ATD <phone #> problems

[terka]

atd command

Hi

1.- Ericsson r520
2.- DRS-11 data cable (serial com port) conected on PC
3.- WinXP Hyperterminal software


I make a call using: " ATD <phone number><CR>" ====> its working very well

When call is on, then I try to send DTMF using: " AT+VTS=<DTMF> "


But when a put the "A" character in hyperterminal the call terminates, and i can´t send the tone what i wich.

This is incorrect operations or ist normally?


I hope you cooperations

Thank you


Bye

Added after 1 hours 51 minutes:

Hi

The answers is:

atd<#>;<CR> ======> working with ";"

after;
at+vts="0" =====> working when call is on



WOW


the ";" character was the problem....however, without ";" the call is successful too, but the call drops when press any key in hyperterminal...


Its easy send this command to cell phone from a PIC 16f84, and my project is remote control with SMS and DTMF....some times sms delivery is very slow...In fact, DTMF is faster and reliable......

Bye

 

[gidimiz]

at command atd

Hi terka,

If you will read in the AT command set, you will see this:

Dn Dial
This command instructs the modem to begin the dialing sequence. The dial string (n, including modifiers and the telephone number) is entered after the ATD command.
A dial string can be up to 40 characters long. Any digit or symbol (0¾9, *, #, A, B, C, D) may be dialed as touchtone digits. Characters such as spaces, hyphens, and parentheses do not count - they are ignored by the modem and may be included in the dial string to enhance readability.
The following may be used as dial string modifiers:
L Redials last number. Should be the first character following ATD, ignored therwise.
P Pulse dialing.
T Touch-tone dialing (default).
, Pause during dialing. Pause for time specified in Register S8 before processing the next character in the dial string.
W Wait for dial tone. Modem waits for a second dial tone before processing the dial string.
V The modem switches to speakerphone mode and dials the number. An ATH command may be used to disconnect the voice call.
@ Wait for quiet answer. Wait for five seconds of silence after dialing the number. If silence is not detected, the modem sends a NO ANSWER result code back to the user.
! Hook flash. Causes the modem to go on-hook for 0.5 seconds and then return to off-hook.
; Return to command mode. Causes the modem to return to command mode after dialing the number, without disconnecting the call.
^ Disable data calling tone transmission.
S=n Dial a telephone number previously stored using the &Zn=x command (see the &Zn=x command for further information). The range of n is 0—3.
$ Bong tone detection.

So here you can find your asnwer why ; was working.

Good luck.

 

[terka]

atd dial

Hi

The asnwer is:

; Return to command mode. Causes the modem to return to command mode after dialing the number, without disconnecting the call.



Can you send o tell us where you found that explanation about AT command??

Thank you very much

 

[gidimiz]

atd at command

Hi,

I traid to search on the net for this file, and i couldnt find any referance, so here it is...

Also, I found this in my links and it is still working...
https://www.modemhelp.net/basicatcommand.shtml

Good luck.