988 EAS Digital / Analog Override Interface DTMF Encoder DTMF Decoder Encoder Controller

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	3137B \| 3171B \| 3185E \| 3223B \| 3223C \| 3446A \| 90417

		3137B Unattended Answering Device Monroe Electronics Model 3137B Unattended Telephone Answering Device is an FCC-registered auto-answer telephone coupler on a 3" X 5" circuit card. The 3137B is designed to interconnect unregistered customer equipment to the switched public telephone network. Manual PDF

		3171B DTMF Encoder The 3171B DTMF Encoder is a plug in circuit card, desinged to convert a 4 line BCD logic input into a DTMF audio output. The 3171B can be provided with standard or special programming, allowing transmission of multi-digit tones when used with the 3223C or 3223B Encoder Controller. When provided with standard programming, the DTMF digits will be produced in response to the BCD inputs as shown in the table. When provided with special programming, the customer supplies the tones to be generated in response to the codes input. Data Sheet PDF Manual PDF To Top of Page

		3185E DTMF Decoder The Model 3185E Dual Tone Decoder is a microprocessor controlled DTMF decoder. The 3185E is capable of accepting a sequence of one to four DTMF® signals, and responds by activating it’s 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 the PC board. Data Sheet PDF Manual PDF To Top of Page

		3223B Encoder Controller The 3223B Encoder Controller is a plug-in, 3 “ X 5” circuit card designed to convert a momentary logic input into a 4-line parallel BCD logic output. The 3223B is used with the 3171B, containing special programming, to generate four 4-digit DTMF codes from four independent momentary logic inputs. Data Sheet PDF Manual PDF To Top of Page

		3223C Encoder Controller The 3223C Encoder Controller is a plug-in circuit card designed to convert a momentary logic input into a 4-line parallel BCD logic output. The 3223C is used with the 3171B, containing special programming, to generate four 4 digit DTMF® codes from four independent momentary logic inputs. Data Sheet PDF To Top of Page

		3446A A/V Switch The 3446A Audio/Video switch is a plug-in circuit card designed for 2x1 Audio follow video or IF/RF switching. The 3446A is operated by a contact closure to ground. When the actuate line of the 3446A is connected to circuit common, the switch will energize for the duration of the switch closure. Data Sheet PDF To Top of Page

		90417 Dial Tone Detection Module Monroe’s 90417 Dial Tone Detector is designed to be used with, and plug directly into, the Model 3137B – Unattended Answering Device. The 90417 is intended for use on telephone exchanges where the central office does not provide a current interruption on the calling party disconnection. By using the 90417, central office supervisory dial tone will force the 3137B to disconnect. The 90417 monitors telephone audio for continuous dial tone, at 350 Hz and 440 Hz. After detecting continuous dial tone for more than eight seconds, the 90417 will reset the 3137B, disconnecting it. No other functions are altered on the 3137B Unattended Answering Device when the 90417A Module is installed. Data Sheet PDF To Top of Page

Monroe Electronics Inc., 100 Housel Avenue, Lyndonville, NY 14098 phone:1-585-765-2254 fax:1-585-765-9330 Copyright © 1999-2007 Monroe Electronics, Inc.

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