A communications apparatus, comprising: a baseband signal processing device; a radio frequency, RF, signal processing device; a memory device; and a processor configured for transmitting a normal call-establishment signal with a remote identifier to a network to originate a normal call in response to a first call-origination request with the remote identifier, for receiving an indication message indicating that the normal call is routed as an emergency call from the network, for recording the remote identifier in the memory device, and when receiving a second call-origination request with the remote identifier, transmitting an emergency call-establishment signal with the remote identifier to the network to originate an emergency call in response to the second call-origination request; characterized in that the remote identifier is stored in an emergency-call database in the memory device, and the processor is further configured for detecting that the remote identifier is an emergency call address according to the emergency-call database and for transmitting the emergency call-establishment signal with the remote identifier to the network to originate the emergency call in response to the second call-origination request when the second call-origination request with the remote identifier is received. a baseband signal processing device; a radio frequency, RF, signal processing device; a memory device; and a processor configured for transmitting a normal call-establishment signal with a remote identifier to a network to originate a normal call in response to a first call-origination request with the remote identifier, for receiving an indication message indicating that the normal call is routed as an emergency call from the network, for recording the remote identifier in the memory device, and when receiving a second call-origination request with the remote identifier, transmitting an emergency call-establishment signal with the remote identifier to the network to originate an emergency call in response to the second call-origination request; for transmitting a normal call-establishment signal with a remote identifier to a network to originate a normal call in response to a first call-origination request with the remote identifier, for receiving an indication message indicating that the normal call is routed as an emergency call from the network, for recording the remote identifier in the memory device, and when receiving a second call-origination request with the remote identifier, transmitting an emergency call-establishment signal with the remote identifier to the network to originate an emergency call in response to the second call-origination request; characterized in that the remote identifier is stored in an emergency-call database in the memory device, and the processor is further configured for detecting that the remote identifier is an emergency call address according to the emergency-call database and for transmitting the emergency call-establishment signal with the remote identifier to the network to originate the emergency call in response to the second call-origination request when the second call-origination request with the remote identifier is received.