User`s manual
Table Of Contents
- 1. Introduction
- 2. Getting Started
- 3. Initial IP Address Configuration
- 4. Introducing Serial Port Operation Modes
- 5. Introducing OnCell Central and Ethernet Operation Modes
- 6. Using the Web Console
- 7. Cellular Network Settings
- 8. Configuring Serial Port Operation Modes
- 9. Configuring the Cellular-Enabling Ethernet Device
- 10. Configuring OnCell Central Management Software
- 11. Additional Serial Port Settings
- 12. System Management Settings
- 13. Software Installation/Configuration
- A. Pinouts and Cable Wiring
- B. RFC2217
- C. Dynamic Domain Name Server
- D. Well Known Port Numbers
- E. Auto IP Report Protocol
- F. GSM Alphabet
- G. Default Settings

OnCell G3111/G3151/G3211/G3251 Series User’s Manual Serial Port Operation Modes
8-19
ATS0≧1:
The OnCell G3111/G3151/G3211/G3251 will accept the TCP connection immediately and then
send the “CONNECT baud” command to the serial port, in which baud represents the baudrate of
the OnCell G3111/G3151/G3211/G3251’s serial port. After that, the OnCell
G3111/G3151/G3211/G3251 immediately enters data mode.
Dial-out
The OnCell G3111/G3151/G3211/G3251 accepts the AT command “ATD IP:TCP port” from the
serial port and then requests a TCP connection from the remote Ethernet Modem or PC. Here IP is
the IP address of the remote Ethernet modem or PC, and TCP port is the TCP port number of the
remote Ethernet modem or PC. Once the remote unit accepts this TCP connection, the OnCell
G3111/G3151/G3211/G3251 will send out the CONNECT baud” signal via the serial port and then
enter data mode.
Disconnection request from local site
When the OnCell G3111/G3151/G3211/G3251 is in data mode, the user can initiate disconnection
by sending “+++” from the local serial port to the OnCell G3111/G3151/G3211/G3251. Some
applications allow you to set the DTR signal to off, which will also initiate disconnection. The
OnCell G3111/G3151/G3211/G3251 will enter command mode, and after 1 second, you can then
enter ATH to shut down the TCP connection. The OnCell G3111/G3151/G3211/G3251 will return a
NO CARRIER via the serial port.
NOTE
The “+++” command cannot be divided. The “+” character can be changed in register S2, and the
guard time, which prefixes and suffixes the “+++”
in order to protect the raw data, can be changed
in register S12.
Disconnection request from remote site
After the TCP connection has been shut down by the remote Ethernet modem or PC, the OnCell
G3111/G3151/G3211/G3251 will send the NO CARRIER signal via the serial port and then return
to command mode.
AT Commands
The OnCell G3111/G3151/G3211/G3251 supports the following common AT commands as used
with a typical modem:
No.
AT command
Description
Remarks
1
ATA
Answer manually
2
ATD <IP>:<Port>
Dial up the IP address : Port No.
3
ATE
ATE0=Echo OFF
ATE1=Echo ON (default)
4
ATH
ATH0=On-hook (default)
ATH1=Off-hook
5
ATI, ATI0, ATI1, ATI2
Modem version
reply “OK” only
6
ATL
Speaker volume option
reply “OK” only
7
ATM
Speaker control option
reply “OK” only
8
ATO
On line command
9
ATP, ATT
Set Pulse/Tone Dialing mode
reply “OK” only
10
ATQ0, ATQ1
Quiet command (default=ATQ0)
11
ATSr=n
Change the contents of S register
See “S registers”