Two primary transmission modes are being utilized in IP fax systems: store-and-forwardmode and real-time mode.
IP传真系统中使用两种基本的传输模式：存储转发模式和实时模式。
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This Recommendation describes the guidelines for the support of the communication of facsimile documents (both Group 3 and Group 4) via the Internet in real-time or store-and-forwardmode.
Some switches can be configured to perform cut-through switching on a per-port basis until a user-defined error threshold is reached, when they automatically change to store-and-forwardmode.