信息技术 - UPnP设备架构 - 第26-16部分:电话设备控制协议 - 第2级 - 存在服务

[中文适用范围]： 此服务定义符合[1]。它定义了一种称为存在服务的服务类型。该存在服务是一种UPnP服务，允许控制点（也称为语音控制点(TelCP)）通过语音服务器(TS)设备或语音客户端(TC)设备（充当存在服务的UPnP服务器设备）管理联系人的存在信息。此服务为控制点提供以下功能：• 获取联系人是否存在，访问通过UPnP语音服务器设备提供的联系人存在信息。存在服务引用的联系人可以通过电话管理服务和电话数据模型进行管理。• 管理存在信息，更新存储在TS中的存在状态。此服务不提供以下功能：• 从本地UPnP网络中的UPnP服务器设备到远程存在服务器（即本地UPnP网络之外）更新本地UPnP网络中的存在状态。• 从远程存在服务器（即本地UPnP网络之外）检索联系人存在信息。当存在服务提供的功能与电话管理功能结合使用时，可以实现地址簿和地址簿中联系人存在的集成管理。 [外文原描述]： ISO/IEC 29341-26-16:2017 is compliant with the [1]. It defines a service type referred to herein as Presence service. The Presence service is a UPnP service that allows control points, or better known as Telephony Control Points (TelCP), to manage presence information through a Telephony Server (TS) device or a Telephony Client (TC) device (in the role of UPnP server device for Presence service). This service provides control points with the following functionality: - Presence of contacts, access the presence information of contacts, as provided by the UPnP Telephony Server device. Contacts referenced by the Presence service may be managed via PhoneManagement service and the Phone Data Model. - Managing presence information, update the presence status stored in the TS; This service does not provide the following functionality: - To update the presence status of the local UPnP network, from the UPnP server device to remote presence servers (i.e. outside the local UPnP network). - To retrieve the presence information of contacts from remote presence servers (i.e. outside the local UPnP network). When the features provided by the Presence service are associated to the PhoneManagement features, then an integrated management of the address book and the presence of contacts in the address book can be delivered.