INDEPENDENT VOLUME CONTROL FOR MULTI-SYSTEM RADIO TELEPHONE

摘要

A multi-system radio telephone (10) operable in at least first and second radio communication systems includes an apparatus executing a method for controlling audio output volume levels of the radio telephone. According to one embodiment, a multi-system radio telephone is operable in a conventional analog cellular system (30) and a conventional local cordless system (12). The multi-system radio telephone includes two distinct memory areas (84, 86) for storing representations of volume levels for each of the respective radio communication systems. After the radio telephone determines which radio communication system (cellular or cordless) will be used for a particular radio communication session, the corresponding memory area is read to determine a default volume level for that radio communication system. The speaker (44) is then set to that particular volume level. During the communication session the user is also able to modify the volume level through conventional interaction with volume adjustment buttons (52, 54). If an indication for such a modification is detected, a representation of the new volume level is stored in the appropriate memory area in place of the old default volume level representation, and the speaker (44) is set to the new default volume level for that particular radio communication system. A visual representation of the volume level is also presented on the radio telephone display (58). This independent volume control method will provide the user with automatic volume control which is sensitive to the type of communication system being used during each communication session.