Siemens HICOM 300 - Manual (Page 8)

8
Extend Call to busy extension
What you have to do What happens
Extend call using Keypad Display shows
2250
SCROOBY J
BUSY INTERNAL or
BUSY EXTERNAL
Depress Display shows
CONNECTED
You are now reconnected to caller
Advise caller that extension is busy.
Caller has 3 options:
1. To hold for busy extension.
2. Ask for another extension.
3. Call again later or leave a message.