Synxcom SM9234D, User Manual

Page: 78 / 216

AT Commands
Page 78
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 K56flex 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.
%L - Report Line Signal Level
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
%Q - Report Line Signal Quality
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.