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Configuration Quick Reference A-15
Configuration
Quick-Reference
AT
*
AS1 =Always A dial call is always answered. As soon as the dial call is answered, the leased line connection
is dropped (with auto-answering, the leased line is dropped after the correct number of rings).
If training on the dial line fails, the modem returns to the leased line.
AT
*
AY0
Auto Type
=CCITT
Auto Type
During answer-back tone, the modem attempts to negotiate a connection in the V.32
modulation mode. As soon as answer-back tone ends, if a V.32 tone has not been detected
during ABT, the modem attempts to negotiate a connection in the V.22bis modulation mode.
AT
*
AY1 =Codex During answer-back tone, the modem attempts to negotiate a connection in the V.32
modulation mode. After sending answer-back tone, the modem continues to attempt to
negotiate a connection in the V.32 modulation mode. If unsuccessful, the modem tries to
negotiate a connection in the V.22bis modulation mode.
Blind Dial
Blind Dial
Determines the time the modem waits before dialing; once time has expired, the modem dials
without waiting for a dial tone.
AT
*
BD0 =2 The modem waits 2 seconds before dialing.
AT
*
BD1 =4 The modem waits 4 seconds before dialing.
AT
*
BD2 =S6 The modem waits the amount of time specified by S-Register 6 before dialing.
Break
Break Handling
Controls how the modem handles the break signal in reliable and auto-reliable data modes.
Break signals are sent to the DTE for the duration specified in S-Register 97.
AT
*
BK0 =Destruct The modem uses destructive and expedited break handling. It passes the break to the remote
site immediately and deletes all data from its buffers. NOTE: Destructive breaks reinitialize
data compression tables for MNP-5 and V.42bis.
AT
*
BK1 =Expedited The modem uses nondestructive and expedited break handling. It passes the break to the
remote site immediately without deleting data from its buffers.
AT
*
BK2 =Standard The modem uses standard break handling. It passes the break to the remote site in sequence
with any transmit data from its buffers.
AT
*
CA0
Mode
=Orig
Answer/Originate Mode
The modem operates as an originating modem in a manual answer/dial application.
AT
*
CA1 =Answer The modem operates as an answer modem in a manual answer/dial application.
AT
*
CA2 =External The signal from the DTE on EIA/TIA 232-D Pin 11 determines whether the modem is in
answer or originate mode. If the signal is off, the modem is in originate mode; if the signal is
on, the modem is in answer mode
AT
*
CA3 =Auto A in O The modem configures itself as an originating modem after auto-answering a call. In leased-
line operation, the modem functions as if it is set to originate calls. NOTE: The functions
provided by this setting only apply when the modem auto-answers.
AT
*
CD0
DCD Loss Dis
=Off
DCD Loss Disconnect
The modem will not disconnect due to loss of carrier.
AT
*
CD1 =3 s The modem hangs up if it loses carrier for 3 seconds.
AT
*
CD2 =7 s The modem hangs up if it loses carrier for 7 seconds.
AT
*
CD3 =S10 The modem checks the value stored in S-Register 10 to determine when it disconnects due to
loss of carrier. See the “S-Registers” section in Chapter 5 for more information.
Table A-1.
AT Commands, Cross-Referenced to Front Panel Options (Continued)
AT
Command
Parameter &
Option Description
Gray shading indicates country-specific options. See Appendix C for your country’s options.