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fix minor typos in Modem-HOWTO.sgml

This commit is contained in:
Jason Leschnik 2016-10-24 22:51:48 +11:00
parent 6d17346dde
commit a1facdb035
1 changed files with 8 additions and 8 deletions
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LDP/howto/linuxdoc/Modem-HOWTO.sgml
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@ -177,7 +177,7 @@ not in the trademark sense. All other trademarks belong to their
respective owners.
<sect2> Credits
<p> The following is only a rough approximation of how this this
<p> The following is only a rough approximation of how this
document was created in the year 2000: About 1/4 of the material here
was lifted directly from Serial-HOWTO v. 1.11 (1997) by Greg Hankins.
<url url="mailto:gregh@twoguys.org"> (with his permission). About
@ -461,7 +461,7 @@ external USB. The internal one is installed inside of your PC (you
must remove screws, etc. to install it). An external one just plugs
in to a cable: USB cable (USB modem) or to the serial port (RS-232
serial modem). As compared to external serial modems, the internal
modems are less expensive, are less likely to to suffer data loss due
modems are less expensive, are less likely to suffer data loss due
to buffer overrun, and usually use less electricity. An internal
modem obviously doesn't use up any desk space.
@ -1150,7 +1150,7 @@ Pinout and Signals for more details.
<sect2> Internal Modem Contains Serial Port
<p> For an internal modem there is no 9-pin connector but the behavior
is almost exactly as if the above mentioned cable wires existed.
Instead of a a 12 volt signal in a wire giving the state of a modem
Instead of a 12 volt signal in a wire giving the state of a modem
control line, the internal modem may just use a status bit in its own
memory (a register) to determine the state of this non-existent
"wire". The internal modem's serial port looks just like a real
@ -2476,7 +2476,7 @@ stty in the Serial-HOWTO or Text-Terminal-HOWTO..
modem, you first need to make sure it can be found and that
AT-commands and the like can be sent to it. So I suggest you first
give it a very simple configuration using the communication program
you will be using on the port and see it it works. If this works you
you will be using on the port and see if it works. If this works you
may then want to improve on the configuration, If not then see <ref
id="cant_find_modem" name="My Modem is Physically There but Can't be
Found">. A winmodem may be hard to find and will not work under
@ -4111,7 +4111,7 @@ This is one way to crudely transfer files with someone on a MS Windows
PC who uses HyperTerminal or Terminal (for Windows 3.x or DOS). These
two MS programs are something like minicom. Using this simple manual
method (for Linux-to-Linux or MS-to-Linux) requires two people to be
present, one one each end of the phone line connection running a
present, one on each end of the phone line connection running a
terminal communications program. Be warned that if both people
type at the same time it's chaos. It's a "last resort" way to
transfer files between any two people that have PCs (either Linux or
@ -5225,7 +5225,7 @@ Thus, disregard what it says about the IRQ, because it's just assuming
the standard IRQs. This is done, because IRQ detection is unreliable,
and can be fooled. But if and when setserial runs from a start-up
script, it changes the IRQ's and displays the new (and hopefully
correct) state on on the startup screen. If the wrong IRQ is not
correct) state on the startup screen. If the wrong IRQ is not
corrected by a later display on the screen, then you've got a problem.
So, even though I have my <tt/ttyS2/ set at IRQ 5, I still see
@ -5921,7 +5921,7 @@ number of changes per second will be that high.
Looked at another way, put an imaginary tic mark separating each bit
(even though the voltage may not change). 38,400 baud then means
38,400 tic marks per second. The tic marks at at the instants of
38,400 tic marks per second. The tic marks at the instants of
permitted change and are actually marked by a synchronized clock
signal generated in the hardware but not sent over the external cable.
@ -6032,7 +6032,7 @@ While this HOWTO doesn't cover such modems, some links to documents
that do may be found at the start of this HOWTO. The next 3
sub-sections: DSL, Cable, and ISDN, briefly discuss such modems. For
both DSL and Cable modems, the basic QAM modulation method is similar
to ordinary analog analog modems. See <ref id="QAM_" name="Combination
to ordinary analog modems. See <ref id="QAM_" name="Combination
Modulation">
<sect1>Digital Subscriber Line (DSL)