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we have an old modem model US Robotics Sportster Flash and we'd need to use it to open a door in our organization, by making a phone call to an internal number (say, 101).
We are running on an Ubuntu based machine and we are trying to set up a single command to be executed (from command line) to make the phone call. Such call should be interrupted by the client after a few seconds, in order to avoid a busy line.
We've tried using minicom software version 2.5 (the modem is accessible through /dev/ttyS0 device), executed through the minicom -s on command.
It follows our attempt to make the phone call.
AT S7=45 S0=0 L1 V1 X4 &c1 E1 Q0
OK
AT
OK
ATD101
NO DIAL TONE
ATDT101
NO DIAL TONE
ATD,101,
DIALING DISABLED
Although connections at the physical layer is ok, we are getting the NO DIAL TONE error.
In any case, our final attempt would involve a Python script using the serial library.
How can we solve that?
auino
Posted 2017-03-21T09:30:08.940
Reputation: 121
Do you get a dial tone when plugging a normal phone to the phone line the modem is connected to? – Tero Kilkanen – 2017-03-21T11:57:00.333
Yes. Moreover, if I receive a phone call on the modem line, I get a
RINGmessage fromminicom. – auino – 2017-03-21T12:33:58.543Have you tried a different model modem to rule out hardware problems? – user1686 – 2017-03-21T12:38:29.607
You verified that you have dialtone with an old school analog phone, right? – Jim B – 2017-03-21T12:40:36.113
By the way regarding writing a python script, this is not needed. Unless you want to reinvent the wheel, you can use my atinout program to send AT command to a modem from the command line. It is specifically written to cover use cases like this.
– hlovdal – 2017-03-21T16:46:02.567