Rainbow Electronics GE863-GPS low power - Manual (Page 18)

GE863-GPS Software User Guide
1vv0300724 Rev. 3 - 05/07/07
Reproduction forbidden w ithout Telit Communications S.p.A. w ritten authorization - All Rights Reserved page 18 of 122
2.5.3 Network checking
2.5.3.1 Query network status
•
send command AT+CREG?
•
wait for response:
Response Reason Action
+CME ERROR: 10 SIM not present or damaged Check SIM or require SIM
insertion and repeat from par.
2.5.2.2
+CME ERROR: 11 SIM is present and PIN is
required to continue operations Repeat par. 2.5.2.3
+CREG: 0,0
or
+CREG: 1,0 No GSM/DCS network is found Check for antenna cable
connection (antenna may be
disconnected or damaged) or
change position if the antenna
is OK. Repeat par. 2.5.3.1 until
a network is found.
+CREG: 0,1
or
+CREG: 1,1 Mobile is registered on its home
network. Proceed ahead. Ready to call
+CREG: 0,2
or
+CREG: 1,2 Mobile is currently not
registered on any network but is
looking for a suitable one to
register. Repeat procedure at par.
2.5.3.1 to see if it has found a
suitable network to register in.
+CREG: 0,3
or
+CREG: 1,3 Mobile has found some
networks but it is not allowed to
register on any of them, no
roaming was allowed. Try in another place, and repeat
procedure at par.2.5.3.1
+CREG: 0,4
or
+CREG: 1,4 Mobile is in an unknown
network status Repeat procedure at par.2.5.3.1
to see if it has found a suitable
network to register in
+CREG: 0,5
or
+CREG: 1,5 Mobile has found some
networks and is currently
registered in roaming on one of
them Proceed ahead. Ready to call
TIP: When a response +CREG: x,1 or +CREG: x,5 is received, then the device is ready to place
and receive a call or SMS. It is possible to jump directly to call setup procedures or SMS
sending procedures.