ISO/IEC 11574:2000
Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Circuit-mode 64 kbit/s bearer services -- Service description, functional capabilities and information flows
发布时间：2000-03-23 实施时间：


ISO/IEC 11574:2000标准规定了电路模式64 kbit/s承载服务的服务描述、功能能力和信息流。该标准适用于PISN，包括PSTN和PBX。电路模式64 kbit/s承载服务是一种基于电路交换的传输方式，用于传输语音、数据和图像等信息。该服务提供了一条可靠的、点对点的连接，保证了信息的实时性和完整性。

该标准规定了电路模式64 kbit/s承载服务的功能能力，包括呼叫建立、呼叫保持、呼叫转移、呼叫等待、呼叫释放等。呼叫建立是指在两个用户之间建立一条连接，使它们可以进行通信。呼叫保持是指在通话过程中暂停通话，但不释放连接。呼叫转移是指将呼叫从一个用户转移到另一个用户。呼叫等待是指在通话过程中，当用户接到另一个呼叫时，可以暂停当前通话，接听另一个呼叫。呼叫释放是指在通话结束后释放连接。

此外，该标准还规定了电路模式64 kbit/s承载服务的信息流。信息流是指在呼叫建立、呼叫保持、呼叫转移、呼叫等待、呼叫释放等过程中，传输的各种信息。信息流包括呼叫信令、用户数据和控制信息等。呼叫信令是指用于建立、保持、转移、等待和释放呼叫的信令。用户数据是指用户在通话过程中传输的语音、数据和图像等信息。控制信息是指用于控制呼叫建立、保持、转移、等待和释放的信息。

总之，ISO/IEC 11574:2000标准规定了电路模式64 kbit/s承载服务的服务描述、功能能力和信息流，为PISN的电路模式64 kbit/s承载服务提供了标准化的规范。

相关标准
- ISO/IEC 11572:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Circuit-mode 64 kbit/s bearer services -- Service description, functional capabilities and information flows -- Group call supplementary service
- ISO/IEC 11573:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Circuit-mode 64 kbit/s bearer services -- Service description, functional capabilities and information flows -- Completion of calls to busy subscribers supplementary service
- ISO/IEC 11576:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Circuit-mode 64 kbit/s bearer services -- Service description, functional capabilities and information flows -- Multiple subscriber number supplementary service
- ISO/IEC 11577:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Circuit-mode 64 kbit/s bearer services -- Service description, functional capabilities and information flows -- Advice of charge supplementary service
- ISO/IEC 11578:1995 Information technology -- Telecommunications and information exchange between systems -- Private Integrated Services Network -- Circuit-mode 64 kbit/s bearer services -- Service description, functional capabilities and information flows -- Completion of calls on no reply supplementary service