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Appendix C ~ Serial Commands
Technical Services Group ~ 1-800-283-5936 (USA) ~ 1-801-974-3760
DIAL
This command generates DTMF tones. This capability remains active after the call is
placed so tones can be issued for use with voice mail and pagers.
Command form:
DIAL
<STRING>
Explanation
STRING is any valid combination of touch tone characters. A comma
indicates a two-second pause. STRING has a maximum length
of 15 characters. Valid characters are 0 through 9, A through
D, *, # and “,”.
Return values
DIAL returns the dialed string of numbers. For example, the following command
dials the number 801-975-7200: DIAL 9,8019757200 A “9” and a pause are
generated to get an outside line on a PBX. The following is returned out the serial
port: DIAL 9,8019757200
EC
This command changes or reports back the state of the echo canceller.
Command form:
EC
<X>
Explanation
Value 0= Sets the state to Off
1 = Sets the state to On
Null = Returns the current state
Return values
The command will return the updated condition (On=1, Off=0) of the echo canceller
in the same format as the command.
ERL
This command reports back the echo return loss (ERL) in dB.
Command form:
ERL
Return Values
The command will return the ERL in the same format as the command (ERL 20).
ERLE
This command reports back the echo return loss enhancement (ERLE) in dB.
Command form:
ERLE
Return values
The command will return ERLE in the same format as the command (ERLE 20).