Endress+Hauser memo-graph Version II Betriebsanleitung Seite 92

7. Serial interfaces/Modem
Example for dial
selection command
90
Tone dial, from an extension into the public telephone network, line selection with 0
Pulse dial, from an extension into the public telephone network, line selection with 90
Tone dial, from extension to extension in a closed telephone system
Tone dial, from the main connection to the public telephone network, line selection
with 0
Now enter the telephone number under which the unit connected to the modem can
be reached and start the connection sequence using "OK".
ATDT0W or ATXDT0,,
ATDP90W or ATXDP90,,
ATXDT
ATDT0