Traditionally, messages came into IMS through its SNA data communication protocol from VTAM.
传统上，消息通过SNA数据通信协议从VTAM进入IMS。
VTAM (Virtual Telecommunicatio Access Method) is an IBM application program interface (API) for communicating with telecommunication devices and their use.
通信系统（虚拟电信访问方法）是一个IBM应用程序编程接口（API）与电信通信设备及其使用。
VTAM (Virtual Telecommunicatio Access Method) is an IBM application program interface (API) for communicating with telecommunication devices and their use.
通信系统（虚拟电信访问方法）是一个IBM应用程序编程接口（API）与电信通信设备及其使用。
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