Why does my Aastra DT390 Cordless Telephone say 'Phonebook is not available at the moment'?
If your Aastra Cordless Telephone displays 'Phonebook is not available at the moment', it indicates that the phonebook is not responding or is currently unavailable. Try again later. If the issue persists, contact the system administrator.
What to do if my Aastra Cordless Telephone shows 'Enter PIN code'?
If your Aastra Cordless Telephone displays 'Enter PIN code', it means the telephone lock is activated. You should enter the required PIN code. If you've lost the PIN code, enter a new one via PDM or perform a factory reset via PDM.
Why does my Aastra Cordless Telephone call switch off after 2 seconds?
If your Aastra Cordless Telephone switches off after 2 seconds during a call, it means the phone is defective. Contact the system administrator.
What does it mean when the signal strength icon is off on my Aastra Cordless Telephone?
If the signal strength icon is off on your Aastra Cordless Telephone, it means you are out of the system coverage area or the phone is defective. Try entering the coverage area, or contact your system administrator.
What to do if my Aastra Cordless Telephone displays 'No System' and beeps?
If your Aastra Cordless Telephone displays 'No System' and beeps once a minute, it means the telephone is out of coverage or defective. You can stop the beep using the Silent off key and move into the coverage area. If this doesn't resolve the issue, contact your system administrator.
How to fix 'No display' on Aastra Cordless Telephone?
If you see 'No display' on your Aastra Cordless Telephone, it means the battery level is low or the phone is defective. Charge the battery. If the issue continues, contact your system administrator.
What to do if the signal strength icon is off on Aastra Cordless Telephone?
If the signal strength icon is off on your Aastra Cordless Telephone, it may be because you are out of the system coverage area, or the phone is defective. Try moving into the coverage area. If the issue persists, contact your system administrator.
Why is there no display on my Aastra DT390?
If your Aastra Cordless Telephone displays 'No display', it indicates that the battery level is low or the phone is defective. Charge the battery to resolve the issue.
What does 'SERVICE NEEDED Parameters corrupt' mean on my Aastra DT390?
If your Aastra Cordless Telephone displays 'SERVICE NEEDED Parameters corrupt', it means the phone is defective. Select the reset option using the middle soft key and upgrade the phone’s software. If there is no reset option available, or if the error persists, the phone requires repair. Send the phone for service.
Why does my Aastra DT390 Cordless Telephone beep and display 'No system'?
If your Aastra Cordless Telephone is beeping once a minute (for up to 30 minutes) with alternating low and high tones, and the display shows 'No system', it indicates that the phone is out of coverage or is defective. To stop the beeping, press the specified button. Move back into the coverage area, or contact the system administrator. Note that it may take a few minutes for the phone to register with the system again once you are back in range.
General| Type | Cordless Telephone |
|---|---|
| GAP Standard | Yes |
| Speakerphone | Yes |
| Frequency | 1.9 GHz |
| Range | Up to 300m (outdoor), Up to 50m (indoor) |
| Headset Connection | 2.5mm |
| Compatibility | Aastra communication platforms |
| Audio Quality | HD Audio |
Essential safety precautions to reduce risks like fire, shock, and injury.
Step-by-step guide to power on the DT390 cordless phone.
Instructions on how to power off the DT390 cordless phone.
How to answer incoming calls, mute ringing, and change answering modes.
How to transfer an ongoing call to another extension or busy line.
Protecting the phone from unauthorized use by requiring a PIN on power-on.
Instructions on how to charge the phone's battery using desktop or rack chargers.
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