VSCOM NetCom Plus 111, User Manual

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8 IP Modem Function
8.4.1.3 Non-AT commands
All these commands apply in Command Mode. If a Dial command
or an ATA succeeds with a CONNECT, the IP Modem is in data mode. Every data received on
the serial port is sent to the other station/IP Modem. And there is a special character sequence
in Data Mode, which changes back to Command Mode. This sequence is ‘+++’ by default, with
an interval of 1 second before and after this command; the three characters must appear in one
second.
8.4.2 S-Registers for Configuration
Traditional there is a set of registers to control certain operations. These registers are controlled
via the AT S-command mentioned above. This is a list of those supported by IP Modem.
Reg. Function Range/units Default
S0 Auto-Answer Ring 0-255 0 (no Auto-Answer)
S1 Ring Counter 0-255 0 (read only)
S2 Escape Code 0-127 (ASCII) 43 (= "+" for "+++")
S3 Carriage Return 0-127 13
S4 Line feed 0-127 10
S5 Backspace 0-32, 127 8
S8 Comma pause 0-255 (seconds) Accept but ignore
S9 Carrier detect response time 1-255 (0.1 sec) 6
S12 Escape Guard time 20-255 (0.02 sec) 50 (= 1 second)
S25 DTR Ready Delay 0-255 (0.01 sec) 5 (= 50 msecs)
S26 RTS to CTS Delay 0-255 (0.01 sec) 1 (= 10 msecs)
S30 Disconnect Timer 0-90 (seconds) 0 (read only, AT\Tnn)
Table 22: IP Modem S-Registers for Configuration
S0 is frequently used to configure a modem to auto answer incoming calls. S1 may be checked by
software if S0 is Zero, i.e. no Auto-Answer. S2 may be set to a different character, if the ‘+++’
may happen in typical data. Otherwise the software must insert a pause in the transmission.
8.4.3 Sample Commands used by Windows
The NetCom
+
IP Modem is intended for manual installation as kind of a "Standard Modem" in
Windows. The reference is the MDMGEN.INF file. The commands used in that file are:
"AT&F", "ATA", "ATH", "AT &F E0 V1 &C1 &D2 S95=47 S0=0<cr>", "ATS0=0<cr>", "ATX4",
"ATS7=<#>", "AT%C", "AT\N", "AT&K", "ATS30=<#>", "ATB", "ATDP", "ATDT", "ATL", "ATM"
8.5 Description of AT–Commands
The commands are listed more or less in a functional grouping. Configuration commands are listed
also with their default settings in brackets.
September 2016 NetCom Plus User Manual 99