Manual

Table 4-4 Default value of S-Registers

Index Default Value Index Default Value Index Default Value

0 ~ 1 0 2 43 3 13

4 10 5 8 6 2

7 30 8 2 9 6

10 14 11 100 12 50

13 ~ 24 0 24 5 25 1

26 ~ 37 0 38 20 39 ~ 99 0

Figure 4-7 Typical case of command/data flow of modem emulation mode

In modem emulation mode, user can also set specific phone number to host address/port mapping

table. If user set the phone number to host address/port mapping table as shown on Figure 4-8, Pro

Series will try to connect to port 7001 of 192.168.1.1 host by the ‘atdt5737772’ command in modem

emulation mode.

2) Parameters

 DTR/DSR behavior

Purpose of the DTR/DSR pin is to control TCP/UDP connection state by using serial port signal. The

DTR is a write-only output signal, whereas the DSR is a read-only input signal in the Pro Series.