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Example: +DR: (0,1)
+DR: <type> Intermediate Result Code
The +DR: <type> reported represents the current (negotiated or renegotiated)
modem-modem data compression type. If enabled, the intermediate result code is
transmitted at the point after error control negotiation (handshaking) at which the modem
has determined which data compression technique will be used (if any) and the direction
of operation. The +DR intermediate result code, if enabled, is issued after the Error
Control Report (+ER) and before the final result code (e.g., CONNECT).
The format of this result code is:
Result Code Syntax
+DR: <type>
Defined Values
<type> An alphanumeric code corresponding to the selected option:
NONE Data compression is not in use.
V42B V.42bis is in use in both directions.
ALT MNP 5 compression.
Example
+DR: V42B
3.2.6.3 %E - Enable/Disable Line Quality Monitor, Auto-Retrain, and Auto-Rate
Renegotiation
This command controls whether or not the modem will automatically monitor the line
quality and request a retrain (%E1) or a rate renegotiation when line quality merits a
change. If enabled, the modem attempts to retrain for a maximum of 30 seconds.
Syntax
%E[<value>]
Defined Values
<value> A decimal number corresponding to the selected option:
0 = Disable line quality monitor, auto-retrain, and auto-rate renegotiation.
1 = Enable line quality monitor, auto-retrain, and auto-rate renegotiation. (Default.)
Result Code
OK <value> = 0 and 1
ERROR Otherwise.
3.2.6.4 %L - Line Signal Level
This command returns a value which indicates the received signal level. The value
returned is a direct indication (DAA dependent) of the receive level at the modem data
pump (MDP), not at the telephone line connector. For example, 009 = -9
dBm, 043 = -43 dBm, and so on.
Syntax
%L
Example:
%L
015
Result Code
OK
3.2.6.5 %Q - Line Signal Quality
This command returns a value which indicates the line signal quality (DAA dependent).
Returns the higher order byte of the EQM value. Based on the EQM value, retrain or rate
renegotiation may be initiated if enabled by %E1.
Example:
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