Data Sheet
World Modem NET
Page 24 of 64
2005 Copeland Communications, Inc.
World Modem NET Datasheet Rev 1.0
Extended AT& Command Set (Command Defaults in Bold) (Continued)
Command
Action
&H7
ITU-T V.22 only (1200 bps)
&H8
Bell 212 only (1200 bps)
&H9
Bell 103 only (300 bps)
&H10
ITU-T V.21 only (300 bps)
&H11
V.23 (1200/75 bps)
&Pn
Japan pulse dialing
&P0
Configure modem for 10 pulse-per-second pulse dialing (Japan)
&P1
Configure modem for 20 pulse-per-second pulse dialing (Japan)
&Tn
Test mode
&T0
Cancel test mode (Escape to command mode to issue AT&T0). This command will also report the
number of bit errors encountered on the previous &T4 test.
&T2
Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the
DSP (CC-14.4K2/CC-33K2/CC-56K2 only). The modem echoes data from TX pin back to RX pin.
&T3
Initiate ITU-T V.54 (ANALOOP) test. Modulation set by &H AT command. Test loop is through the
DSP, DAA interface section, DAA interface and analog hybrid circuit. The modem echoes data
from TX pin back to RX pin.
Initiate transmit as originating modem with automatic data generation. Modulation, data rate and
symbol rate are set by &H, &G and S41. Data pattern is set by the S40 register. Continues until
the ATH command is sent after an escape into command mode.
&T4
Data is also demodulated as in ANALOOP, and any bit errors are counted to be displayed after the
test using &T0.
Initiate transmit as answering modem with automatic data generation. Modulation, data rate, and
symbol rate are set by &H, &G and S41. Data pattern is set by the S40 register. Continues until
ATH command is sent after escape into command mode.
&T5
Data is also demodulated as in ANALOOP, and any bit errors are counted to be displayed after the
test using &T0.
&T6
Compute checksum for firmware-upgradeable section of program memory. If no firmware upgrade
is installed, &T6 returns 0x0408.
&Xn
Automatic determination of telephone line type.
&X0
Abort &x1 or &x2 command