TELEPHONE INTERCOM J-1 CURRENT

- Works on the existing phone network without
 other wiring.
-High connection to clips, an intercom to each
 phone.
-Internal intercom without being occupied
 the city line when we call from
 external line is the call to the handset
 and one of the two speakers answers.
  -Transfer an external call from a phone
 at the other.
-Direct dial up to 10 internal points.
-Insulating the other devices when some
 speaks with an outside line.
-A internal call sounds a buzzer that is
 in the intercom and we can adjust the volume through the phone keypad,
still gives us a voltage for relay 24V DC - 100mA in case the sound is not enough
to activate an external bell or other load.
 -The DC voltage for external relay is obtained from the middle output at terminals 1 & 4.

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