fredrick@acd.acd.ucar.edu (Tim Fredrick) (04/10/91)
Can someone who has successfully attached a modem or terminal please let
me know how it's done? I have a serial cable and an 8-port serial adapter
in my model 530 -- the cable running every line straight through.
For modem communications, we need to use tip. Here is how I've tried to
set it up:
1. Cable from port 5 to the terminal or modem
2. smit tty, add a tty, 8-port Asych adapter EIA-232, port 5
enable logins, 9600 baud, no parity, 8 bit characters, XON-XOFF yes,
terminal type DUMB, stty on run time [hupcl,cread,brkint,icrnl,opost,
tab3,onclr,isig,icanon,echo,echoe,echok,echoctl,echoke,imabel,iexten],
and stty attributes on login [cread,echoe,cs8,ixon,ixoff,clocal]
3. Step 3 has created tty4.
4. In smit, configure a tty
5. chmod 666 /dev/tty4
6. echo hello > /dev/tty4 doesn't echo anything to a wyse-75 I
attach to the port, whether I use the
straight through cable or with pins 2 and 3 switched.
7. tip returns the message "link down" when trying to use the port.
8. kermit -l /dev/tty4 -b 9600 just hangs.
Can anyone provide any insight? Has anyone successfully attached a modem who
will tell me exactly with their smit settings where and how they set it up
to use tip? Of course I feel as if I've tried everything at this point :-).
Thanks in advance.
--Timrobin@pensoft.uucp (Robin Wilson) (04/10/91)
In article <10976@ncar.ucar.edu> fredrick@acd.acd.ucar.edu (Tim Fredrick) writes: >For modem communications, we need to use tip. Here is how I've tried to >set it up: > 1. Cable from port 5 to the terminal or modem I assume the IBM provided cable? > 2. smit tty, add a tty, 8-port Asych adapter EIA-232, port 5 > enable logins, 9600 baud, no parity, 8 bit characters, XON-XOFF yes, ^^^^^^^^^^^^^ what is this set to? ENABLE = getty locks the port. SHARE = wait for carrier to lock port. DELAY = wait for "character" to lock port. DISABLE= Do not start getty, no lock on port. > terminal type DUMB, stty on run time [hupcl,cread,brkint,icrnl,opost, > tab3,onclr,isig,icanon,echo,echoe,echok,echoctl,echoke,imabel,iexten], > and stty attributes on login [cread,echoe,cs8,ixon,ixoff,clocal] ^^^^^^^^^^^^^^^^^^^^^^^^ None of the "stty attributes" (either for "login" or "run time") will ever be set until you start a getty. The "login" attributes will be set while getty is running, but should get unset when the port is disabled. (Hence, none of these will affect "tip" unless you are trying to use the port "bi-directionally".) > 3. Step 3 has created tty4. > 4. In smit, configure a tty > 5. chmod 666 /dev/tty4 Should not be required. > 6. echo hello > /dev/tty4 doesn't echo anything to a wyse-75 I > attach to the port, whether I use the > straight through cable or with pins 2 and 3 switched. For a terminal you will need the "IBM Modem eliminator" or a "NULL MODEM" cable. For a modem you will need a standard IBM serial "MODEM" cable. > 7. tip returns the message "link down" when trying to use the port. The "tip" facility requires "carrier detect" be held high before you can access the port. To use this port with a "modem" I suggest you try "cu". Add an entry in "/usr/lib/uucp/Devices" that reads: Direct tty4 - Any direct and use the command: "cu -ltty4 -s<speed>" (where <speed> is the bps you want to use to call the remote system). > 8. kermit -l /dev/tty4 -b 9600 just hangs. My guess is the "Carrier Detect" problem that "tip" has, but I never used kermit, so I don't know for sure. >Can anyone provide any insight? Has anyone successfully attached a modem who >will tell me exactly with their smit settings where and how they set it up >to use tip? Of course I feel as if I've tried everything at this point :-). Use the "default" SMIT settings. Set carrier detect to "always on" on the modem. This should work with "tip", but it will mess up "bi-directional" modem use (dial-in/dial-out) because "getty" uses "Carrier Detect" to figure out when the remote modem has made a connection, and setting it to "always on" will confuse getty. If this info doesn't solve your problems, mail me for a complete doc on setting up modems on the RS/6000. +-----------------------------------------------------------------------------+ |The views expressed herein, are the sole responsibility of the typist at hand| +-----------------------------------------------------------------------------+ |UUCP: pensoft!robin | |USNail: 701 Canyon Bend Dr. | | Pflugerville, TX 78660 | | Home: (512)251-6889 Work: (512)343-1111 | +-----------------------------------------------------------------------------+