Multi-Tech Systems DT101 Compression and Maximum Block Size Commands, Data Compression, 140

DataTalker Owner’s Manual

F.10 Compression and Maximum Block Size Commands

Data Compression

The data compression (&E14) command enables data compression.

Maximum Block Size &BS

The maximum size of Reliable mode data blocks can be controlled with the &BS command. MNP 3 sends blocks of 1 to 64 characters. MNP 4 and 5 typically send blocks of 1 to 256 characters and LAP-M typically sends 128 characters. For MNP classes 4 and 5/LAP-M, reducing the block size to 64 characters may give a smoother flow of data and better throughput on noisy phone lines. Using smaller block sizes over good phone lines may cause a slight loss in throughput (speed).

AT&BS0 = Maximum transmit block size of 64 characters

AT&BS1 = Maximum transmit block size of 128 characters (LAP-M) 256 characters (MNP)

The factory default setting is &BS1.

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