Wavecom WMO2 GSM 900 User Manual page 18

B) Additional hints
Is the antenna properly connected?
For GSM 900
For GSM 1800 : use a 1710 to 1880 MHz / 50 Ohms antenna.
For GSM 1900 : use a 1850 to 1990 MHz / 50 Ohms antenna.
Is the received signal strong enough?
With the AT-Command AT+CSQ check that the received signal (1
enough to be able to establish a call.
The modem always returns «No carrier» when trying to issue a voice communication?
Insure the character «semicolon» is present straight after the phone number on the AT-Command
ATD######;
The modem always returns «No carrier» when trying to issue a data communication?
Insure the selected bearer type is supported by the called party.
Then, insure the selected bearer type is supported by the Network.
If no success, try bearer selection type: AT+CBST=0,0,3.
Insure the SIM Card is available for Data/Fax calls.
Wavecom WMO2 Modem
GUIDE
: use a 870 to 960 MHz / 50 Ohms antenna.
A T + C S Q e r s p o n s e
R ( S S ) I
1 1 o t 3 1
0 o t 1 0
a n d + 9 9
* based on general observations.
15
18
st
parameter of the response) is strong
S g i n l a q u a i l y t
S h o u d l b e s f u c i f e i n * t
C o u d l b i e s n f u c i f e i n * t
19/04/99, 9:22