Meaning
Instruction set protocol defines the mechanism for network selection within cellular communication modules. Logic inside the hardware utilizes at command cops to choose between manual and automatic registration on a public land mobile network. Software instructions allow an external processor to query available carriers or force a connection to a specific operator code.
It functions as the primary interface for managing roaming behavior and carrier selection.
Selection Mode
Configuration settings determine whether the modem identifies and attaches to the strongest signal or follows a prioritized list. When at command cops is set to automatic mode, the internal modem firmware manages the scanning and attachment process based on subscriber information stored in memory. Manual mode requires a specific numeric identifier for the target network.
Selection happens during the initial boot sequence or upon loss of service.
Response Format
Querying the status returns a string containing the mode and the numeric name of the provider. The output from at command cops provides the network technology type such as gsm or lte. Data strings enable host applications to verify the geographical status of the device.
Network Registration
Execution of the write variant initiates a synchronization procedure with the base station. If at command cops fails to find the specified network, the modem returns an error code. Registration typically concludes with a status update.
