Ritron LM-DTMF Programming Instructions

Publication No. 14500061
Ritron model LM-DTMF is a factory installed DTMF decoder for the Loudmouth™ Wireless PA System receiver. With an
LM-DTMF installed, the Loudmouth
speaker. After the DTMF code has been successfully decoded, the PC programmable Two-Tone Reset Time sets the
length of time the Loudmouth
access. Factory default Two-Tone Reset Time is 5 seconds.
NOTE: The Loudmouth
decoder is installed.
The LM-DTMF can be programmed for up to 15 DTMF characters (0-9, * and # signs) to create a unique Loudmouth
access code. The decoder has been programmed for code 1-2-3 from the factory. The LM-DTMF decoder can be
programmed by two methods, using a DTMF Touch-Tone telephone or over–the-air programming using a DTMF equipped
radio that operates on the Loudmouth

Programming the LM-DTMF with a DTMF Touch-Tone Telephone

1. Remove the Loudmouth
2. Put the Loudmouth
3. Plug a Touch-Tone telephone into the RJ-11 jack on the LM-DTMF decoder board.
4. Place the LM-DTMF program jumper into position 2 (refer to the illustration below).
5. Press the red Program Button on the LM-DTMF board. The red LED indicator light will turn off.
6. Enter the DTMF code (up to 15 characters) using the keypad of the Touch-Tone telephone. The red LED will flash
each time a DTMF character is entered.
7. Press the red Program Button on the LM-DTMF board. The red LED indicator light will turn on.
8. Press the Program Enter button on the Loudmouth
9. Place the LM-DTMF program jumper back into position 1 (refer to the illustration below).
Programming the LM-DTMF over –the-air with a DTMF equipped radio
1. Remove the Loudmouth
antenna should be connected to the Loudmouth
2. Be sure the LM-DTMF program jumper is in position 1 (refer to the illustration below).
3. Press the red Program Button on the LM-DTMF board. The red LED indicator light will turn off.
4. Using your DTMF equipped radio, transmit a signal to the Loudmouth
characters). The red LED will flash each time a DTMF character is received.
5. Press the red Program Button on the LM-DTMF board. The red LED indicator light will turn on.
Program Jumper in Position 2

RJ-11 Programming Jack

* N/O Relay Contacts
LM-DTMF Programming Instructions
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receiver must first receive the programmed DTMF code before it can active the
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receiver can go without receiving a signal before the DTMF code is once again required for
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receiver should NOT be programmed for 2-Tone or Selcall decode when the LM-DTMF
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frequency and tone.
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receiver front cover and apply power using the RPS-1A power supply.
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receiver into Field Programming mode per the instructions in the Loudmouth
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receiver front cover and apply power using the RPS-1A power supply. The AFB-1545
Red LED Indicator
The normally-open relay contacts included on the LM-DTMF decoder board provide a momentary
1-second switch closure whenever the DTMF code is decoded.
Ritron, Inc.
505 West Carmel Drive • Carmel, IN 46032
P.O. Box 1998 • Carmel, IN 46082
Ph: 317-846-1201 • Fax: 317-846-4978
Email:
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receiver to leave field programming mode.
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receiver.
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Program Button
• web: www.ritron.com
ritron@ritron.com
receiver and send the DTMF code (up to 15
Pin 1
Pin 2
Pin 3
Pin 4
Pin 5
* N/O Relay Contacts
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User Manual.
+V BATT
Ground
Audio Input
Decode Output
Unused