MC55 AT Command Set

8.3 AT+CREG

Command Description

s

mobile

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

<n>(num)(&W)(&V)

 

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.

 

 

 

 

 

 

 

 

<stat>(num)(&V)

 

 

 

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

 

 

 

 

 

 

 

MC55_ATC_V01.05

Page 191 of 469

2/10/04

Confidential / Released

 

 

 

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Image 191
Siemens MC55 manual =2 +CREGstat,lac,ci