Chapter 4 - V.22bis Commands
&F Restore Factory Configuration (Profile)
The modem loads the factory default configuration (profile). The factory defaults are identified for each command and in the
Syntax &F[<value>]
Defined Values
<value> Decimal number corresponding to the selected configuration.
0Restore factory configuration 0.
1Same as 0; allowed for compatibility. Result Codes OK
ERROR If the modem is connected
&T Local Analog Loopback Test
The modem will perform the local analog loopback test if &T1 is selected. The test can be run only when in an asynchronous operation in
Syntax &T[<value>]
Defined Values
<value> Decimal number corresponding to the selected option.
0Terminates test in progress. Clears S16.
1Initiates local analog loopback, V.54 Loop 3. Sets S16 bit 0. If a connection exists when this command is issued, the modem hangs up. The CONNECT XXXX message is displayed upon the start of the test.
**Load to Internal RAM
This command allows the internal SRAM to be loaded with patch code for minor firmware upgrade including country profile customization. This process transfers the S37 file from the host computer to the modem. The data transfer is done via an ASCII transfer. A successful upload can be verified by invoking ATI3 and/or ATI4 command depending on which of the two were modified. The patch is erased when the power is turned off.
Procedure
1.Configure the communications application program for a DTE rate of 115200 bps. Check the modem for response by typing AT.
2.Issue AT** command to initiate the download process. The following message appears: Download initiated.
3.Send the patch code (e.g., patv00028.s37). The following message appears on successful upload: Modem Firmware Successfully Loaded
14 |
