Thank you for having the manual I needed for an older model Aiwa stero I had found on Ebay --- I wanted the Aiwa because I had tapes and cd's but I did not have a manual as to how to operate the system... I found what I needed and it has enabled me to set the system up for my enjoyment.
I wished detailed information of the JBL S310 and here I found it! Very happy with the service from this site!
Text excerpt from page 24 (click to view)
Making Calls
To adjust the receiver/speaker volume while talking
3 levels (HIGH, MEDIUM and LOW) are available for the receiver and 6 levels for the speaker.
To increase volume, press [ ]. To decrease volume, press [ ].
� The display shows the current volume setting. � If you try to increase/decrease volume when it is at the maximum/minimum level, the handset will beep 3 times.
Ex. Receiver volume: HIGH Speaker volume: level 6 Volume Low High CH Hold
Backlit LCD display
The lighted display of the handset will stay on for a few seconds after pressing a button or lifting the handset off the base unit.
Lighted handset keypad
The handset dialing buttons will light when you press a button or lift the handset off the base unit. The light will go out after a few seconds.