SEQUANS Communications Confidential and Proprietary
GM01Q/NB01Q
User Manual,
Revision 1 Application Note
13/22
o
From the Terminal, enter : AT+CEREG=1.
This command will allow getting notification every time there is a
change of the network registration status
o
From the Terminal, enter : AT+CFUN=1
o
Response will be
OK
Followed by
+CEREG=<
stat
>
o
<
stat
>=
0
: Modem is not registered and is not currently
searching an operator to register to.
Possible cause : SIM card error or registration
ongoing
o
<
stat
>=
1
: Modem is registered on network
–Kit
connected-
o
<
stat
>=
2
: Modem is not registered, but is currently
trying to attach or is searching for an operator to
register to.
Possible causes:
No network available
Available networks have bad coverage
PLMN available but the registration is
rejected
o
<
stat
>=
3
: Registration denied
Possible causes:
Illegal mobile equipment
IMSI unknown at HLR
PLMN not allowed
Location area not allowed
Roaming not allowed in this location
area
Network failure
Network congestion
o
<
stat
>=
4
: Unknown. Transitory value
o
<
stat
>=
5
: Modem Registered in roaming mode