Toshiba DKT2510-FS 用户手册

After reaching a busy or the Do Not Disturb (DND) mode, you can set ACB to have the system call 
you back when the called station is no longer busy or in the DND mode. ACB does not apply to 
outside calls.

➤

1. After reaching a busy station, press 

4

.

You hear busy tone, followed by dial tone (two secs.), then 
busy tone.

2. Hang up.

You can make other calls while waiting for the called station 
to become available.

3.

Line

 rings at a fast rate when the 

called station becomes idle.

4. Answer within three rings to 

prevent the callback from being 
cancelled.

You hear a single tone, as if making a regular internal call. If 
you used Tone Signalling instead of Voice First Signalling, 
you hear repetitive ringing.

If you hear busy tone after answering, it means the called 
party has already received or originated another call. Your 
request is not cancelled. You will be called again when the 
station becomes idle.

5. If you were attempting to make an 

outside call and did not use LCR, 
redial the telephone number.

If the original call was made using LCR, the telephone 
number is automatically dialled.

1. Lift the handset

...or lift the handset and press 

Line

.

You hear internal dial tone.

2. Press

 #43

.

3. Hang up.