Internal calls, Calling an extension in your telephone system, Features used with internal calls – Siemens 600 Series User Manual
Page 45: Internal calls –7, Calling an extension in your telephone system –7, Features used with internal calls –7
 
Using Your Phone
2–7
2. U
sing
 You
r P
hone
Internal Calls
Calling an Extension in Your Telephone System
Every telephone in your company’s telephone system 
has an extension.
To call another 
extension
➩
Get a dial tone.
➩
Dial the extension.
If you are a member of a community (com) group, you 
can dial a short code instead of an extension to call 
another member in your group. (See “Community 
(Com) Group Call” on page 3–18.)
Features Used with Internal Calls
The following features can be used with internal calls:
• Bridged Call - lets you join an existing telephone
call on a busy multiple line appearance. (See 
“Bridged Call” on page 3–3.)
• Busy Override - lets you enter a conversation on a
busy extension. (See “Busy Override” on page 
3–5.)
• Busy Standby Queuing - lets you stay on the line
until the busy extension you have dialed becomes 
free. The CBX then dials the extension. (See “Busy 
Standby Queuing” on page 3–6.)
• Buzz - lets you signal the telephone of another
person, such as a secretary, with a special tone. (See 
“Buzz” on page 3–17.)
• Callback Request - directs the CBX to complete
calls to busy extensions while you wait. It lets you 
hang up and have the CBX call you back when the 
extension becomes free. After you answer, the 
CBX dials the number for you. (See “Callback 
Request” on page 3–7.)