MC55_ATC_V04.00 Page 163 of 475 3/17/06
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8.2 AT+COPS Operator Selection
AT+COPS queries the present status of the MC55's network registration and allows to determine whether auto-
matic or manual network selection shall be used. Additional service is available with AT^SOPS.
Three operator selection modes are available:
• Automatic
MC55 searches for the home operator automatically. If successful the MC55 registers to the home network.
If the home network is not found, MC55 goes on searching. If a permitted operator is found, MC55 registers
to this operator.
If no operator is found the MC55 remains unregistered.
• Manual
Desired operator can be determined using the AT+COPS write command. If the operator is found, MC55 reg-
isters to it immediately. If the selected operator is forbidden, the MC55 remains unregistered.
• Manual/automatic
The ME first tries to find the operator determined via AT+COPS write command. If the ME fails to register to
this operator, then it starts to select another (permitted) operator automatically.
The AT+COPS test command lists sets of four parameters, each representing an operator present in the network.
A set consists of
• an integer indicating the availability of the operator,
• long alphanumeric format of the operator's name and
• numeric format representation of the operator.
Any of the parameters may be unavailable and will then be an empty field (,,). The list of operators comes in the
following order: Home network, networks referenced in SIM and other networks.
The operator list is followed by a list of the supported <mode>s and <format>s. These lists are delimited from
the operator list by two commas.
If the test command is used during an ongoing GPRS transfer, traffic will be interrupted for up to one minute.
The AT+COPS read command returns the current <mode> and the currently selected operator. If no operator is
selected, <format> and <oper> are omitted.
The AT+COPS write command forces an attempt to select and register to the GSM network operator (see note
below). If the selected operator is not available, no other operator will be selected (except <mode>=4). The
selected operator name <format> will apply to further read commands, too.
Command settings are effective over all serial interfaces of the MC55.
Syntax
Test Command
AT+COPS=?
Response(s)
+COPS: [list of present operators (<opStatus>, long alphanumeric <oper>s,,numeric <oper>s ], , (list of
supported <mode>s), (list of supported <format>s)
OK
ERROR
+CME ERROR: <err>
Read Command
AT+COPS?
Response(s)
+COPS:<mode>[, <format>[, <oper>]]
OK
ERROR
+CME ERROR: <err>