Funciones por DTMF para Echolink

Estos tonos nos otorgarán cientas de funciones programables para nuestro EchoLink -L o -R  de forma totalmente remota

El material presentado a continuación es copia fiel del site de Echolink, podrán encontrar los links al final del articulo.


Items on the DTMF tab list each of the functions EchoLink supports by entering DTMF (a.k.a. TouchTone) commands over the local link, or a secondary link receiver.   DTMF commands may be used to activate or de-activate the link, or to connect or disconnect a distant station.

DTMF Decoder:  Select one of the three options, depending on your equipment set-up.

External:  Select this option if you are using a WB2REM or VA3TO interface board, or equivalent.  These interfaces have an on-board DTMF decoder which communicates with EchoLink over the serial port.

Internal:  Select this option if you are using another type of interface, such as a RIGblaster.  When this option is selected, EchoLink itself detects DTMF tones as they are received at the PC’s sound input, using digital signal-processing techniques.

Disabled:  Select this option if you do not wish to accept DTMF commands.  When this option is selected, none of the items in the DTMF Command list will be available.

Min Interdigit Time:  Sets the minimum amount of time, in milliseconds, that EchoLink will allow between incoming DTMF digits.  Set this to 0 for the default timing.  Set this to a higher value (such as 200 or 500 ms) if you find that noisy signals are causing single digits to be interpreted as multiple digits.

Log All Commands:  When this box is checked, EchoLink will log all DTMF sequences that are received, even those which do not trigger a function.  These entries will appear in the System Log.

Auto Mute:  When this box is checked, EchoLink will suppress DTMF signals (received over the local link) from going to the remote station over the Internet.  DTMF signals are suppressed completely if the Internal decoder is used; when using the External decoder, the first part of the first digit may “sneak” through.

Disable During PTT:  When this box is checked, DTMF signals are not decoded while the local link transmitter is keyed.  In some audio configurations, audio from the sound card might be fed into either the internal decoder or an external decoder.  This can cause DTMF signals received over the Internet to be interpreted by EchoLink’s decoder, which may be undesirable.

Enable Remote Pad:  When this box is checked, stations connecting to your link using EchoLink version 1.6 or above can send DTMF commands to (or through) your link radio using the program’s built-in DTMF encoder pad.  Enable this feature if there are DTMF-controlled repeater or remote-base functions you wish to provide to remote users.  The remote user’s DTMF pad is not available if either node is participating in a conference.

Note that EchoLink’s built-in DTMF decoder itself does not normally respond to signals received over the Internet; however, certain audio configurations may cause this to happen if they allow the sound card’s output to be fed into its input, or to an external DTMF decoder. 

Also note that this setting controls only the ability of the remote user to use EchoLink’s built-in DTMF pad.  It does not affect DTMF signals from other sources.

Advanced:  When using the Internal DTMF decoder, opens a window which allows the frequency tolerance, “twist”, and signal-to-noise ratio to be adjusted.  If you have difficulty getting DTMF digits to decode reliably with the Internal decoder, you may find that adjusting these settings, particularly the frequency tolerance, will help.  However, you may wish to try lowering the audio level of the receiver first.

DTMF Command List:   The list shows the name of each DTMF command and the sequence of digits that is required to activate it.  To change any of the function sequences, click on the appropriate entry in the Sequence column and edit it.  To disable a function, leave the item in the Sequence column blank, or replace it with the letter X.

Reset to Defaults:  Returns all DTMF function codes to their default values.  This also adds any new function codes which may have been added since a previous version of the software.

Dead-Key Prefix:  Some repeater controllers have a feature that mutes DTMF tones so that they are not heard on the output. Typically, however, these controllers provide a work-around in the form of a prefix that can be used to disable the DTMF muting feature (such as #). If you are running a link to such a repeater, and receiving audio from the repeater’s output, users wishing to send EchoLink DTMF commands will have to prefix all EchoLink commands with this sequence. 

In some cases, however, EchoLink receives and decodes this command prefix along with the command itself, which is usually not desirable. To avoid this problem, enable the Dead-Key Prefix option. This will cause EchoLink to always ignore the chosen command prefix, unless it is the only digit received.

Station Shortcuts:  Opens the Station Shortcuts window.  This window allows you to create custom DTMF sequences for connecting to specific stations, like a personal phone book.  For example, you could create the shortcut 99 to connect to K1RFD.  This makes it easier for mobile stations to connect to a frequently-used station without having to memorize the station’s node number.  Be sure to use sequences that do not conflict with other functions; two- or three-digit sequences are usually good choices.  Note that Station Shortcuts are implicit “connect” commands, not simply abbreviated node numbers.

For more information about DTMF commands, see DTMF Functions.

DTMF Functions

In Sysop mode, EchoLink can be configured to accept commands through the local receiver using DTMF tones (TouchTones).  These commands are used to enable or disable the link, or to connect or disconnect a station on the Internet.

Each command consists of a sequence of digits (or the special keys *, #, and A through D).  Although a set of default sequences is assigned to each function, any sequence can be customized using the DTMF tab of the Sysop Settings page.

The table below lists each of the DTMF commands.

Note: If you have upgraded from an earlier version of EchoLink, you may need to choose “Reset to Defaults” to make all of the following commands available.

Command Description Default
Connect Connects to a station on the Internet, based on its node number. num
Connect by Call Connects to a station on the Internet, based on its callsign. C+call+#
Random Node Selects an available node (of any type) at random, and tries to connect to it. 00
Random Link Selects an available link or repeater (-L or -R) at random, and tries to connect to it. 01
Random Conf Selects a conference server at random, and tries to connect to it. 02
Random User Selects an available single-user station at random, and tries to connect to it. 03
RandomFavNode Selects an available node (of any type) at random from the Favorites List, and tries to connect to it. 001
RandomFavLink Selects an available link or repeater (-L or -R) at random from the Favorites List, and tries to connect to it. 011
RandomFavConf Selects a conference server at random from the Favorites List, and tries to connect to it. 021
RandomFavUser Selects an available single-user station at random, and tries to connect to it. 031
Disconnect Disconnects the station that is currently connected.  If more than one station is connected, disconnects only the most-recently-connected station. #
Disconnect All Disconnects all stations. ##
Reconnect Re-connects to the station that most recently disconnected. 09
Status Announces the callsign of each station currently connected. 08
Link Down Disables EchoLink (no connections can be established). (none)
Link Up Enables EchoLink. (none)
Play Info Plays a brief ID message. *
Query by Call Looks up a station by its callsign, and reads back its node number and status. 07+call+#
Query by Node Looks up a station by its node number, and reads back its callsign and status. 06+num
Profile Select Switches to a different stored set of configuration settings (0 through 9). B#+num 

Listen-Only On Inhibits transmission from RF to the Internet. 0511
Listen-Only Off Restores normal transmission from RF to the Internet. 0510


The default for the Connect command is to simply enter the 4- 5-, or 6-digit node number to which you wish to connect.  To prevent interference with other DTMF functions, however, you may wish to configure a special prefix, such as A or 99.

Link Up and Link Down

No defaults are provided for these functions.  To enable these functions, enter a DTMF sequence for each one, using the DTMF tab of the Sysop Settings page.

Profile Select

Profiles are numbered from 0 to one less than the number of profiles shown under File->Profiles.  Profile 0 is always MAIN.

Station Shortcuts 

Custom DTMF commands can be created to connect to specific stations. These commands are called Station Shortcuts, and are not shown in the table above. To manage your Station Shortcuts, click the Station Shortcuts button on the DTMF tab of Sysop Settings.

Entering Node Numbers

To enter a node number (for the Connect or Query by Node commands), enter the 4-, 5-, or 6-digit node number.  If the specified node is not among the stations currently logged on, EchoLink will say “NOT FOUND”.

Entering Callsigns

To enter a callsign (for the Connect by Call or Query by Call commands), press two digits for each letter and number in the callsign.  The first digit is the key on which the letter appears (using 1 for Q and Z), and the second digit is 1, 2, or 3, to indicate which letter is being entered.  To enter a digit, press the digit followed by 0.  When finished, end with the pound key (#).

For example, the letter “K” is entered as “52”, the letter “Q” is entered as “11”, and the digit “7” is entered as “70”.

Callsigns need not be entered in full.  If a partial callsign is entered, EchoLink will find the first match among the stations currently logged on.  If no match is found among the stations currently logged on, EchoLink will say “NOT FOUND”.


(These examples assume that the default DTMF codes are configured.)

  • To connect to node number 9999:

Enter:  9 9 9 9

EchoLink responds with:


followed by


because 9999 is the node number of conference server “*ECHOTEST*”.

  • To get the status of K1RFD:

Enter:  0 7 5 2 1 0 7 2 3 3 3 1 #

EchoLink responds with:

“K-1-R-F-D 1-3-6-4-4 BUSY”

because 13644 is the node number of station K1RFD, and K1RFD is currently busy.

  • To connect to a random link or repeater:

Enter: 0 1

EchoLink responds with:


followed by


because K1OF-R was selected at random.

Cuenten sus experiencias!

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