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Host-Based Controller Modem Data Addendum
AT Command Set June 15,
1998
59 Version 1.0 Lucent Technologies Inc.
V.80 AT Commands
The chip set supports the Synchronous Access Mode and most of the commands specified in V.80 standards.
The commands are either AT commands issued in the command mode, or in-band commands transmitted in the
data stream. These in-band commands are delimited by the hexadecimal characters EM (or numerically, 19h.)
A)
Synchronous Access Mode AT commands
Table 9. V.80 AT Commands
Command Sub-
parameters
Values Description
+ES=[<orig_rqst>[,,<ans_fbk
>]]
Orig_rqst
ans_fbk
6 Initiate
Synchronous Access Mode
when the data state is
entered.
8 Initiate
Synchronous Access Mode
when connection is
completed and Data State
is entered.
Control the manner of
operation of the V.42 protocol
in the DCE
+ES?
Read Syntax command to
query the current values of the
+ES sub-parameters. The
DCE shall transmit a string of
information text to the DTE
consisting of
+ES:<orig_rqst>, ,<ans_fbk>.
+ES=?
Test Syntax command to
obtain all defined values of the
+ES sub-parameters. The
DCE shall transmit a string of
information text to the DTE
consisting of
+ES:( list of supported
<orig_rqst> values), ,(list of
supported <ans_fbk> values).