San Telequip 232 User manual

San Telequip (P) Ltd.,
504, 505 Deron Heights, Baner Road,
Pune 411 045, India.
Phone: [phone] Connecting. Converting. Leading !
Email: [e-mail] .
Document Name : User Manual for GSM/GPRS modem 232/485.
INTRODUCTION
GSM/GPRS modem is a multi-functional, ready to use, rugged unit that can be embedded or plugged
into any application. The modem can be controlled and customized to various levels by using the
standard AT commands. The modem is fully type-approved, it can speed up the operational time with
full range of Voice, Data, Fax and Short Messages (Point to Point and Cell Broadcast). The modem
also supports GPRS (Class 12) for spontaneous data transfer.
Features
•Quad Band 850/ 900/ 1800/ 1900 MHz
•Output power 2W for GSM 850/ 900, 1W for GSM 1800 /1900
•Control via AT commands (GSM 07.07 and 07.05)
•Interface-RS232 (DB9 female connector) or RS485 (3 pin screw type connector).
•Coding Scheme: CS1 to CS4
•CSD up to 14.4 kbps(Non-transparent)
•Mobile Originated (MO) and Mobile Terminated (MT),Cell Broadcast(CB),Text and PDU
mode.
•Supports Internet service protocols TCP/UDP/FTP/HTTP/MMS
•Supports Packet Switched Broadcast Control Channel(PBCCH)
•Supports PAP protocol and USSD
•Supports auto-bauding for serial port from 4800 bps to 115200 bps.
•LED Indication for Power ON, Network status, Tx and Rx
•Dimensions: 93 x 78 x 33 mm ( excluding connectors)
•Weight: 125 grams
•Housing: Metallic Enclosure
Installing the Modem
To install the modem, plug the device on the provided SMPS Adapter.
Inserting/ Removing the SIM Card
To insert or remove the SIM Card, it is necessary to press the SIM holder ejector button with sharp
edged object like a pen or a needle. When this is done the SIM holder comes out a little, then pull it
out and insert or remove the SIM Card. Place the SIM card properly as per the direction of the
installation. It is very important that the SIM is placed in the right direction for its proper working
condition.
Connecting External Antenna
Connect GSM/GPRS modem to the external SMA antenna male end. The frequency of the antenna
should be set to GSM850/900/1800/1900. The right Antenna should be used with the specified
frequency or else the antenna can damage the modem or it can affect the communication.
Power Supply – Screw type connector with 9-30V DC, 2A supply.
Modem connection to external devices:
Connectors
Connector
Function
SMA RF antenna connector
9 pin D-SUB / 3 pin screw type RS232 link / RS485 link
Adaptor Socket Power supply connector
SIM card holder SIM card

San Telequip (P) Ltd.,
504, 505 Deron Heights, Baner Road,
Pune 411 045, India.
Phone: [phone] Connecting. Converting. Leading !
Email: [e-mail] .
LED Indicators
Network status/GPRS connectivity, Power ON, Tx and Rx status while data transmission.
RS232 Cable details
9 – PIN D-SUB Female Connector
PIN
NAME
Designation
Type
1
NC - -
2
Tx Transmit Data Input
3
Rx Receive Data Output
4
DSR Data Set Ready Output
5
GND Ground Ground
6
DTR Data Terminal
Ready
Input
7
CTS Clear to send Output
8
RTS Request to
send
Input
9
NC - -
9- PIN Serial Male to Female Cable Details
RS485 Cable details
3 pin screw type connector
PIN
NAME
1
D+
2
D-
3
GND
TROUBLESHOOTING:
Q. The modem does not answer through the serial link
A) Check Power input of the modem
B) Check for proper connections as given in PIN DETAILS section of User manual
C) Check for communication port is properly configured.
The factory setting for the baud rate is 9600 bps.
D) Close any other application running on the port that you are using for modem
Q) The modem always returns «Error» when trying to issue a communication
Issue AT+CMEE=1 to have extended error code and retry
9 Pin male side 9 Pin female side
RX
TX
DSR
GND
DTR
CTS
RTS
TX
RX
DTR
GND
DSR
RTS
CTS

San Telequip (P) Ltd.,
504, 505 Deron Heights, Baner Road,
Pune 411 045, India.
Phone: [phone] Connecting. Converting. Leading !
Email : [email protected]m
Modem basic operation
(A) Modem connection with Hyper Terminal
1) Open Hyper Terminal from All Programs Accessories Communications
1) Establish Connection-
2) Setting up usage port-

San Telequip (P) Ltd.,
504, 505 Deron Heights, Baner Road,
Pune 411 045, India.
Phone: [phone] Connecting. Converting. Leading !
Email : [email protected]m
3) Setting up Port Parameters-
4) Setting up Property in File menu of Hyper Terminal

San Telequip (P) Ltd.,
504, 505 Deron Heights, Baner Road,
Pune 411 045, India.
Phone: [phone] Connecting. Converting. Leading !
Email : [email protected]m
2) Testing of basic AT commands -
Type “AT” word and press “ENTER” key. You should get response as “OK”. Means modem is
connected properly.All Commands are executed by pressing ENTER Key.
Follow following sequence of AT commands-

San Telequip (P) Ltd.,
504, 505 Deron Heights, Baner Road,
Pune 411 045, India.
Phone: [phone] Connecting. Converting. Leading !
Email : [email protected]m
For sending SMS use following AT commands.
Also type “ctrl z” to send message.
For more AT commands or details, see AT commands manual.
(B) GPRS INTERNET Access-
Given below is the procedure for connecting GSM modem to a PC and establishing a GPRS
connection to the internet through standard “Dial-up-networking”
Double click the “Phone and Modems Options” in “Control Panel”.
Double click the “Phone and Modems Options” icon.
Select the “Modems” tab.
Click the “Add…” button at the bottom of the menu
Make sure the “Don’t detect my modem; I will select it from a list.” Is selected.
Your next screen will ask you which modem you have, Make sure “Standard 9600 bps Modem” is
selected.

San Telequip (P) Ltd.,
504, 505 Deron Heights, Baner Road,
Pune 411 045, India.
Phone: [phone] Connecting. Converting. Leading !
Email : [email protected]m
The next screen will ask you which COM port your Modem is connected to.
Select COM port to which modem is connected as shown above and press Next>
You will then be greeted with a message saying “Your modem has been set up successfully”.
Press “Finish”
Select your Modem from the list in your “Phone and Modems Options” and click the “Properties“
button.
A new window will appear as shown below.

San Telequip (P) Ltd.,
504, 505 Deron Heights, Baner Road,
Pune 411 045, India.
Phone: [phone] Connecting. Converting. Leading !
Email : [email protected]m
You can choose “Diagnostics” to test your modem to ensure you have selected appropriate COM
port.
Click on “Advanced” Tab and enter the setting as shown below
Please note that you have to obtain APN(Access Point name) from your cell phone provider to
replace “INTERNET” value in above settings.
You Can then establish a Dial up networking connection as following-
1. Double click “My Network places” icon.
2. Select “View My Network Connections”
3. Select “Add a new Network connection”

San Telequip (P) Ltd.,
504, 505 Deron Heights, Baner Road,
Pune 411 045, India.
Phone: [phone] Connecting. Converting. Leading !
Email : [email protected]m
You have to dial number as “*99#”.
Select Properties in above box.
Select appropriate modem and press Dial.
After successful configuration Modem gets connected to GPRS and following message get displayed

San Telequip (P) Ltd.,
504, 505 Deron Heights, Baner Road,
Pune 411 045, India.
Phone: [phone] Connecting. Converting. Leading !
Email : [email protected]m
(C) Data transfer between two GSM MODEMS
Setup Diagram –
•Connect the GSM modems to serial COM ports of two different PCs.
•Put the “Data Mode” activated SIM card in SIM card holder of both modems.
•Power on the both modems, wait till the time network ‘LED’ on the modem starts
blinking slowly .Use following AT commands to activate the data call between these
two modems.
First check basic AT commands.
For Auto answering, issue the command ATS0=2 on PC 2 , so the modem
will answer the call after two rings.
For Data call use AT command ATDXXXXXXXXXX – Modem will generate
data call form PC1.where XXXXXXXXXX is the sim card number in second
modem.
“Connect 9600” message will appear on both hyper terminals indicating data
call has started.
Now type the data on hyper terminal of PC1, it should be appear on another
hyper terminal of PC2.
•You can transfer files between two hyper terminals using this setup.
PC
1
with
serial COM
port
GSM
Modem
GSM
Modem
PC 2 with
serial COM
port
Serial Cable
GSM
Network
Serial Cable