User's Manual

&Tn Testing and Diagnostics (See Chapter 4)
Testing commands must be initiated in command mode (at the end of the command line) with asynchronous
operation in the Direct mode, selected (&Q0) at a speed of 1200 bps or faster. A telco connection must be
established prior to loopback tests. If these conditions are not met, an ERROR result code is issued. If a
local analog loopback is initiated while the modem is connected, the modem disconnects beforeperforming
the test. A test remains active for the period of time specified in register S18. If S18 is zero, the test aborts
when the user issues the &T0 command.
&T0/&T Terminates any test currently in progress.
&T1 Initiates a local analog loopback in accordance with ITU-T V.54, L3; verifies the path
between the local DTE and the local modem.
&T8 Initiates a local analog loopback with self-test in accordance with ITU-T V.54, L2.
&V View Configuration Profiles
&V Displays the active configuration profile.
&Wn Store the Current Configuration to Nonvolatile RAM
&W0 Writes the current active configuration to profile 0 in nonvolatile RAM.
&W1 Writes the current active configuration to profile 1 in nonvolatile RAM.
&Yn Select the Default Profile
&Y0/&Y Uses profile 0 on power-up. (Default)
&Y1 Uses profile 1 on power-up.
&Zn Store Telephone Numbers (n=0to3)
&Zn Store one of four dial strings (including a telephone number) of up to 45 digits in nonvolatile RAM.
For example: to store the telephone number 002852117 to RAM location 1, issue the following command:
Command:AT&Z1=002852117<CR>
2.2.b Commands Preceded by \
\An Select Maximum MNP Block Size
The modem will operate an MNP error corrected link using a maximum block size controlled by the
parameter supplied.The parameter value, if valid, is written to S40 bits 6 and 7.
\A0 64 characters.
\A1 128 characters. (Default)
\A2 192 characters.
\A3 256 characters.