Siemens AC75 Benutzerhandbuch

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AC75_ATC_V01.002

Page 195 of 569

10/30/06

Confidential / Released

 queries the present status of the AC75's network registration and allows to determine whether auto-

matic or manual network selection shall be used. Additional service is available with 

Three operator selection modes are available: 
• Automatic 

AC75 searches for the home operator automatically. If successful the AC75 registers to the home network. If

the home network is not found, AC75 goes on searching. If a permitted operator is found, AC75 registers to

this operator. 

If no operator is found the AC75 remains unregistered. 

• Manual 

Desired operator can be determined using the 

 write command. If the operator is found, AC75 reg-

isters to it immediately. If the selected operator is forbidden, the AC75 remains unregistered. 

• Manual/automatic 

The ME first tries to find the operator determined via 

 write command. If the ME is able to register

to this operator, it enters the manual operator selection mode. If the ME cannot find this operator or fails to

register to this operator, then it enters the automatic operator selection mode and starts to select the home

operators network or another (permitted) one. If the ME is registered and the manually selected network is

not available, the ME will remain registered without further result code notification. 

The most recently entered operator selection mode is still valid after the ME was restarted (power-off/on). 

The 

 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 

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 

 read command returns the current 

 and the currently selected operator. If no operator is

selected, 

 and 

 are omitted. 

The 

 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 

=4). The

selected operator name 

 will apply to further read commands, too. 

Command settings are effective over all serial interfaces of the AC75. 

Test Command

AT+COPS=?

Response(s)

+COPS: 

[list of present operators (

, long alphanumeric 

s,,numeric 

s ], , (list of 

supported 

s), (list of supported 

s)

OK 

ERROR