|DC power supply, |
providing power for the cameras
|Relays, power supply, and ATA|
|SPA 112 on top, provides dial tone for door phones.|
RC2-A Relay activates door latches from DTMF
Enforcer 4 channel wireless receiver for FOB keychains
The RC2A is a DTMF activated relay. When someone presses the button on the E20B door phone the SPA 112 will hotdial the extension group for whatever phones are in the door phone hunt group. When someone answers the phone, they can then dial the programmable code that is set on the RC2A relay to activate the relay and "buzz" the door from their phone.
The Enforcer 4 channel wireless receiver is a wireless 4 channel relay that you can use with programmable keychains to activate a relay. In this application it is connected to door latches to "buzz" the doors open with a FOB keychain, similar to one used for a car alarm.
Since this image was taken an additional wireless receiver was installed to control the roll down gates so that the gate could be opened and closed with the push of a button.