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Configuration Quick Reference A-23
Configuration
Quick-Reference
AT
*
MD1 =On Your modem signals the remote modem to disconnect by sending a PSTN cleardown.
Modem Flow
Modem Flow Control
Lets the modem generate and respond to XON/XOFF flow control signals received at the
DIAL LINE or LEASED LINE port. NOTE: This option only applies to the Normal data
transfer mode.
AT
*
MF0 =Off The modem flow control is not used.
AT
*
MF1 =On The modem periodically sends XON signals to the remote modem when it can receive data.
When the modem cannot receive data, it sends an XOFF signal to the remote modem.
Mod
Modulation Mode
Determines the modulation mode used by the modem in data transmission. Changing
modulation mode resets AT
*
MX (Max Rate) and AT
*
MN (Min Rate) to their defaults for
the modulation mode selected. When you select a mode, ensure that the Max Rate AT
*
MX
(Max Rate) and AT
*
MN (Min Rate) parameter options are within the valid range for the
mode.
AT
*
MM0 =V32bis Auto The modem negotiates the highest common connection in one of the following modulation
modes: V.32bis, V.32 (coded or uncoded), V.22bis, Bell 212, V.21 or Bell 103 (depending on
the Low Speed option).
AT
*
MM1 =Auto V32 The modem negotiates the highest common connection in one of the following modulation
modes: V.32 (coded or uncoded), V.22bis, Bell 212, V.21 or Bell 103 (depending on the Low
Speed option).
AT
*
MM2 Mod=V32bis
Only
V.32bis or V.32 modulation mode is used.
AT
*
MM3 =V32 Only V.32 modulation mode is used.
AT
*
MM12 =V32 Uncoded V.32 modulation mode is used without the Trellis-coded Modulation (TCM) scheme. This
selection reduces end-to-end data delay. With this selection (while operating at 4.8 bps), you do
not have an embedded secondary channel (i.e., network management and remote configuration
capability are not available).
AT
*
MM4 =V22bis Only V.22bis modulation mode is used.
AT
*
MM5 =212 Only Bell 212 modulation mode is used.
AT
*
MM6 =103 Only Bell 103 modulation mode is used.
AT
*
MM7 =V21 Only V.21 modulation mode is used.
AT
*
MM10 =V.34 Auto The modem negotiates the highest common connection in one of the following modulation
modes: V.34, V.32bis, V.32 (coded or uncoded), V.22bis, Bell 212, V.21 or Bell 103 (depending
on the Low Speed option). This option does not display on the 3264 V.32bis Series Modem.
AT
*
MM11 =V.34 Only The modem negotiates the highest common connection in the V.34 modulation mode. This
option does not display on the 3264 V.32bis Series Modem.
Min Rate
Minimum Rate
Sets the minimum communication rate. Options vary with the modulation mode.
AT
*
MN0 =300
AT
*
MN1 =1200
AT
*
MN2 =2400
AT
*
MN3 =4800
AT
*
MN4 =7200
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.