Toshiba V.92 - Manual (Page 91)

91 S-Registers
AT command set result codes
5.375 x 8.375 ver 2.4.0
CONNECT 54666 EC* 114 Connection at 54666 bps
Command Set Result Codes Table (Continued)
Result Code Numeric Description
* EC appears only when the Extended Result Codes
configuration option is enabled. EC is replaced by one of the
following symbols, depending upon the error control method
used:
V.44 - V.44 data compression with V.42 error control
V.42bis - V.42 error control and V.42bis data compression
V.42 - V.42 error control only
MNP 5 - MNP class 4 error control and MNP class 5 data
compression
MNP 4 - MNP class 4 error control only
NoEC - No error control protocol