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536EX Chipset Developer’s Manual 45
Intel Confidential
Data Mode AT COMMANDS
&Pn 0
Dial Pulse Ratio: This command determines the make/break (that is, off-hook/on-hook) ratio during
pulse dialing.
n = 0* Make = 39%; Break = 61% at 10 pulses per second—for use in the United States.
n = 1 Make = 33%; Break = 67% at 10 pulses per second—for use in the United Kingdom and
Hong Kong.
&Sn 0
DSR (Data Set Ready) Option: This command controls how the modem treats the DSR signal.
n = 0* DSR circuit always on
n = 1 DSR circuit is on during handshaking, off in test or idle modes. DSR is off when the carrier
is lost.
&Tn 0
Data Mode Self-Test Command: This command is used in data mode (except x2 and V.90 connections)
to initiate and terminate loopback tests for testing modem-to-modem and DTE-to-modem data
communication integrity.
n = 0* Terminates test in progress
n = 1 Local analog loopback
n = 8 Local analog loopback with self-test
&Un 0
Disable Trellis Coding: This command selects whether the modem transmits or receives modulated
9600 bps carrier with QAM or Trellis encoding for V.32.
n = 0* Enabled (Trellis modulation with QAM modulation as a fallback)
n = 1 Disabled (QAM modulation only)
&Vn 0
View Active Configuration and Stored Profiles: This command causes the modem to display the
command and S-register information contained in the active user profile and in one of two stored
profiles.The command &V0 displays the active profile and the stored profile 0; &V1 displays the active
profile and the stored profile 1. The information in the active profile is stored into the user profiles with the
&Wn command. &W0 stores the active profile into the stored profile 0; &W1, the stored profile 1.
n = 0* Stored profile 0
n = 1 Stored profile 1
AT&V0
ACTIVE PROFILE:
E1 L2 M1 T Q0 V1 W0 X4 Y0 &C1 &D2 &G0 &J0 &K3 &P0 &S0 &Y0
%A013 %C1 %E1 \A3 \C0 \G0 \J0 \T000 \X0 -J1
S00:000 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:060 S08:002
S09:006 S10:014 S11:070 S12:050 S18:000 S25:005 S27:064 S32:032 S33:010
+ES=003,000,002 +DS=003,000
STORED PROFILE 0:
E1 L2 M1 T Q0 V1 W0 X4 Y0 &C1 &D2 &G0 &J0 &K3 &P0 &S0
%A013 %C1 %E1 \A3 \C0 \G0 \J0 \T000 \X0 -J1
S00:000 S02:043 S06:002 S07:060 S08:002 S09:006 S10:014 S11:070 S12:050
S14:138 S18:000 S21:048 S22:118 S23:048 S25:005 S27:064 S30:000 S32:032
S33:010 +ES=003,000,002 +DS=003,000
TELEPHONE NUMBERS:
&Z0 = &Z1 =
&Z2 = &Z3 =
Table 18. Data Mode Command Descriptions (Continued)
Command Default Description
NOTE: An asterisk (*) denotes the factory-default setting.