Monroe Electronics R173 - Manual (Page 10)

10
Description
The Model 3567 Audio Control Board is a 3"x5" circuit card designed to record and replay a
message, and then detect the proper DTMF
®
tone sequence to pass telephone line audio to
an external modulator. It can also control the user’s devices via built in normally open relay
contacts.
Specifications
Power Requirements
+12VDC @ 75 mA
Physical 5"H x 3"W x 0.6"D
Operation
The DTMF audio input level from the 600 ohm transformer on the 3137B is adjustable.
Normal position is in the center of it’s range. Generally, problems arise if the level into the
DTMF
®
decoder are is high.
To record your message, make sure power is supplied to the unit and remove the front
cover of the rack:
Depress and hold down the REC button while speaking at normal voice level about 6
- 10 inches from the microphone.
When finished, release the button.
Message duration is limited to 60 seconds.
When calling the unit, the message will automatically play back continuously, until the
proper DTMF
®
sequence has been received.
The default activation code is 911. This is selected by removing all jumpers from J1 pins 1,
2, and 3. If a different code is desired, install jumpers as shown in the table below to select
indicated codes.