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Chapter 5 – AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 62
The format of this result code is:
Defined Values: <type> An alphanumeric code corresponding to the selected option:
NONE Data compression is not in use.
V42B V.42bis is in use in both directions.
V42B RD V.42 bis is in use in receive direction only V42B TD V.42 bis
is in use in transmit direction only V44 V.44 is in use in both
directions V44 RD V.44 is in use in receive direction only V44
TD V.44 is in use in transmit direction only ALT MNP 5
compression.
Example: +DR: V42B
Command: %C Enable/Disable Data Compression
Description: Enables or disables data compression negotiation. The modem can only
perform data compression on an error-corrected link. The parameter value,
if valid, is written to S41 bits 0 and 1.
Defined Values: %C0 Disables data compression. Resets S46 bit 1.
%C1 Enables MNP 5 data compression negotiation. Resets S46 bit 1.
%C2 Enables V.42 bis data compression. Sets S46 bit 1.
%C3 Enables both V.42 bis and MNP 5 data compression. Sets S46 bit
1. (Default.)
Result Codes: OK
ERROR