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- SERIAL INTERFACE PORTS
- ~~~~~~~~~~~~~~~~~~~~~~
- For NOS to be able to communicate with the outside
- world, it requires an interface and a name for that
- interface to be specified.
-
- For instance, let's presume for a moment that you are
- going to be using a tnc modem connected to serial port
- 1. In the main startup file, there will be a line
- that specifies that you want to send tcp/ip traffic
- down serial port 1. But instead of saying "serial
- port 1" every time we want to refer to this
- input/output port, we give it an alias which
- simplifies the whole procedure. This name can be
- anything as long as it isn't too long or too strange.
- There's little point in getting the computer to work
- hard processing long names like "my_tnc_interface" so
- to encourage a sane approach, I have set a maximum
- limit of 5 characters.
-
- Typical port names are; tnc0, sl0, vhf, uhf, 70cm, 2m,
- etc... I'm sure you get the idea.
-
- These names are also referred to in routing tables. A
- routing table is the means by which NOS determines
- where to send traffic.
- !
- SLIP LINKS
- ~~~~~~~~~~
- If this is a second station in your setup, you may
- wish to connect this station to the primary one using
- what is called a SLIP link (Serial Link Interface
- Protocol) i.e. a serial wire that connects the other
- tcp/ip computer to this one.
-
- At the moment, this installation program only caters
- for two types of connection. A serial link to a tnc
- (the tnc being used in KISS mode - see your tnc manual
- for how to do that), and the SLIP link to another
- computer.
-
- By the way, the interface type is "ax25" if it's
- driving a tnc.
- !
- USING DIFFERENT INTERFACES
- ~~~~~~~~~~~~~~~~~~~~~~~~~~
- The installation program will assume that you always
- mean serial ports throughout, so when the installation
- is complete, you will have to edit the AUTOEXEC.NOS
- file so that ATTACH lines refer to your interface
- instead. Don't forget to keep the interface name the
- same, i.e. if you call a port "vhf", you will need to
- retain this name otherwise routing tables etc will not
- be correct.
- !
- THE TABLE EDITOR
- ~~~~~~~~~~~~~~~~
- Press <F10> to enter the edit mode.
-
- Use the right and left cursor keys (or the <TAB> key)
- to put the cursor into the required port setup column.
-
- The "Use" and "Type" fields are TOGGLED by pressing
- any key (except <ENTER>, <TAB>, or cursor keys).
-
- Other fields can be edited as soon as the cursor is
- under the first character in that field.
-
- Press <TAB> to jump from port to port.
-
- Press <ENTER> to finish editing.
- !
- WHICH PORT(S) TO USE
- ~~~~~~~~~~~~~~~~~~~~
- You can only specify one port per installation. If you
- ask for a port that isn't standard or doesn't exist,
- you will see a warning message explaining what has
- happened.
- !
- BASIC RULES
- ~~~~~~~~~~~
- Don't set the baud rate too high as PC's in general
- aren't too clever when it comes to serial ports. 4800
- baud is plenty fast enough. In fact, if your machine
- is an XT or a slow AT, don't set the baud rate to more
- than 4800. The baud rate of the computer to tnc link
- should never be slower than the radio link speed but
- can be set equal to it without causing problems. You
- may edit the AUTOEXEC.NOS file ATTACH lines if you
- need to change to higher speeds later.
-
- *CAUTION* Your tnc may be set for a computer link
- speed of 1200 baud (!) and be in ax25 command mode.
- Link Tiny-2's for 4800 baud then use a terminal
- program to tell the tnc to go into KISS mode before
- running NOS. Usually the commands; KISS ON <enter>
- followed by; RESTART <enter> will achieve this if
- it's a Tiny-2 or clone.
-
- When connecting your rig and tnc, open the squelch
- right up and turn the volume up until you see the DCD
- light on constantly. Then, turn the squelch up until
- the DCD light just goes out and stays off when there
- are no signals coming in. This is a fairly good rule
- of thumb approach. Ask SEVERAL of your surrounding
- users how they have theirs set up (don't rely on just
- one other station as some still have bad setups after
- some 5 years plus of operation!).