Aastra Telecom 6757I 사용자 설명서
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Model 6757i IP Phone User Guide
Line Keys and Softkeys
Expansion Module Keys
5. Select from “Key 1” through “Key 36” (M670i)
or
Select from “Key 1” through “Key 60” (M675i)
Select from “Key 1” through “Key 60” (M675i)
6. In the "Type" field, select Empty.
7. Click
to save your changes.