AT&T SB67020 User Manual page 138

Synapse SB67020/SB67025 Deskset User's Guide
No dial tone.
Probable Cause
Headset cannot
communicate with Deskset.
Batteries do not hold a charge.
Probable Cause
Bad battery or bad battery
connection.
Troubleshooting
Corrective Action
Verify that the Deskset can make external calls.

For more information, see
page 128.
You may be out of range of the Deskset; move

closer.
At the Deskset, confirm that your headset is

registered to the Deskset.
On the Deskset, press MENU –> 2 –> 6. If the
headset is registered, the screen indicates
Headset is registered.
Corrective Action
Make sure that the headset battery is installed

and securely plugged into the connector.
Charge the battery for at least six hours. For

optimum daily performance, return the Cordless
Headset to the charger when not in use.
You may need a new battery.

Your headset might be malfunctioning. Contact

the headset manufacturer.
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