User manual

AT820
AT820
AT820
AT820 Series
Series
Series
Series User
User
User
User Manual
Manual
Manual
Manual
3
ATCOM TECHNOLOGY CO., LIMITED www.atcom.cn
5.4.1 SIP
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27
5.4.2 Codec Configuration
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28
5.4.3 Call Feature Setting
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28
5.4.4 Dial Plan
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29
5.5 Phone Setting
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31
5.5.1 Preference
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31
5.5.2 Line
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33
5.5.3 Features
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34
5.5.4 Voice
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35
5.5.5 Ring
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36
5.5.6 Tone
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36
5.6. Update
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37
5.6.1 Manual Update
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37
5.6.2 Auto Provision
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38
5.6.3 Reset & Reboot
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39
5.7 Phone Book
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39
5.8 Call Log
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39
6. FAQ & Trouble Shooting
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40
6.1. Frequently Asked Questions
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40
6.1.1. How to make the factory reset
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40
6.1.2 Upgrade firmware under safe mode
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40
6.1.3 How to make direct IP call
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41
6.2 Trouble Shooting
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41
6.2.1 The phone can ’ t register successfully
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41
6.2.2 The phone can ’ t obtain IP address
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41
6.2.3 Only one part can hear the voice during the call
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42