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Table A-1.
AT Commands, Cross-Referenced to Front Panel Options (Continued)
AT
Parameter &
Command
Option
*
AT
LE1
=15 min
*
AT
LE2
=30 min
*
AT
LE3
=1 Hr
*
AT
LE4
=2 Hr
*
AT
LE5
=4 Hr
LAL Busy Out
*
AT
LL0
=Off
*
AT
LLl
=On
*
AT
LNm,n
Link Phone #'s:
#m to #n
Low Speed
*
AT
LS0
=Bell
*
AT
LS1
=CCITT
DTE Pin 25
*
AT
LT0
=Busy
*
AT
LTl
=Test
PSTN Signaling PSTN Signaling
*
AT
MD0
=Off
Gray shading indicates country-specific options. See Appendix C for your country's options.
A-22 Configuration Quick Reference
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Description
The modem returns to the leased line after 15 minutes.
The modem returns to the leased line after 30 minutes.
The modem returns to the leased line after 1 hour.
The modem returns to the leased line after 2 hours.
The modem returns to the leased line after 4 hours.
Local Analog Loopback Test Busy Out
Determines whether the modem appears busy to incoming calls during a local analog loopback
test. NOTE: Set AT&J (TELCO OPT'S Telco) to RJ4MB before enabling this option.
The modem does not busy out the line during a local analog loopback test, allowing incoming
calls to ring.
The modem connects to the line during a local analog loopback test, making the line appear
busy to incoming calls.
Link Telephone Numbers
Lets you link telephone numbers stored in the modem's telephone book. Some remote
locations provide more than one number to call in case one is busy. If a call fails and the
number is linked, the modem pauses and then calls the linked number. NOTE: With this
feature enabled, the modem dials linked numbers before redialing.
To link numbers using the AT Command, enter AT
the number you want to link from (n), a comma, and the memory location of the number to link
(m). For example:
*
AT
LN2,4
In this example, memory location 2 is linked to memory location 4. To clear the link between
the two memory locations, enter AT
memory location.
Low Speed
Determines which low-speed modulation mode is used when a higher (V.34, V.32bis, V.32, or
V.22bis) modulation mode connection cannot be made while Mod=V.34 Auto, V32bis Auto or
Auto V32.
Bell 103 modulation mode is used.
V.21 modulation mode is used.
DTE Pin 25
Controls whether the modem uses EIA/TIA 232-D Pin 25 as an input or an output. Set rear
panel Switch 2 to match this setting (see Table A-6 for details on rear panel switches).
The DTE signals the modem on Pin 25 to make the modem appear busy to incoming calls. Set
rear panel DIP switch 2 to the off (up) position. Also, set AT&J (Telco) to RJ4MB. NOTE: In
modems in the U. S. A. and Canada, the Make Busy function operates only in nest card
modems. (Make Busy settings display in standalone modems, but are not active.)
The modem signals the DTE on V.24 Circuit 142 (Pin 25) when a test is in progress.
Determines how the modem handles disconnect signaling when operating in the V.34, V.32bis
or V.32 (coded or uncoded) modulation modes.
Your modem disconnects without signaling the remote modem.
*
LN, followed by the memory location of
*
LN2. Effectively, memory location 2 is now linked to no
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