CATV Switching & Control Products

DTMF Encoders / Decoders



DTMF Decoder

The Model 637 Dual Tone Decoder is a microprocessor controlled DTMF® decoder. The 637 is capable of accepting a sequence of from one to four DTMF signals, and responds by actuating its integral DPDT output relay. The relay action may be momentary, latching or toggling. Programming the code sequence is accomplished by digital rotary switches along the front edge of th PC board.

Please refer to the instruction manual for the 3185E for specific switch and control settings.

Data Sheet PDF
Manual PDF


Cue Tone Decoder

The Model R173 Cue Tone Decoder utilizes Cue Tone signals transmitted over satellite transponders or standard dial-up telephone lines. Use of the Cue Tone Receiver permits automatic, unattended operation of switching equipment in locations where non-duplication, blackout, or routing is required.

By utilizing the ‘Set’ and ‘Reset’ inputs on each channel, the Model R173 Cue Tone Decoder may be used as a telephone override for the R-149 Program Timer or R153 Program Timer 2, when controlling Switcher Panels. In this mode, up to 12 channels per Decoder may be controlled.

A Voice Response/Security Control PC Board is installed. The unit responds to a telephone call with a voice message. The board then requires a 3 digit DTMF code entry to allow access to the individual decoders.

What are Cue Tones? (PDF)
Data Sheet PDF
Manual PDF

3137B Manual PDF
3185E Manual PDF


Cue Tone Encoder

The Model 935A Cue Tone Encoder generates DTMF cue tones. These tones are used by satellite and microwave program services to provide automated headend switching functions.

The 935A is contained in a wall mount enclosure, containing a barrier strip for all connections

What are Cue Tones? (PDF)
Data Sheet PDF
Manual PDF


Cue Tone DTMF Encoder

The Model R103A Cue Tone Encoder is the preferred method of sending control signals over program audio or audio grade links.

Front panel pushbutton switches or external contact closures, initiate the DTMF cue tone sequence. Relays allow the cue tones to be placed on interrupted program audio if desired, or on a separate voice grade audio sub-carrier.

Indicator lights on the front panel verify that the tones generated are the proper sequence.

Remote indicators may be switched from screw terminals on the rear panel.

What are Cue Tones? (PDF)
Data Sheet PDF
Manual PDF

Digital Alert Systems Inc., P.O. Box 535, 100 Housel Avenue, Lyndonville, NY 14098
phone:1-585-765-2254  fax:1-585-765-9330
Copyright ©1999-2019 Digital Alert Systems, Inc.