Multi-Tech Systems MT2456SMI22 User Manual
Page 24
Chapter 4 - V.22bis Commands
Multi-Tech Systems, Inc. MT2456SMI-22 SocketModem Developer’s Guide
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\V
Single Line Connect Message Enable
This command enables or disables the single line connect message format as follows:
Syntax \V<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0
Connect messages are controlled by the command settings X, W, and S95.
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 or PROTOCOL (+ER:) 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., 2400.
Modulation =
“V21” for V.21 modulation.
“B103” for Bell 103 modulation.
“B212” for Bell 212A modulation.
“V22” for V.22 modulation.
“V22B” for V.22bis modulation.
“V23C” for V.23 modulation.
Note: Modulation is omitted for all other modulations.
Protocol =
“NONE” for no protocol.
“ALT” for Microcom Network Protocol.
“LAPM” for LAP-M protocol.
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., 2400.
%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 Code
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 may be initiated if enabled by %E1.
Example:
AT%Q
015
Result Codes
OK if connected
ERROR if not connected, or connected in 300 bps or V.23 modes
*B
Display Blacklisted Numbers
This command requests the modem to return a list of blacklisted numbers to the DTE. The format of the response is
shown by the example below. Permanently forbidden numbers as defined by country requirements will not appear on
this list. If no numbers are blacklisted, only the OK result code is issued.
Syntax *B
Example
NO. - PHONE NUMBER -
------ ------------------------------
1; 4175537660
2; 8288924961
3; 3887278862
4; 3124839442
5; 6284664
OK