For the current model please see the ETM9440-1 3G GSM modem. The FAQ below is for the obsolete Siemens/Cinterion MC35i Terminal.
- Siemens GSM Terminal status LEDs
- SMS Centre Numbers (SMSC)
- Setting up the MC35iT to auto answer a
data call - Free SMS Software for Microsoft customers
- GSM network coverage tests
- Sending and Receiving SMS
- Setting up GPRS
Siemens MC35 (and other models)
GSM Modem Status LEDs
| LED | Status |
| Off | Power off or sleep mode |
| Flashing slowly and evenly | No SIM card inserted, No SIM PIN entered, network search or network login in progress |
| Pulse | Logged onto network. No calls in progress |
| Flashing | GPRS data transfer |
| On | Connected and Voice call or Data call in progress |
GSM Terminal SIM and Network
Coverage Tests
The SIM must not have a PIN code set, if the SIM has a PIN code
set use a GSM phone to remove the PIN. Place the SIM into the GSM
modem, connect the antenna, power and RS232 cable.
Connect the GSM modem to a COMS port of PC start Hyperterminal
(under accessories, communications in most Windows OS)
Set up the following in a new connection in Hyperterminal
Baud – 19200, Bits – 8, Parity – None, Stop bits – 1, Flow Control
– None
Type the following AT commands
AT – should return OK
AT+CREG? – if registered on network second value should be 1
AT+COPS? – returns Network operator eg. VODAFONE
AT+CSQ – checks signal strength, value should be greater than 10
Setting up MC35iT to
Auto Answer a Data Call
The SIM card for the MC35iT must have a Terminating Circuit Switched
Data Number to receive data calls (this may be a different number
to a GPRS number).
Connect the GSM modem to a COMS port of PC start Hyperterminal
(under accessories, communications in most Windows OS)
Set up the following in a new connection in Hyperterminal
Baud – 19200, Bits – 8, Parity – None, Stop bits – 1, Flow Control
– None
ATS0 = 2 (answer in 2 rings)
AT&W (save settings)
AT&V (check current profile and S0,002)
When dialing the modem from another device the modem will now
answer after 2 rings.
GPRS Setup for Siemens MC35iT:
The commands for to setup GPRS on the MC35iT from a terminal
session are:
AT^SGAUTH=1
AT+CGDCONT=1,”IP,”Telstra.Internet”
AT*99***1#
Each command is executed with a CR (Enter) and will return OK.
The second line above is the APN for Telstra.
For Vodafone it’s “VFINTERNET.AU”
For Optus it’s “INTERNET”
How to send SMS from Siemens
GSM Terminals TC35, MC35:
Using any Terminal program (e.g. Hyper Terminal) you can send
and receive SMS via the Siemens TC35i, MC35i or MC35iT:
There are only 3 AT commands required to send SMS which are:
AT+CSCA=”xxxxx” where xxxxx is the network SMS Central
number
AT+CMGF=1
AT+CMGS=”####” where #### is the phone number you want
to send the message to followed by a CR which will give you a prompt.
You can then type the message you want then follow it with a CTRL+Z
(that is CONTROL button and Z button pressed together)
To Receive SMS type AT+CMGR=1
Free SMS Software for
Microsoft customers
The following link is for the Microsoft SMS Sender which includes features such as a phone book, time sending and saves messages to your hard disk.
SMS Centre numbers for the
3 major networks in Australia are:
Telstra: +61418706700
Vodafone: +61415011501
Opt us: +61411990001