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Chapter 5 – AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. SocketModem MT5600SMI Developer’s Guide 47
Command: \V Single Line Connect Message Enable
Description: Enables or disables the single-line connect message format as follows:
Default: None
Defined Values:
\V0 Connect messages are controlled by the command settings X, W,
and S95.
\V1 Connect messages are displayed in the single line format described
below subject to the command settings V (Verbose) and Q (Quiet). In
Non-Verbose mode (V0), single line connect messages are disabled
and a single numeric result code is generated for CONNECT DTE.
When single line connect messages are enabled, there are no CARRIER,
PROTOCOL (+ER:), or COMPRESSION (+DR:) messages apart from the
fields described below.
The single line connect message format is:
CONNECT <DTE
Speed>/<Modulation>/<Protocol>/<Compression>/<Line Speed>
Where:
DTE Speed = DTE speed, e.g., 57600.
Modulation = “V92” for V.92 modulation.
“V90” for V.90 modulation.
“K56” for 56K modulation.
“V34” for V.34 modulation.
“V32” for V.32 or V.32bis modulation.
Note: Modulation is omitted for all other modulations.
Protocol = “NONE” for no protocol.
“ALT” for Microcom Network Protocol.
“LAPM” for LAP-M protocol.
Compression = “V44” for V.44 compression.
“V42B” for V.42bis compression.
“ALT” for Microcom MNP5 compression.
Note: Compression is omitted if protocol is NONE.
Line Speed = Asymmetric rates are displayed as “/rate:TX/rate:RX”,
e.g., /1200 TX/75 RX.
Symmetric rates are displayed as a single DCE rate,
e.g., 14400.
Command: %L Report Line Signal Level
Description: Returns a value, which indicates the received signal level. The value
returned is a direct indication (DAA dependent) of the receive level at the
MDP, not at the telephone line connector. For example, 009 = -9 dBm, 043
= -43 dBm, and so on.
Result Codes: OK
Command: %Q Report Line Signal Quality
Description: Reports the line signal quality (DAA dependent). Returns the higher order
byte of the EQM value. Based on the EQM value, retrain or fallback/fall
forward may be initiated if enabled by %E1 or %E2.
Example: AT%Q
015
Result Codes: OK If connected.
ERROR If not connected, or connected in 300 bps, V.23, or fax modes.