1.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。
2.Also, the synchronous data link control (SDLC) pro- tocol and the remote communication access method VTAM are introduced.
本文还简要地介绍了同步数据键路控制（SDLC）规程以及远程通信访问法VTAM。
3.VTAM? Virtual Terminal Access Method?
虚拟终端存取法？。