Application notes
Version 8 dated 15.03.00 176
Siemens Information and Communication Products
A
8.3.2 Call setup
No Fault Error
Message
Status Check SW response /
comment
Action
1 No call
setup
possible
No Carrier SIM card inser-
ted,(3V),Anten-
na connected,
Power On, Igniti-
on high. M20T
LED blinking
3V SIM
Card?
Old SIM cards are
5V,new ones 3V. Check
with Network Provider.
M20 accepts only 3V
SIM cards!!!!
2 AT+CSQ:
Signal Qua-
lity
+csq: <value>: if
less 10
rearrange Antenna
position, check
Antenna connections,
Signal Quality for pro-
per function needs to be
larger 12.
3 AT+CPIN?:
PIN Status
ERROR No SIM-Card inserted,
SIM card defective, SIM
holder not
inserted properly
4 +cpin: SIM PIN Enter Pin-code:
AT+CPIN="xxxx" /
number in quotes
5 AT+CREG? +CREG: 0,0 M20 not booked into
Net: AT+COPS=0 (se-
arch for Network, and
book in)
6 +CREG: 0,2 M20 searching for
network; when LED
stops blinking, booked
into network
7 AT+COPS=
0
(can take up to 1
minute) +cops:
<provider name>
Forces M20 to search for
a network
8 No call setup
possible
No Carrier M20 active, boo-
ked into net (M20
idle), number
exists, M20T
LED ON
AT+CLCK=
"AO",2
+CLCK: 0 Outgoing call
possible; problem has
other cause.
9 +CLCK: 1,1 /
Outgoing voice
call barred
AT+CLCK="AO",0,"<c
ode>",7 /Unlock all
services, <code> availa-
ble from
Network provider
(barring services)
10 +CLCK: 1,2 /
Outgoing data call
barred
AT+CLCK="AO",0,"<c
ode>",7 /Unlock all
services, <code> availa-
ble from
Network provider
(barring services)
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