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4 AT Commands, S-Registers, & Result Codes
32
MultiModemZBA-V-V92 User Guide
+DS44? Reports current options in the following format:
direction
, 0, 0,
max_codewords_tx
,
max_codewords_rx
,
max_string_tx
,
max_string_rx
,
max_history_tx
,
max_history_rx.
Example:
+DS44: 3, 0, 0, 1024, 1024, 255, 255, 5120, 4096.
Subparameters
direction
Specifies the DTE direction of the data compression.
0 No compression.
3 Compression in both directions (default).
max_codewords_tx
Specifies the maximum number of code words to be negotiated
in the transmit direction.
1024 Default.
256–2048 Maximum number of code words in transmit direction.
max_codewords_rx
Specifies the maximum number of code words to be negotiated
in the receive direction.
1024 Default.
256–2048 Maximum number of code words in receive direction.
max_string_tx
Specifies the maximum string length to be negotiated in the
transmit direction.
255 Default.
31–255 Maximum string length in transmit direction.
max_string_rx
Specifies the maximum string length to be negotiated in the
receivedirection.
255 Default.
31–255 Maximum string length in receivedirection.
max_history_tx
Specifies the maximum length of the history buffer to be negoti-
ated in the transmit direction.
5120 Default.
512–11008 History buffer size in transmit direction.
max_history_rx
Specifies the maximum length of the history buffer to be negoti-
ated in the receive direction.
4096 Default.
512–11008 History buffer size in receive direction.
Command: +ES=
n
Enable Synchronous Buffered Mode
Values:
n
= 6
Default: None
Description: Allows an H.324 video application direct access to the synchro-
nous data channel. On underflow, the modem sends HDLC flag
idle (0x7E) to the remote modem.·This special error control
mode is overridden by any of the following commands: &F,
&M, &Q, or \N.
+ES=6 Enables direct access to the synchronous data channel.
+ES=? Displays the allowed values.
+ES? Displays the current value.