
station's internal speaker if dialed with the
handset on-hook.)
Step 3. The call tone stops and conversation can
proceed when the called party answers.
Step 4. To terminate the conversation, replace the
handset or press the [C] key.
9 2
Call tone
or
C