Vaisala Hydromet Data Collection Platform - Manual (Page 138)

User's Guide ______________________________________________________________________
136 _________________________________________________________________ M210933EN-C
present. Note that the ones marked with footnote 1 are only for GSM
connection.
With the PSTN modems, it is important that some kind of error
correction is used for the link between modems. For this purpose, the
initialization string for the PSTN modem contains the following
command:
You can combine multiple AT options in the same command, and
separate the commands with <CR> (carriage return) that is entered as \r
in the initialization string.
Table 12 Initialization Strings
String Description
ATV1 Verbose responses, that is, the modem responds
with whole words instead of numbers.
ATE0 Echo off
ATS0=0 Disables modem from automatically answering
incoming calls (to enable answering use option
Answer incoming calls).
AT+CMGF=1
SMS messages in the text mode
1
1. GSM only
AT+CNMI=2,1
Inbound SMS message buffering mode
1
AT\\N2 = Forces LAPM or MNP connection. Failure to obtain a
reliable connection causes the modem to disconnect.
NOTE When a command contains the backslash "\" character, for example,
AT\N2, the backslash must be duplicated in the initialization string.
Otherwise, modem control attempts to interpret \N as a control
sequence, and the command will fail. To make the previous command
work correctly, it must be entered in the initialization string as
AT\\N2.
NOTE The commands sent are not checked. Any errors are indicated by
warnings, and can be viewed in the debug mode, see section
Troubleshooting Modem Operation on page 150 .