Mitel SX-200 Documentation page 197

Superswitch electronic private automatic branch exchange epabx

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SECTION MITL9105/9110-096-105-NA

EARTH GROUND BUTTON

As an alternative to switchhook flash, users may wish to use an Earth

Ground Button. This alternative may be invoked by selecting the 'Earth

Ground Button' Class-of-Service Option.

All telephone sets using this option must be equipped with an earth

ground button.

Select Class-of-Service Option 101 (Earth Ground Button).

On sets using this option, wherever the operation calls for switchhook

flash, the earth ground button is pressed.

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