ECHO E-DD Single and Dual Direct Dial Sub-Stations


  • Hands-free duplex voice communication
  • Place calls to one or two predetermined locations
  • Receive calls from any station in the system
  • Remotely controlled contacts for gate/door activation
  • Call status LED
  • Remotely programmed using LCD stations or ECHO Windows® based software
  • CE Certified

The Federal Signal Models E-DD1 and E-DD2 Single and Dual direct dial substations provide efficient, hands free duplex two-way voice communications with single button call capability. Applications include doors, dock areas or any location where limited call selection is needed. The stations instantly adjust volume levels to compensate for high ambient noise levels while providing instantaneous high-speed connections.

The E-DD1 / E-DD2 direct dial substations may be preprogrammed to call any other station in the system. E-DD1 Single Call Station can call one location, E-DD2 Dual Call Station can call two locations. By pressing the Call button on the station, a call will be placed to the station at the preprogrammed location. A call may be canceled by depressing the cancel button. Built-in relay contacts may be activated from the calling Master Station for remote door control or anything that a normally open dry contact can initiate.

The E-DD stations are constructed of heavy gauge anodized aluminum with a rugged Mylar face plate. The E-DD1 Single Call Station is equipped with one Call and one Cancel button and a Call Placed LED. The E-DD2 Dual Call Station has two Call buttons, one Cancel button and a Call Placed LED. Both units have built-in, heavy-duty relay contacts. The units are intended for indoor use with flush E-BB2 Back box or E-SMB Surface Box.

The E-DD stations may be programmed for call destination, volume level and other features using any LCD Station in the system or via the Windows based programming software Model ECHO-SFW.

Voltage24VDC nominal (line driven from ECHO control)

Current Idle
Current Connected
Microphone Type
Microphone Sensitivity

Audio Output
1.0 watts

Loudspeaker Size
2.500 in

Loudspeaker Impedence
45 ohms

Volume Control
Via Keypad – 30dB in ten steps

Line Attenuation
24dB at 160kb/s maximum

Loop Resistance
170 Ohm maximum

Distance2 km (1.2 miles) maximum

CableOne twisted pair, non-shielded

Cable Termination
Plug-in screw terminal, non-polar

Relay Switching Capacity
3A at 240VAC

5A at 24VDC

Height13.250 in

Width7.130 in

Depth3.000 in

Shipping Dimensions
13.25″ x 7.13″ x 3

Net Weight
1.20 lb

Shipping Weight
1.50 lb
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