Toshiba DKT2510-FS 用户手册

Some procedures in this user guide instruct you to perform a step while “on-hook” or “off-hook.” 
These terms refer to the position of the handset. “Off-hook” indicates that the handset should be lifted 
off of the telephone cradle. “On-hook” indicates that the handset should remain in the cradle and 
should not be lifted.

Your telephone has a volume increase and decrease button for controlling speaker and handset 
volume levels. 

You must hold down either button (

Vol

 ▲/

Vol

 ▼) for at least 1/8 second for any volume change to 

occur. If you continually hold down either button, the volume continually changes about every half 
second until the level limit is reached.You hear ring tone as long as you press a Volume button when 
your telephone is idle.

The method for changing feature volume varies. Some features can be adjusted using only the 

Vol

 ▲/

Vol

 ▼ (see 

Table 4

) and others require additional buttons (see 

Table 5 on Page 12

)

.

▲

▼

Ring Tone Volume/Incoming Handsfree 
Answerback and Speaker OCA

On-hook, 
Idle

Adjusting the ring tone volume also changes the volume level of 
incoming Handsfree Answerback and Speaker OCA calls before 
they are answered by pressing a [DN].

Handset Receiver

Off-hook

After a call is terminated and the handset is on-hook, the volume 
level returns to the “original” level for the next call. This “original” 
level can be adjusted to higher/lower in system programming.