Dell 3115cn Service Manual page 57

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When the image data has been successfully received, the receiving side sends out MCF to prompt

for subsequent image data transmission. When the received image data contains permissible

errors, the receiving side responds with RTP. When unacceptable errors are detected, the receiving

side responds with RTN.

To a signal requesting operator intervention, the receiving side responds with PIP when the image

data has been received successfully. When the image data contains unacceptable errors, the

receiving side responds with PIN. When retransmission is required in ECM* mode, the receiving

side responds with PPR.

Phase E - Call Release

This phase terminates the entire fax session and releases the line. Before releasing the line, the

sending side sends out DCN, which expects no response.

* ECM (Error Correction Mode)

A transmission method that manages the encoded data by dividing it in units called frames and by

numbering them. In the event of image corruption due to noise, etc., image quality can be corrected

by retransmitting only the corrupted units specified by number.

Multiple frames form a unit called block. One block transmitted, or multiple frames retransmitted are

called partial page.

To use ECM mode, both the sending and receiving sides must have ECM feature.

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