Providing SMS and MMS functions | 负责短彩信相关功能
Provides telephony persistent data storage and DataAbility access interfaces | 负责telephony持久化数据存储，提供DataAbility访问接口
负责建立蜂窝数据连接
Managing all types of call connections | 管理各种类型的通话连接
Common event and notification management framework | 通知和公共事件管理框架
Audio management implementation | 音频管理功能实现
DSoftBus capabilities, including discovery, networking, and transmission | 软总线发现、组网、传输功能实现
Settings system app | 系统设置应用
JS UI framework | JS UI开发框架
Establishing communication with RIL Adapter | 电话基础服务模块主要功能实现与RIL Adapter进行通信
System ability manager | 系统服务管理
Distributed data manager that provides the capability to store data in the databases of different devices | 分布式数据管理服务模块，提供多设备数据分布式存储能力
Obtaining device status | 获取设备状态
Implementation of media library | 媒体库功能实现
Accessibility Framework | 无障碍框架
Application execution and management framework | 用户程序运行管理框架
Application event logging | 应用事件记录接口及框架
