Contents
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z4 User Manual
Reset to default settings
43
Working with talkback
44
How to use the talkback button
44
Working with telephone hybrids
45
How to take a phone-call
45
Finishing a phone-call
46
MAINTENANCE AND SERVICE
47
Maintenance by the user
47
Reading out the software information
47
Defective modules
48
Cleaning the operating surface
48
Maintenance by the Lawo AG
48
GLOSSARY 50
Summary of Contents for z4
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