Your question about SiemensOptiset E contact adaptor

The following adapter provides two isolated connections. Adapter with two relays for two; alarm clock and door-occupied display.

• Each 1 RJ8 plug with a max. of  24V AC, 60V DC
• Output for the signaling of the call status  (busy-/available-signal)
• Output for the connection of external ringtones
• For the connection to Optiset E Basic / plus / Memory/ Conference telephones
• power supply not included in delivery