I2 - Perform ROM Checksum Test
Command Line Format
AT [cmds] I2 [cmds] <CR>
Suffix Values
N/A
Default
N/A
Stored by &Wn
N/A
Displayed by &V
N/A
Description
I2 instructs the modem to verify the ROM checksums. Depending on whether
the ROM checksums are determined to be correct, the modem produces an info-text
that resembles a verbose result code. The actual result code associated
with this command is OK.
When the checksum is valid, the info-text produced is as follows:
OK
where the associated <tCR>and <LF>characters follow the rules
defined for info-text messages. Thus, when V0
is in effect, and the ROM checksum ID verified, the modem response to the
ATI2<CR>command line is as follows:
OK<CR><LF>0<CR>
where the <CR>and <LF>characters are controlled by registers
S3 and S4, respectively.
When the ROM checksum fails, the modem responds by issuing the following
info-text:
ERROR
where the associated <CR>and <tLF>characters follow the rules
defined for info-text messages. Thus, V1 is in
effect, and the ROM checksum is invalid, the response to the ATI2<CR>command
line is as follows:
<CR><LF>ERROR<CR><LF><CR><LF>OK<CR><LF>
where the <CR>and <LF>are controlled by registers S3 and S4,
respectively.
DTE Interface Lines Affected
RD
LEDs Affected
RD
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