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1.2 Call extension phone
Some of the extension phones can't be directly connected to. Use
the virtual keyboard, enter switchboard number, open the option
menu and choose "Add 2-sec pause", and then dial the extension
phone number.
Type in as follows to call extension phone:
Zone description › switchboard number › temporarily held for 2s ›
extension phone number › call
1.3 Make international calls
If you need to make an international call, long press the 0 key
on the virtual keyboard until there appears the sign "+" for
international call prefix, which helps you call numbers from any
