Aastra DT690 User Manual page 7

1424-EN/LZT 103 090 Uen A1 2008-10-24
23 Installation
23.1 Check for completeness
23.2 Charging the Battery
23.3 Charging Spare Batteries
23.4 Replacing the Battery
23.5 Chargers
23.6 Headset
23.7 Hinge-type Clip
23.8 Swivel-type Clip
23.9 Bluetooth Headset
23.10 Portable Device Manager
24 Useful Hints
25 Reference
25.1 Terminology
25.2 Phone Signals
25.3 Maintenance
25.4 Technical Specifications
25.5 Spare parts and Accessories
26 Troubleshooting
27 Glossary
28 Telephony Service Prefixes
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