Getting started

Backup battery charging

When the deskset loses power with the backup battery installed, the screen indicates the battery status (see table below) and displays Check AC power. When the backup battery is in low battery mode, the screen displays

Low battery. The backup battery is fully charged after 16 hours of continuous charging. See the table on page 82 for battery operating times.

The following table summarizes the battery charge indicators and actions to take.

Battery indicators

Battery status

Action

The screen shows

Battery has enough

Charge without

Low battery and

charge to be used for a

interruption at least one

flashes.

 

short time.

hour.

 

 

 

 

The screen

 

Battery is fully charged.

Keep the backup

shows

.

 

battery in the battery

 

 

 

compartment to

 

 

 

recharge.

 

 

 

 

Page 12
Image 12
AT&T SB67148 user manual Backup battery charging, Low battery