Telephone: 08 9370 5533 -
International: +61 8 9370 5533

Click here to go to our home page Send us an e-mail spacer SC2 Selcall/Telcall Microphone SC12 Aircraft unit SC51 Internal vehicle tracking/selcall unit SC90 Selcall unit for Kenwood TK-90 radios CM1 Replacement mic for Codan 9323 CM2 Replacement mic for Codan 9323 DM1 DTMF Keypad microphone CWID1 Repeater/Beacon controller DT8 DTMF controlled relay unit FA1 Fleetsync controlled interface unit spacer Download manuals here Spares Download schematics here Find radio modifications here

We now accept payments via:
Acceptance Mark
Click for more info


Definition: Selcall
Definition: Telcall

DT8R - DTMF controller board (relay)
DT8T - DTMF controller board (transistor)



Programming commands

Below are listed the various programming commands for the DT8 DTMF controller board. All commands are entered using a DTMF keypad or a standard touch-tone telephone (not supplied).

To enter programming mode remove power from the DT8, close the programming link, and reapply power to the DT8 board. On power up three beeps will be heard from the piezo alarm - the DT8 is now in programming mode.

After programming the DT8 to your requirements turn off the power, remove the programming link and then reapply power. The DT8 is now ready for use.

Determine how you want to programme the DT8 using the tables below. For instance if you want to programme relay 5 to use pulse mode with a pulse of 4.7 seconds then the programming sequence would be * 5 1 4 7 #. Or if you wanted relay 5 to use latch mode and to be operated on power up then the sequence would be * 5 2 0 1 #.

When entering the programming sequence the piezo will beep to indicate progress as follows:

1) after pressing the * key three beeps will be heard to indicate the beginning of the sequence
2) each valid digit key will produce a single beep
3) after pressing the final # key three beeps will be heard to indicate the acceptance of the sequence this is followed by a brief silence and then three more beeps to indicate ready
4) if a wrong key is pressed during the sequence a long error beep will be heard followed by a brief silence and then three more beeps to indicate ready, any previous setting is unaffected.

Note:
There is no time out period between key presses.
A sequence may be aborted by pressing the * key.

Follow Mode

* N 1 #
or
* N 1 0 0 #
N = 1 to 8.

comments

Relay N operates when DTMF tone N is received.
Both commands give identical results.

Pulse Mode

* N 1 T T # N = 1 to 8.
TT = Pulse period 0.1 to 9.9 Seconds in 0.1 second steps.
comments

When DTMF tone N is received relay N operates and stays operated for the length of the programmed pulse period.

Latch Mode

* N 2 0 S #
N = 1 to 8.
S = 0 = Relay off at power up.
S = 1 = Relay on at power up
comments
When DTMF tone N is received followed by DTMF * the relay N is operated and stays operated until reset with N #.
Note: Any relay can be programmed to operate on power up or restart

Exclusive Mode

* N 2 1 S # N = 1 to 8.
S = 0 = Relay off at power up.
S = 1 = Relay on at power up
comments

Any or all relays can be in the exclusive list. When tone N is received relay N is operated and all other relays in the exclusive list are released. Only one relay in the exclusive list can be operated at any one time.
Note: Any relay can be programmed to operate on power up or restart

Set/Reset All

* 0 1 #
or
* 0 1 0 0 #

Set All and Reset all disabled
Both commands give identical results.
* 0 1 S R #

S = 0 = Set All disabled
S = 1 = Set All enabled
R = Reset mode as follows:
0) Disabled - command ignored
1) Reset All - command resets all relays to the unoperated condition
2) Soft Restart - command sets all relays to the power up condition
3) Hard Restart - command restarts the DT8 software as a power up reset.

Lock code

* * N N # Where NN means between 1 and 8 digits (DTMF numbers 0 to 9, letters A to D)
* * # No lock code set - cannot lock unit
comments When the DT8 receives a valid lock code it cannot be activated by any more commands until after it has received a valid unlock code.

Unlock code

* # N N # Where NN means between 1 and 8 digits (DTMF numbers 0 to 9, letters A to D)
* # # No unlock code set - use lock code as unlock code
comments

The unlock command works in conjuction with the auto-lock feature

Inter-tone timing

* 9 0 #
or
* 9 0 0 0 #

Inter-tone timing disabled
Both commands give identical results.
* 9 0 T T # Inter-tone timing enabled
TT = 0.1 to 9.9 seconds in 0.1 second steps
comments Don't make the timing period too short otherwise you won't have time to send the tones - recommend minimum 05 = 0.5 seconds. When disabled the DT8 will never time out if a command is not completed. If you require a long time between tones then we recommend you set the timer to 99 = 9.9 seconds.

Auto-lock feature

* 9 1 #

Auto-lock disabled

* 9 1 0 0 #

Auto-lock immediate - After receiving a valid unlock code the DT8 will respond to only one command after which it is automatically locked again.
* 9 1 T T # Auto-lock timed - TT = 0.1 to 9.9 minutes in 0.1 minute steps
After receiving a valid unlock code the DT8 will respond to all further commands unless the timer period of inactivity is exceeded, after which the DT8 will not respond to any commands except the unlock command.
comments The auto-lock feature works in conjuction with the unlock command.

Audio Feedback feature

* 9 2 #
or
* 9 2 0 0 #

Audio Feedback disabled
Both commands give identical results.

* 9 2 F S #

Where F = 0, 2 or 3 and S = 0, 2 or 3
F = 0 = No Audio Feedback - in this case the S parameter has no meaning.
F = 2 = Audio Feedback for every tone received
F = 3 = Audio Feedback at the end of each complete command sequence
S = 0 = Audio Feedback immediate - don't wait for radio squelch
S = 2 = Wait for end of radio squelch - squelch active low
S = 3 = Wait for end of radio squelch - squelch active high

comments

If you don't require Audio Feedback then disable it (make F = 0) - otherwise it slows down operation of the unit.
If F is set to 0 (No Audio Feedback) then the S parameter has no meaning.
Use the squelch options (S = 2 or 3) if using a simplex radio link. Use the S = 0 immediate option if using a full duplex radio link or a harwdwired connection.
When Audio Feedback is enabled the DT8 can be used to PTT a radio transmitter

Access codes

* 9 3 # Individual Access code disabled
* 9 3 A A #

Individual Access code enabled - AA = digits 0 to 9 or Alpha A to D
When set the unit requires to see the address AA before any command. The unit needs to be unlocked for addressing to work.

* 9 4 # Group Access code disabled
* 9 4 A A #

Group Access code enabled - AA = digits 0 to 9 or Alpha A to D
When set the unit requires to see the address AA before any command. The unit needs to be unlocked for access to work. Audio Feedback is not generated.
Any number of units may share a Group Address.

* 9 5 # Allcall Access code disabled
* 9 5 A A # Allcall Access code enabled - AA = digits 0 to 9 or Alpha A to D
When set the unit requires to see the access code AA before any command. The unit needs to be unlocked for access to work. Audio Feedback is not generated.
Any number of units may share the Allcall Access code. The Allcall Access code may be used as a secondary Group Access code if required.
comments

Audio feedback (if enabled) only works with Individual Access codes and is restricted to Command Completion, Lock and Unlock codes

Click here for the DT8R/DT8T manual



Jenal Communications design and manufacture a wide range of radio related devices including units which use the standard HF selcall and telcall signalling as used by Barrett, Codan, Icom and Q-Mac. Thousands of these products are being used all around the world by Governments, NGOs, Commercial organisations and Amateur Radio operators. We also manufacture a number of devices which use the common DTMF (or touchtone) signalling system.
countercountercountercounter
Last modified: 23 June 2015.