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Modem Emulator - Network

The AT commands in this section are used for accessing network services on GSM and similar networks.

AT+CNUM Subscriber Number

The AT+CNUM command retrieves the MSISDN's related to the subscriber from the SIM.

    +CNUM: [<alpha>],<number>,<type>[,<speed>,<service>[,<itc>]]
    ...

Execution command returns the MSISDN's related to the subscriber from the SIM. If the subscriber has different MSISDN's for different services, each MSISDN is returned on a separate line.

Conforms with: 3GPP TS 27.007.

AT+COPS Operator Selection

The AT+COPS command is used to select operators, to request the current operator details, and to request a list of the available operators.

Set command forces an attempt to select and register the network operator. <mode> is used to select whether the selection is done automatically by the MT or is forced by this command to use operator <oper>. If the selected operator is not available, no other operator shall be selected (except for <mode>=4). The selected operator name format shall apply to further read commands. <mode>=2 forces an attempt to deregister from the network.

Read command returns the current mode, the currently selected operator and the current access technology (AcT). If no operator is selected, <format>, <oper>, and <AcT> are omitted.

Test command returns a set of five parameters, each representing an operator present in the network. Each set consists of a <stat> integer indicating the availability of the operator, long and short alphanumeric names for the operator, the numeric name for the operator, and the access technology.

Conforms with: 3GPP TS 27.007.

AT+CREG Network Registration

The AT+CREG command control the presentation of unsolicited network registration changes.

Set command controls the presentation of an unsolicited result code +CREG: <stat>[,<lac>,<ci>] when there is a change in the network registration status.

Read command returns the presentation value and the current network registration status.

Conforms with: 3GPP TS 27.007.

AT+CTFR Call Deflection

The AT+CTFR command causes an incoming alerting call to be forwarded to a specific number.

Call Deflection is only available to Teleservice 11.

The <type>,<subaddr> and <satype> parameters are ignored in this implementation. The <number> parameter is a string type phone number.

Conforms with: 3GPP TS 27.007.

AT+CAOC Advice of Charge

The AT+CAOC command enables the subscriber to get information about the cost of calls.

The <mode> parameter can take the following values:

• 0 Query CCM value
• 1 Deactivate the unsolicited reporting of CCM value
• 2 Activate the unsolicited reporting of CCM value

The unsolicited result code +CCCM: <ccm> is sent when the CCM value changes, but not more than every ten seconds, if enabled.

<ccm> is a string type; 3 bytes of the current call meter value in hexadecimal format.

Conforms with: 3GPP TS 27.007.

AT+CPLS Selection of Preferred PLMN List

The AT+CPLS command can be used to select one PLMN Selector With Access Technology list from the SIM card or active application in the UICC, which is used by the AT+CPOL command.

The <list> parameter can take the following values:

Conforms with: 3GPP TS 27.007.

/sa AT+CPOL

AT+CPOL Preferred PLMN List

The AT+CPOL command is used to edit the PLMN Selector With Access Technology lists in the SIM card or active application in the UICC.

Conforms with: 3GPP TS 27.007.

/sa AT+CPLS

AT+CIMI Request International Mobile Subscriber Identity

The AT+CIMI command retrieves the IMSI value from the SIM.

An error will be returned if there is no SIM present, or the SIM is still being initialized and the IMSI is not available yet.

Conforms with: 3GPP TS 27.007.

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