Siemens MC55 - Manual (Page 191)

MC55 AT Command Set
8.3 AT+CREG
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MC55_ATC_V01.05 Page 191 of 469 2/10/04
Confidential / Released
Command Description
Read command returns the URC presentation mode
<n>
and an integer
<stat>
that shows the registration sta-
tus of the ME. The location information elements
<lac>
and
<ci>
are returned only when
<n>
=2 and ME is
registered to the network.
Use the write command to select the type of URC. Two types of URCs are available:
<n>
=1: +CREG:
<stat>
<n>
=2: +CREG:
<stat>
[,
<lac>
,
<ci>
]
Parameter Description
0 (&F) disable URCs
1 enable URC +CREG:
<stat>
to report status of network registration
2 enable URC +CREG:
<stat>
[,
<lac>
,
<ci>
] to report status of network regis-
tration including location information. Please note that optional parameters will
not be displayed during call.
0 Not registered, ME is currently not searching for new operator
There is a technical problem. User intervention is required. Yet, emergency
calls can be made if any network is available. Probable causes.
• No SIM-Card available
• No PIN entered
• No valid Home PLMN-Entry found on the SIM
1 Registered to home network
2 Not registered, but ME is currently searching for a new operator.
The ME searches for an available network. Failure to log in until after more than
a minute may be due to one of the following causes:
• No network available or insufficient Rx level.
• The ME has no access rights to the networks available.
• Networks from the SIM list of allowed networks are around, but login fails
due to one of the following reasons:
- #11 ... PLMN not allowed
- #12 ... Location area not allowed
- #13 ... Roaming not allowed in this location area
After this, the search will be resumed (if automatic network search is
enabled).
• The Home PLMN or an allowed PLMN is available, but login is rejected by
the cell (reasons: Access Class or LAC).
If at least one network is available, emergency calls can be made.
3 Registration denied
• If automatic network search is enabled:
Authentication or registration fails after Location Up-date Reject due to one
of the following causes:
- #2 ... IMSI unknown at HLR
- #3 ... Illegal MS
<n>
(num)(&W)(&V)
<stat>
(num)(&V)