Relays + multi channel power supply install

This is the Multi channel power supply and relays that I have installed in my employers office.

DC power supply,
providing power for the cameras
and relays. 

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 

Cisco / Linksys recently replaced the SPA 2102 and PAP2 devices with the SPA 112 devices. Installed is an SPA 112 which provides dial tone and a hot dial for the door phones. The dial tone from this device goes into the RC2A relay just below, and then to the E20B door phone (not shown). 

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.