Yealink SIP-T20 - Manual (Page 6)

User Guide for the SIP-T20P/SIP-T20 IP Phone
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Packaging Contents on page 9
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Phone Status on page 13
Documentations of the SIP-T20 IP phone have also been added.
Major updates have occurred to the following sections:
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LED Instructions on page 4
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Anonymous Call on page 75
Major updates have occurred to the following sections:
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Appendix A - Time Zones on page 111
Major updates have occurred to the following sections:
LED Instructions on page 4
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Ring Tones on page 24
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Anonymous Call on page 75
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Troubleshooting on page 97
Major updates have occurred to the following sections:
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Appendix A - Time Zones on page 111
Major updates have occurred to the following sections:
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Basic Network Settings on page 14
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Keypad Lock on page 21
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Contact Management on page 26
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DSS Keys on page 37