HYOSUNG NH-2700 Operator's Manual page 251

NH-2700 7. Appendix
3) Select "TELEPHONE NUMBER" menu.
4) Be sure to input the telephone numbers both in the HOST PHONE #1 and in the HOST PHONE #2
after selecting "HOST PHONE #1" and "HOST PHONE #2" menu and click 'ENTER' on the pinpad.
5) After above procedures, press IN SERVICE button or '1' key on the pinpad in the main screen.
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