Urmet elekta steel 1060/23 Manual De Usuario página 17

The warning message shown by the side will appear when the conversation is
stopped by the apartment unit.
A page containing an error message will appear for 2 seconds if an incorrect
code is entered.
If the apartment station is busy in another conversation, the message shown by
the side will appear on the display.
The warning message shown by the side will appear when the apartment unit
refuses the call.
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DS1060-169