For ETP-500:
To disable automatic activation of output one:
Call the station and wait for the string of tones.
Enter *4** to login, wait for single tone in confirmation.
Enter *88*, wait for single tone in confirmation.
Hang up.
To enable the use of *4** for activating relay on as a momentary door release:
Call the station and wait for the string of tones.
Enter *4** to login, wait for single tone in confirmation.
Enter *75*, wait for single tone in confirmation.
Hang up.
You can also do the two commands in the same call *4**, *75*. *88*
For ETP-520:
To disable automatic activation of output one:
Call the station and wait for the string of tones.
Enter *4** to login, wait for single tone in confirmation.
Enter 111111#75, wait for single tone in confirmation.
Hang up.
To enable the use of *4** for activating relay on as a momentary door release:
Call the station and wait for the string of tones.
Enter *4** to login, wait for single tone in confirmation.
Enter 2#67, wait for single tone in confirmation.
Hang up.
You can also do the two commands in the same call *4**,2#67, 111111#75