Applies To:
  • CitectSCADA 1.00 1.01 1.10 1.11 1.20 2.00 2.01 3.00

My pager service is numerical only, and requires me to ring up and enter choices with my phone to select options for paging after listening to a recorded message, and also requires me to enter my numerical message with the buttons on the phone, can I use my modem instead? 

Certainly. if you time the pauses where the paging service is talking to you about your choices, you can work out when you can send your command by modem.

Because your modem will ring, then hang up if it cannot connect to another modem, you must be a little tricky.

Dial the paging service using ATDT xxx-xxxx; the semi-colon is important, it tells the modem to drop back into command mode and do another command.

Now you can issue tones down the line as many times as you want using ATDT commands as long as you put a semi-colon after the number(s).ie ATDT1; to send a tone for 1 down the line.

The last time you want to send tones, leave off the semi-colon and the modem will send the tone then hang up (because of no carrier).

You could automate this quite easily in cicode by using ComWrite to send the ATDT command to the modem, with sleep(seconds) to wait until the correct time.