Chapter 1 – AT Commands, S-Registers and Result Codes
Multi-Tech Systems, Inc. SocketModem MT5600SMI/MT5656SMI Reference Guide (S000306C)
22
Command:
\V
Single Line Connect Message Enable
Description:
Enables or disables the single-line connect message format as follows:
Default:
None
Defined Values:
\V
0 Connect messages are controlled by the command settings X, W,
and S95.
\V
1 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.
